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austriamicrosystems AG

AS1120 Datasheet Preview

AS1120 Datasheet

46-Segment LCD Driver

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AS1120
46-Segment LCD Driver
www.DataSheet4U.com
Datasheet
1 General Description
The AS1120 is an LCD direct-driver capable of driving
up to 46 LCD segments with one non-multiplexed back-
plane.
The device contains an integrated serial-to-parallel inter-
face and generates the necessary signals to drive LCD
panels.
Internal synchronous backplane signal regeneration
allows the device to mix different drivers with different
LCDs for superior brightness stability over a wide tem-
perature range. The device also supports external back-
plane signals.
The AS1120 was specifically designed to easily inter-
face with a variety of microprocessors and a wide range
of LCD panel types.
The AS1120 is available in a 64-pin LQFP package.
2 Key Features
! 46-Segment LCD Driver
! Serial-to-Parallel Interface
! Integrated Oscillator w/ External R/C and Backplane
Input
! Supports Alphanumeric and Bar-Graph Devices
! Two Data Transfer Configurations:
- Cascade
- Parallel
! Non-Multiplexed Backplane
! Very-Low Current Consumption
! Power Supply Range: -0.3 to +7.0V
! Operating Temperature Range: -40 to +85ÂșC
! 64-pin LQFP Package
Figure 1. Application Diagram
3 Applications
The device is ideal for industrial LCD systems, portable-
system displays, panel meters with wide temperature
ranges, high-performance optical displays, or for any
other space-limited A/D application with low power-con-
sumption and single-supply requirements.
+VDD
REXT
CEXT
43
VDD
6
TEST
9
LOAD
13
RESETN
10
DATAIN
8
CLKIN
11
BPLIN
15
OSC
AS1120
XOR
46-bit
Register
46-bit
Shift Register
46-bit
OSC
Divide by
16
LCD[0:45]
7
DATAOUT
12
BPLOUT
42
VSS
14
VSSOSC
www.austriamicrosystems.com
Revision 1.05
1 - 13




austriamicrosystems AG

AS1120 Datasheet Preview

AS1120 Datasheet

46-Segment LCD Driver

No Preview Available !

AS1120
Datasheet - Pinout and Packaging
4 Pinout and Packaging
Pin Assignments and Markings
Figure 2. Pin Assignments (Top View) and Markings
N/C 1
LCD42 2
LCD43 3
LCD44 4
LCD45 5
TEST 6
DATAOUT 7
CLKIN 8
LOAD 9
DATAIN 10
BPLIN 11
BPLOUT 12
RESETN 13
VSSOSC 14
OSC 15
N/C 16
AS1120
www.DataSheet4U.com
48 N/C
47 LCD26
46 LCD25
45 LCD24
44 LCD23
43 VDD
42 VSS
41 LCD22
40 LCD21
39 LCD20
38 LCD19
37 LCD18
36 LCD17
35 LCD16
34 LCD15
33 N/C
Pin Descriptions
Table 1. Pin Descriptions
Pin Number
Pin Name
1, 16, 32, 33, 48, 49
N/C
2:5 LCD42:LCD45
6 TEST
7 DATAOUT
8 CLKIN
9 LOAD
10 DATAIN
11 BPLIN
12 BPLOUT
13 RESETN
14 VSSOSC
15 OSC
17:31
34:41
42
43
44:47
50:64
LCD0:LCD14
LCD15:LCD22
VSS
VDD
LCD23:LCD26
LCD27:LCD41
Description
Not Connected
LCD Output Segments 42:45
Test pin. This pin must be tied to pin VDD.
Serial Data Output
Shift Register Clock
Load Strobe from Shift Register to Latch
Serial Data Input
Backplane Input
Backplane Output
Active-Low Asynchronous Reset
Internal Oscillator Power Ground
Oscillator Pad.
a). Internal clock (see page 8)
b) External clock; tied to VSSOSC
LCD Output Segments 0:14
LCD Output Segments 15:22
Power Ground
Positive Power Supply
LCD Output Segments 23:26
LCD Output Segments 27:41
www.austriamicrosystems.com
Revision 1.05
2 - 13


Part Number AS1120
Description 46-Segment LCD Driver
Maker austriamicrosystems AG
Total Page 13 Pages
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