SC802A VER2.1
SPECIFICATION OF SC802A
Akihabara Inc.
www.akiba-tech.com
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SC802A VER2.1
CONTENT
1. General description --------------------------------------------------------------------------3
2. Maximum absolute limit---------------------------------------------------------------------3
3. Mechanical characteristics------------------------------------------------------------------3 a) Physical data
b) External dimensions
4. Electrical characteristics---------------------------------------------------------------------4 a) DC characteristics b) AC characteristics
5. Operating Principles--------------------------------------------------------------------------6 a) Pin description b) Block diagram
c) Instruction description
6. Operating Methods---------------------------------------------------------------------------13 a) Interface with MPU b) Power supply
c) Operating example
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SC802A VER2.1
1. General description
SC161A, a dot-matrix character LCD module, design for displaying 1 line 16 row characters. Character font is 5X7 dots with cursor. The SC161A provides two types of interfaces to MPU: 4-bit and 8-bit interfaces. SC161A can includes EL or LED backlight for custom design. The custom can design for color of EL or LED backlight, viewing angle and LCD type.
2. Maximum absolute limit
Characteristics Symbol Ratings Remark Operating Voltage VDD -0.3V to +7.0V Driver Supply Voltage VLCD VDD - 12V to VDD + 0.3V Input Voltage Range VIN -0.3V to VDD + 0.3V
TA1 -10°C to+60°C Normal temperature LCM
Operating Temperature
-20°C to+60°C Ta2 Wide temperature LCM
Storage Temperature TSTO -25°C to+70°C
Note: Stresses beyond those given in the Absolute Maximum Rating table may cause operational errors or damage to the device.
3. Mechanical characteristics
a) Physical data
Unit Remark ITEM Standard value Number of characters 8×2
mm Module size 40.0×35.50×7.5
mm Viewing area 30.40×14.20
mm Active area 25.74×9.48
mm Character size 2.78×4.49
mm Character pith 3.75
g Approx. weight
Drive method 1/16 duty 1/5bias
b) External dimensions 4037.7360.53.40.570.510.382.542PITCH2.54x7=17.78R0.5x161615R0.9x16210.512345678910111213141516SCALE:2:1DATEREV.30.4(V.A)R1.25x435.8R2.0x4VSSVDDV0RSR/WEDB0DB1DB2DB3DB4DB5DB6DB70.50.5714.2(V.A)7.33.23.51.623.330UNIT:mmDigiTronDRAWN:CHECKED:CONFIRMED:SC802A05/08/20031.0 Akihabara Inc. www.akiba-tech.com Page 3 of 3
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SC802A VER2.1
4. Electrical characteristics
a) DC characteristics
a.1) DC CHARACTERISTICS (TA =25 °C, VDD = 2.7 to 4.5V) Characteristics Symbol Limit Input High Voltage Input Low Voltage Input High Current Input Low Current Output High Voltage Output Low Voltage LCD Voltage Operating Current
VIm 0.7VDDUnit Test Condition
Min. Typ. Max. - VDD V 0.55 V VDD = 3.0V 1.0 uA VlL -0.3 IIh -1.0 Voh VOL Vlcd Idd
IlL -5.0 -15 -30 uA 0.75VDD- - V IOH = - 0.1mA Pins: DB7-0 - - 0.2VDDv |OL= 0.1mA Pins: DB7-0 3 4.5v 13 V
1.0 mA
Note: VDD = 3V
a.2) DC CHARACTERISTICS (TA = 25°C, VDD = 4.5 to 5.5V) Characteristics Symbol Limit Input High Voltage Input Low Voltage Input High Current Input Low Current Output High Voltage Output Low Voltage LCD Voltage Operating Current
VIm 2.2 VlL -0.3 IIh -2.0 Voh VOL Vlcd Idd
Unit Test Condition
Min. Typ. Max. VDD V 0.6 V VDD = 5.0V 2.0 uA IlL -20 -50 -100 uA 2.4 - VDD V IOH = - 0.1mA Pins: DB7-0 - - 0.4 V IOL= 0.1mA Pins: DB7-0 3 4.5 13 V
1.0 mA
Note: VDD = 5V
b) AC characteristics
b.1) AC CHARACTERISTICS (TA = 25°C, VDD = 2.7 to 4.5V) Write Mode (Writing data from MPU to LCD module) Characteristics Symbol Limit E Cycle Time E Pulse Width E Rise/Fall Time Address Setup Time Address Hold Time Data Setup Time Data Hold Time
tc tpw tR,tF tsp-i tHD1 tsP2 tHD2
1000 450 - 60 20 195 10
- - -
- 25 -
Unit Test Condition ns PinE ns ns ns ns ns
PinE PinE
Pins: RS, R/W, E Pins: RS, R/W, E Pins: DB7-0
Min. Typ. Max. ns Pins: DB7-0
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SC802A VER2.1
Read Mode (Reading data from LCD module to MPU)
Limit
Unit Test Condition Characteristics Symbol Max.Min.Typ.
E Cycle Time tc 1000nsPinE E Pulse Width tw 450nsPinE E Rise/Fall Time tR,tF 25nsPinE Address Setup Time tsp-i 60nsPins: RS, R/W,EAddress Hold Time tHD1 20nsPins: RS, R/W,EData Output Delay Time tD 360nsPins: DB7-0 Data hold time tHD2 5.0--nsPin DB7- 0 b.2) AC CHARACTERISTICS (ta = 25°C, VDD = 4.5 to 5.5V) Write Mode (Writing Data from MPU to LCD module)
Limit Unit Test Condition
Characteristics Symbol Min. Typ. Max.
ns PinE E Cycle Time tc 400
150 - - ns PinE E Pulse Width tpw
- - 25 ns PinE E Rise/Fall Time tR,tF
30 ns Pins: RS, R/W, E Address Setup Time tsp-i
tHD1 10 ns Pins: RS, R/W, E Address Hold Time
tsP2 40 ns Pins: DB7-0 Data Setup Time
10--nsPins: DB7-0 Data Hold Time tHD2
Read Mode (Reading Data from LCD module to MPU)
Limit Unit Test Condition
Characteristics Symbol Typ. Max. Min.
E Cycle Time tc 400 ns Pin E
E Pulse Width tw 150 ns Pin E
E Rise/Fall Time tR,tF 25 ns Pin E
tsp-i 30 ns Pins: RS, R/W,E Address Setup Time
Address Hold Time tHD1 10 ns Pins: RS, R/W,E
Data Output Delay Time tD 100 ns Pins: DB7-0 Data hold time
tHD2
20 - - ns Pin DB7-0
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SC802A VER2.1
TIMING CHARACTERISICS RSth1tsu1R/WtwtfEth1trtsu2th2DB0~DB7ValidDatatc Write Timing RStsuthR/Wtwtf thEtrtdDB0~DB7Valid Datatctdh Read Timing 5. Operating Principles
a) Pin description
Pin NO. Symbol Level Function 1 VSS 0V Ground 2 VDD 2.7V~5.5V Supply voltage for logic 3 V0 Variable voltage for LCD 4 RS H/L H: Instruction code L: Data 5 R/W H/L H: Read signal L: Write signal 6 E enable signal H→L
H/L 7 DB0 Data bits
In case of 4 bits instruction, data is H/L 8 DB1 transferred by twice using only 4 buses of D4 H/L 9 DB2 – D7 ,and D0 – D3 are not used , first H/L 10 DB3 operation is higher order 4 bits and second H/L 11 DB4 is lower 4 bits of 8 bits , but in case H/L 12 DB5 of 8 bits instruction , data is transferred by data by data bus of D0 – H/L 13 DB6 D7 H/L 14 DB7 15 16
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SC802A VER2.1
b) Block Diagram ACIRI/O B U F F E RDECODERTiming Control CircuitRSR/WED0-D3D4-D7DD RAMCursor and blink CKT. COMDrivingCircuitLCDDR CGRAMCG RAMDriving CircuitVDDVOVSSBUSYFLAGP TO S registor a. Data Register (DR): Dris a register used for temporary Storage of the data read/write form/into DD
RAM and CG RAM.
b. Instruction Register (IR): is a register available for storing the instruction codes and address
information of display data (DD) RAM and character generator (CG) RAM.
c. BUSY FLAG (BF): When the Busy Flag is “1”,it shows that LCM is in internal operation and it can
not accept the next instruction.
d. Character Generator (CG) ROM: This ROM Generates character pattern from 8-bit character code
and provides 192 character patterns.
e. Character Generator (CG)RAM: This RAM allows the user to rewrite the character patterns freely
according to the program.
f. Address Counter (AC): This address counter is used to give the address information of DD RAM
and CG RAM.
g. Display Data (DD) RAM: This display data RAM is used to store the display data expressed by 8-bit
character code . The capacity is 80x 8bits and data for 80 characters can be storage. h. Cursor and Blink Control Circuit: This circuit generates the cursor and blink.
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SC802A VER2.1
RAM's address and the LCD's position shown bellows. Display Character address code: Display position 1 2 3 4 5 6 7 8 DDRAM Address
00 01 02 03 0440 41 42 43 440545
0646
0747
Relationship between Character Code (DDRAM) and character Pattern (CGRAM)
Character code DD RAM Data
CG RAM Address B4
B3
B2
B1
B0
B7
Character Pattern CG RAM Data B6
B5 B4 B3 B2B1
B0
B7 B6 B5 B4 B3 B2 B1 B0 B5000
0 0 0 0 x 0 0
0
0
0
0
01111000
0 0 0 0 x 0 0
1
0
0
1
01111
0011001100110011
0101010101010101
x
x
x
x
x
x
1 1 11000000010000010
1000000000000000
0 0 10 0 10 0 10 0 10 0 10 0 10 0 00
1
1
0 0 10 0 10 0 10 0 10 0 10
1
1
0 0 01. ▆ It means that the bit0~2 of the character code correspond to the bit3~5 of the CG RAM address.
2. ▆ these areas are not used for display, but can be used for the general data RAM. 3. When all of the bit4-7 of the character code is 0, CG RAM character patterns are selected.
4. \" 1 \": Selected,\" 0 \": No selected,\" X\": Do not care (0 or 1).
5. for example (1), to set character code (b2 = b1 = b0 = 0, b3 = 0 or 1, b7-b4 = 0) is to display\" T\". That means character code (00)16, and (08)16 can display\" T” character.
6. The bits 0-2 of the character code RAM is character pattern line position. The 8th line is the cursor position and display is formed by logical OR with the cursor
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CGROM Character Code Table: Upper 4bitLower 4bit SC802A VER2.1
LLLLLLLHLLHLLLHHLHLLLHLHLHHLLHHHHLLLHLLHHLHLHLHHHHLLHHLHHHHLHHHH CGRAM (1)(2)LLLLLLLHLLHL(3)LLHH(4)LHLL(5)LHLH(6)LHHL(7)LHHH(8)HLLL(1)HLLH(2)HLHL(3)HLHH(4)HHLL(5)HHLH(6)HHHL(7)HHHH(8)
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SC802A VER2.1
c) Instruction description
Control and display instructions will show in details as following: c.1) Clear Display
RS R/W D7 D6 D5 D4 D3 D2 D1 D0 0 0 0 0 0 0 0 0 0 1 It clears the whole display and sets display data RAM's address 0 in address counter. c.2) Return Home
RS R/W D7 D6 D5 D4 D3 D2 D1 D0 0 0 0 0 0 0 0 0 1 X X: Do not care (0 or 1)
It sets display data RAM's address 0 in address counter and display returns to its original position. The cursor or blink goes to thedisplay (to the 1st line if 2 lines are displayed). The contents of the Display Data RAM do not change. c.3) Entry Mode Set
During writing and reading data, it sets cursor move direction and shifts the display. RS R/W D7 D6 D5 D4 D3 D2 D1 D0
0 0 0 0 0 0 0 1 I/DS I/ D = 1: Increment, I / D = 0: Decrement. S = 1: The display shift, S = 0: The display does not shift S= 1 I/D= 1 It shifts the display to the left S= 1
I/D=0
It shifts the display to the right
c.4) Display On/Off Control
RS R/W D7 D6 D5 D4 D3 D2 D1 D0
0 0 0 0 0 0 1 D
C B D = 1: Display on, D = 0: Display off C = 1: Cursor on , C = 0: Cursor off B = 1: Blinks on, B= 0: Blinks off c.5) Cursor or Display Shift
Without changing DD RAM's daters, it can move cursor and shift display
RS R/W D7 D6 D5 D4 D3 D2 D1 D0
0 0 0 0 0 1 S/CR/LX X
S/C R/L Description Address Counter 0 0 Shift cursor to the left AC = AC - 1 0 1 Shift cursor to the right AC = AC + 1 1 0 Shift display to the left. Cursor follows the display shift AC=AC 1 1 Shift display to the right. Cursor follows the display shift AC=AC c.6) Function Set
RS R/W D7 D6 D5 D4 D3 D2 D1 D00 0 0 0 1 DLNF X X X: Do not care (0 or 1)
DL: It sets interface data length.
DL = 1: Datas are transferred with 8-bit lengths (DB7 - 0).DL = 0: Datas are transferred with 4-bit lengths (DB7 - 4).
(It needs two times to transfer datas) N: It sets the number of the display line. N = 0: One-line display. N = 1: Two-line display. F: F = 1: 5 x 10 dots character font. N F No. of Display Lines Character Font Duty Factor 0 0 1
0 1 X
1 1 2
5X7 dots 5x 10 dots 5x7 dots
1 /8 1 /11 1 /16
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SC802A VER2.1
c.7) Set Character Generator RAM Address
RS R/W D7 D6 D5 D4 D3 D2 D1 D0
0 0 0 1 a a a a a a It sets character generator RAM address (aaaaaa)2 to the address counter. Character generator RAM data can read or write after this setting.
c.8) Set Display Data RAM Address
RS R/W D7 D6 D5 D4 D3 D2 D1 D0
0 0 1 a a a a a a a It sets display data RAM address (aaaaaaa)2 to the address counter. Display data RAM can read or write after this setting. In one-line display (N = 0), (aaaaaaa)2; (OO)16 - (4F)16
In two-line display (N = 1), (aaaaaaa)2: (00)16 - (27)16,gfor the first line, (aaaaaaa)2: (40)16 - (67)16,gfor the second line. c.9) Read Busy Flag and Address
RS R/W D7 D6 D5 D4 D3 D2 D1 D0 0 1 BF a a a a a a a When (BF = 1) indicates that the system is busy now, it will not accept any instruction until no busy (BF = 0). At the same time, the address counter content’s (aaaaaaa)2; is read out.
c.10) Write Data to Character Generator RAM or Display Data RAM
RS R/W D7 D6 D5 D4 D3 D2 D1 D0 1 0 d d d d d d d d It writes data (dddddddd)2 to character generator RAM or display data RAM. c.11) Read Data from Character Generator RAM or Display Data RAM
RS R/W D7 D6 D5 D4 D3 D2 D1 D0 1 1 d d d d d d d d
It reads data (dddddddd)2 from character generator RAM or display data RAM. To get the correct data readout is shown below:
(ⅰ)Set the address of the character generator RAM or display data RAM or shift the cursor instruction. (ii) Send the “Read “instruction.
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SC802A VER2.1
Instruction table Instruction Code
Instruction RS RW D7 D6 D5 D4 D3 D2Clear Display
Return Home
0 0
0 0
0
0
0
0
D10
D0 1
Description
Execution time(fosc=270KHz)
Write \"20H\" to DDRAM and 1.52ms set DDRAM address to \"OOH\" from AC
Set DDRAM address to 1.52ms \"OOH\" from AC and return cursor to its original position if shifted. The contents of DDRAM are not changed.
Assign cursor moving direction and enable the shift of entire display Set display(D), cursor(C), and blinking of cursor(B) on/off control bit.Set cursor moving and display shift control bit, and the direction, without changing of DDRAM data. Set interface data length (DL: 8-bit/4-bit), numbers of display line (N: 2-line/1- line) and, display font type (F:5x10dots/5x8dots)
38us
0 0 0 0 0 0 0 0 1 -
Entry Mode Set Display ON/ OFF
Cursor or Display Shift Function Set
0 0 0 0 0 0 0 1 I/DS
0 0 0 0
0 0
0 0
0 0
0 1
1 D C B -
38us
S/CR/L-
38us
0 0
0 0
1 DL N F
- -
38us
Set
CGRAM Address Set
DDRAM Address Read Busy Flag and Address Counter
0 0 0 0 0 1
0 1
AC5 AC4 AC3AC2AC1ACOSet CGRAM address in address counter.
38us
1 AC6AC5 AC4 AC3AC2AC1ACOSet DDRAM address in
counter BF AC6AC5 AC4 AC3AC2AC1ACOWhether during internal operation or not can be
known by reading BF. The contents of address counter can also be read. D7 D6 D5 D4 D3 D2 D7 D6 D5 D4 D3 D2
D1
D1
DO DO
Write data into internal RAM (DDRAM/CGRAM). Read data from internal RAM (DDRAM/CGRAM).
38us
38us
Write Data 1 0 to RAM
Read Data 1 1 from RAM
38us
38us
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SC802A VER2.1
6. Operating Methods a) Interface with MPU A0A1-A77RSMUXCDQREZ80Interface to Z80 CPU/WR/RD/IRQLCMRWD0-D7D0-D78 EEInterface to MC6800 CPUA0RSMC6800/RDLCMRW8D0-D7D0-D7 A14RSA15Interface to MCS51 CPU/RD/WRELCMMCS51D0-D78RWD0-D7 Akihabara Inc. www.akiba-tech.com Page 13 of 13
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SC802A VER2.1
b) Power supply Single Supply Voltage TypesVDD5VDual Supply Voltage TypesVDD+3VVDDVDD-VOVDD-V0VDDLCMVO10k~20kLCMVO10k~20kVEEVSSGNDVSSVDD-VO:LCD driving voltageVDD-VO:LCD driving voltagec) Operating example 8-Bit operation and 8-digit 1-line display (using internal reset) No Instruction Display 1 Power on . ( SPLC780A1 starts initializing )
2 4
Entry mode set
0 0 0 0 0 0 0 1 1 0 5 6
1 0 0 1 0 0 0 1 0 1 7 8 9 10
•••
Write data to CG RAM / DD RAM 1 0 0 1 0 0 0 1 0 1 Entry mode set
0 0 0 0 0 0 0 1 1 1 Write data to CG RAM / DD RAM 1 0 0 0 1 0 0 0 0 0
ELCOME_
WELCOME_ WELCOME_ ••••
Write data to CG RAM / DD RAM 1 0 0 1 0 1 0 1 1 1 Write data to CG RAM / DD RAM
WE_
W_
Function set
RS R/W D7 D6 D5 D4 D3 D2 D1 D00 0 0 0 1 1 0 0 X X3
Display on / off control
0 0 0 0 0 0 1 1 1 0
_
_
Operation
Power on reset. No display. Set to 8-bit operation and select 1-line display line and character font.
Display on. Cursor appears. Increase address by one. It will shift the cursor to the right when writing to the DD RAM / CG RAM. Now the display has no shift.
Write “W\". The cursor is incremented by one and shifted to the right.
Write “E \". The cursor is incremented by one and shifted to the right.
Write “E \". The cursor isincremented by one and shifted to the right.
Set mode for display shift when writing
Write\" \"(space). The cursor is incremented by one and shifted to the right.
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SC802A VER2.1
11
Write data to CG RAM / DD RAM 1 0 0 1 0 0 0 0 1 1
LCOME C
Write “C \". The cursor incremented by one and shifted the right.
12 ••••• • • Write \" Y \" . The cursor is
Write data to CG RAM / DD RAM incremented by one and shifted COMPAMY 13
to the right. 1 0 0 1 0 11 0 0 1 Only shift the cursor's position to Cursor Or Display Shift
COMPAMY 14 the left (Y). 0 0 0 0 0 10 0 X X15 16 17 18
cursor or display shift
0 0 0 0 0 11 0 0 1 0 00 0 0 0 0 10 0 0 0 0 10 0 X X1 1 1 01 1 X X0 1 X XWrite data to CG RAM / DD RAM
cursor or display shift cursor or display shift Write data to CG RAM / DD RAM
COMPAMY
OMPANY
COMPANY
COMPANY
OMPANY
Only shift the cursor's position to the left (M).
Write “N \". The display moves to the left.
Shift the display and the cursor's position to the right.
Shift the display and the cursor's position to the right.
4-Bit operation and 8-digit 1-line display (using internal reset)
NoInstruction Display Operation 1 Power on . ( SPLC780A1 starts initializing )
Function set
2 RS R/W D7 D6 D5 D4
0 0 0 0 1 0 Function set 3 4 5
0 0 0 0 1 0 0 0 0 0 X X _ Display on / off control 0 0 0 0 0 0 0 1 1 1 0 0 _ Entry mode set 0 0 0 0 0 0 0 0 1 1 0 0 6
Write data to CG RAM / DD RAM
W_
1 0 0 1 0 1 1 0 0 1 1 1 Write “W “. The cursor is incremented by one and shifted to the right.
Increase address by one. It will shift the cursor to the right when writing to the DD RAM / CG RAM. Now the display has no shift. Power on reset. No display. Set to 4-bit operation
Write \" \" (space). The cursor is
19 incremented by one and shifted
1 0 0 1 0 00 0 0 0totheright 20 ••••• • • Both the display and the cursor return home
WELCOME return to the original position 21
0 0 0 0 0 0 0 0 1 0 (address0).Set to 4-bit operation and select 1-line display line and character font.
Display on. Cursor appears.
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SC802A VER2.1
Reset function
At power on, it starts the internal auto-reset circuit and executes the initial instructions . There are the initial procedures shown as bellows:
8bits interface Power on Waite time > 15ms after VDD>4.5V RS R/W D7 D6 D5 D4 D3 D2 D1 D0BF cannot be checked before this instruction 0 0 0 0 1 1 X X X XFunction set (interface is 8 bits length). Wait time > 4.1ms RS R/W D7 D6 D5 D4 D3 D2 D1 D0BF cannot be checked before this instruction 0 0 0 0 1 1 X X X XFunction set (interface is 8 bits length). Wait time > 100us RS R/W D7 D6 D5 D4 D3 D2 D1 D0BF cannot be checked before this instruction 0 0 0 0 1 1 X X X XFunction set (interface is 8 bits length). RS R/W D7 D6 D5 D4 D3 D2 D1 D0 BF cannot be checked after the following 0 0 0 0 1 1 N F X X Instructions 0 0 0 0 0 0 1 0 0 0 Function set (interface is 8 bits length. specify0 0 0 0 0 0 0 0 0 1 The number of display lines and character 0 0 0 0 0 0 0 1 I/D S Font .) Thenumber of display lines and character cannot be changed afterwards. Display off Display clear Entry mode set Initialization end
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SC802A VER2.1
Power on 4bits interface
Waite time > 15ms after VDD>4.5VRS R/W D7 D6 D5 D4 0 0 0 0 1 1 BF cannot be checked before this instructionFunction set (interface is 8 bits length). Wait time > 4.1msRS R/W D7 D6 D5 D4 0 0 0 0 1 1 BF cannot be checked before this instructionFunction set (interface is 8 bits length). Wait time > 100usRS R/W D7 D6 D5 D4 0 0 0 0 1 1 BF cannot be checked before this instructionFunction set (interface is 8 bits length). RS R/W D7 D6 D5 D4 0 0 0 0 1 0 0 0 0 0 1 0 0 0 N F X X 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 1 I/D S BF cannot be checked after the following Instructions Function set (set interface to be 4 bits length)Interface 8 bits length Function set (interface is 8 bits length. specifyThe number of display lines and character Font.) Thenumber of display lines and character cannot be changed afterwards. Display off Display clear Entry mode setInitialization end Akihabara Inc. www.akiba-tech.com Page 17 of 17
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