HD66137 Datasheet, PDF (5/19 Pages) Hitachi Semiconductor – High-Voltage Durable 240-Channel Common Driver for Dot-Matrix STN LCD

HD66137T
Pin Function
Connected
Classification Symbol Pin No. to
I/O
Power supply VLCDL, R 273, 241 Power
—
VEEL, R 269, 245 supply
V_CC,
257
GND
250
VHL, R
VLL, R
VML, R
272, 242 Power
270, 244 supply
271, 243
Input
VEO
268
VEEL, R
output
C1, C2 267, 266 Capacitance —
Control signal CL
249
M
264
MWS0 258
MWS1 259
MWS2 260
MWS3 261
MWS4 262
MPU
Input
Extension
driver or
MPU
—
I/O
Input
Functions
VLCDL, R–VEEL, R : Power supply for LCD
drive
VLCDL, R : Power supply for switch circuit
V_CC–GND : Power supply for logic circuit
Power supply for LCD drive level
VHL, R : Selected level (Set to the same
voltage as VLCDL, R.)
VLL, R : Selected level (Set to the same
voltage as VEEL, R.)
VML, R : Non-selected level and Power
supply for switch circuit
When use built -in switching circuit and
generate VEE, VEO pin connect to VEEL, R
pins. VM voltage is point of reference and
reversed and output the voltage input to the
voltage between VLCD and VM. If built-in
switching circuit is not used, don't connect
any lines to this pin.
External capacitance should be connected
here when using the switch circuit for
generate VEE.
If built-in switching circuit is not used, don't
connect any lines to this pin.
Shift clock input. Data is shifted at the falling
edge of shift clock CL of the shift register.
Inputs or outputs the alternating current for
LCD drive output.
This pin specifies the cycle of the alternating
signal (M signal) in the unit of the number of
lines. The number of lines, which is an
integer from 2 to 31, is specified as follows.
Usually, specify the number of lines within a
range from 10 to 31. When the HD66131T is
driven by an external alternating signal,
specify the number of lines as zero.
Number
of lines
MWS4
MWS3
MWS2
MWS1
MWS0
Line alternating
waveform
M-pin status
0
0 0 0 0 0 ——
Input
1
0 0 0 0 1 Prohibited
Output
2
0 0 0 1 0 2 lines alternated
3
0 0 0 1 1 3 lines alternated
••
•• •• •• •• ••
••
31 1 1 1 1 1 31 lines alternated
5