HD61604/HD61605
1270
Pin Functions
Table 1 shows the HD61604 pin description. Table 2 shows the HD61605 pin description.
HD61604 Pin Function
READY (Ready):
During data setting in the display data RAM and mode setting latch in the LSI after
data transfer, low is output to the READY pin to inhibit the next data input.
There are two modes: one in which low is output only when both of
&6
and
5(
are low, and the other in
which low is output regardless of
&6
and
5(
.
&6
(Chip Select):
Chip select input. Data can be written only when this pin is low.
:(
(Write Enable):
Write enable input. Input data of D0 to D7 is latched at the positive edge of
:(
.
5(
(Reset):
Resets the input data byte counter. After both of
&6
and
5(
are low, the first data is
recognized as the 1st byte data.
SB (Standby):
High level input stops the LSI operations.
1. Stops oscillation and clock input.
2. Stops LCD driver.
3. Stops writing data into display RAM.
D0–D7 (Data Bus):
Data input pin from which 8-bit
×
2-byte data is input.
SYNC (Synchronous):
Synchronous input for 2 or more chip applications. LCD drive timing generator is
reset by high input. LCD is off.
COM0–COM3 (Common):
LCD common (backplate) drive output.
SEG0–SEG50 (Segment):
LCD segment drive output.
V1, V2, V3 (LCD Voltage):
Power supply for LCD drive.
OSC1, OSC2 (Oscillator):
Attach external R to these pins for oscillation. An external clock (100 kHz)
can be input from OSC1.
VC1, VC2:
Do not connect any wire.
VREF1:
Connect this pin to V1 pin.
VREF2:
Hold at VDD level.
VDD:
Positive power supply.
VSS:
Negative power supply.