Specifications

EPSON 2–5
SED1200 Series
SED1200
Series
PIN DESCRIPTION
CPU Interface
CS Active low chip select input.
RD Active low read enable input.
WR Active low write strobe.
A0 Selects between instruction and display data
access.
A0 = H: Display data
A0 = L: Instruction
D0–D2 Active high CPU data inputs.
D3 Active high CPU data input/output.
Φ Clock input for command execution.
LCD Interface
COM1–COM16 LCD common driver outputs.
SEG1–SEG50 LCD segment driver outputs.
COMMAND DESCRIPTION
Command Summary
TABLE 2. SED1200 Command Summary
Oscillator
OSC1, OSC2 Terminals for the oscillator external
feedback resistor, R
f. If an externally
generated clock is used, it is
connected to OSC1; OSC2 is left
open.
Power Supply
VDD Logic power supply
VLCD LCD power supply
V
SS System ground (0 V).
COMMAND NAME CS WR RD A0 D7 D6 D5 D4 D3 D2 D1 D0 REMARKS
SET CURSOR
00100000010 D/I
D0 = 1 ... Decrement
DIRECTION D0 = 0 ... Increment
CURSOR ADDRESS
00100000011 –1/+1
D0 = 1 ... Cursor address –1
–1/+1 D0 = 0 ... Cursor address +1
CURSOR FONT
00100000100 A/U
D0 = 1 ... All dots blinking
SELECT D0 = 0 ... Underline
CURSOR BLINK
00100000101ON/OFF
D0 = 1 ... ON
ON/OFF D0 = 0 ... OFF
DISPLAY ON/OFF 0 0 100000110ON/OFF
D0 = 1 ... ON
D0 = 0 ... OFF
CURSOR ON/OFF 0 0 100000111ON/OFF
D0 = 1 ... ON
D0 = 0 ... OFF
SYSTEM RESET 0 0 100001000 0 Data RAM & CGRAM are not affected
LINE SELECT 0 0 100001001 2/1
D0 =1 ... 2 line display (1/16 duty)
D0 = 0 ... 1 line display (1/8 duty)
SET CGRAM
00100010 (LOWER ADDRESS) Upper address fixed at 0H
ADDRESS
SET CGRAM DATA 0 0 10010 (CGRAM DATA)
SET CURSOR
0 0 1 0 1 2nd/1st (N DIGIT-1)
D6 = 1 ... 2nd line N digit address
ADDRESS D6 = 0 ... 1st line N digit address
SET CHARACTER
0 0 1 1 (CHARACTER CODE)
CODE
BUSY FLAG CHECK 0 1 0 0 BF * * * BF * * * High impedance