HD66137 Datasheet, PDF (6/19 Pages) Hitachi Semiconductor – High-Voltage Durable 240-Channel Common Driver for Dot-Matrix STN LCD

HD66137T
Pin Functions (cont)
Classification Symbol
Control signal MODE0
MODE1
Connected
Pin No. to
I/O
256
—
256
Input
DIO1
246
Extension I/O
DIO2
265
driver or
MPU
CCL
248
MPU
Input
AMP
252
—
Input
RESET 263
MPU or V_CC Input
DISPOFF 253
M/S
247
MPU
—
Input
Input
Function
Switch terminals for the number of LCD drive
output pins.
MODE0 MODE1 Shift direction
"H" "H" 240 - output (X1, X2, X3......X238, X239, X240)
"H" "L" 200 - output (X21, X22, X23......X218, X219, X220)
"L" "H" 160 - output (X41, X42, X43......X198, X199, X200)
"L" "L" Prohibited
Serial data input output pin
SHL
"H" level
"L" level
DIO1
serial output pin
seiral input pin
DIO2
serial input pin
seiral output pin
Built-in switching circuit clock input. When
use built-in switching circuit and generate V_EE,
this pin connect CL pin.
If built-in switching circuit is not used, CCL
must be fixed to GND
Built-in swiching circuit on-off control.
When use built-in switching circuit, this pin
must be fixed to V_CC.
If built-in switching circuit is not used, this pin
must be fixed to GND
Setting this pin to GND sets initializes the
alternating signal (M signal) circuit. A V_CC
level RESET is normally used.
Setting this pin to GND sets LCD drive output
X1 to X240 to the VM level.
Controls the display-off function, and display-
off signal output from DOC pin.
DOC
254
—
"H" level When DISPOFF is Low level, X1-240 set VM level
"L" level Until serial data input 16 times X1-X240 set VM level
Output
"H" level When DISPOFF is Low level, output low level
When DISPOFF is High level, output High level
"L" level Until serial data input 16 times output low level
from DOC pin
DISPOFF
DIO1,2
DOC
1 2 3 4 5 141516
When using M/S is low level, DOC pin should
be connect to SEG LSI Dispoff control pin.
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