as2591 austriamicrosystems, as2591 Datasheet - Page 2

• Manufacturer Part Number: as2591
• Description: 16-digit Lcd Driver Cmos Integrated Circuit
• Manufacturer: austriamicrosystems

Preliminary
Pin Description
Continues…
Rev. 1.0
Pin #
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
XTAL1
XTAL2
S2_10
S1_10
S2_11
S1_11
S2_12
S1_12
S2_13
S1_13
S2_14
S1_14
S2_15
S1_15
COM1
COM2
COM3
COM4
Name
SCLK
V
CS
V
V
DI
LCD
DD
SS
Supply
Supply
Type
AO
AO
DI
DI
DI
AI
Description
Segment Outputs
Output pins for driving segments of LCD.
Chip Select
Chip select signal from CPU (e.g. AS2525).
Data Input
Data input pin for serial interface.
Serial Clock Input
Clock input pin for serial interface.
Positive Voltage Supply
This pin is the positive power supply for the device.
Negative Voltage Supply
This pin is the negative power supply for the device.
Oscillator Pins
Oscillator pins for connection of a 32.768 kHz crystal.
LCD Reference Voltage
This is the input pin for setting the internal LCD reference voltage (see
also Figure 4: Supply arrangement).
Backplane Outputs
Ouput pins for driving backplanes of LCD.
Page 2
AS2591
May 1999