PCA85132
LCD driver for low multiplex rates
Rev. 4 — 9 April 2015
Product data sheet
1. General description
The PCA85132 is a peripheral device which interfaces to almost any Liquid Crystal
Display (LCD)
1
with low multiplex rates. It generates the drive signals for any static or
multiplexed LCD containing up to four backplanes and up to 160 segments. It can easily
be cascaded for larger LCD applications. The PCA85132 is compatible with most
microcontrollers and communicates via the two-line bidirectional I
2
C-bus. Communication
overheads are minimized by a display RAM with auto-incremental addressing, by
hardware subaddressing, and by display memory switching (static and duplex drive
modes).
For a selection of NXP LCD segment drivers, see
Table 30 on page 56.
2. Features and benefits
AEC-Q100 compliant for automotive applications
Single-chip LCD controller and driver for up to 640 elements
Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing
160 segment drives:
Up to 80 7-segment numeric characters
Up to 40 14-segment alphanumeric characters
Any graphics of up to 640 elements
May be cascaded for large LCD applications (up to 5120 elements possible)
160
4-bit RAM for display data storage
Software programmable frame frequency in steps of 5 Hz in the range of 60 Hz to
90 Hz; factory calibrated
Wide LCD supply range: from 1.8 V for low threshold LCDs and up to 8.0 V for
guest-host LCDs and high threshold (automobile) twisted nematic LCDs
Internal LCD bias generation with voltage-follower buffers
Selectable display bias configuration: static,
1
⁄
2
, or
1
⁄
3
Wide power supply range: from 1.8 V to 5.5 V
LCD and logic supplies may be separated
Low power consumption, typical: I
DD
= 4
A,
I
DD(LCD)
= 30
A
400 kHz I
2
C-bus interface
Auto-incremental display data loading across device subaddress boundaries
Versatile blinking modes
Compatible with Chip-On-Glass (COG) technology
No external components required
1.
The definition of the abbreviations and acronyms used in this data sheet can be found in
Section 19 on page 58.
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx
xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx
xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx
Product data sheet
Rev. 4 — 9 April 2015
4 of 65
PCA85132
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2015. All rights reserved.
NXP Semiconductors
6. Pinning information
6.1 Pinning
LCD driver for low multiplex rates
PCA85132
Viewed from active side. For mechanical details, see
Figure 37 on page 49.
Fig 2.
Pinning diagram of PCA85132
NXP Semiconductors
PCA85132
LCD driver for low multiplex rates
6.2 Pin description
Table 4.
Pin description
Input or input/output pins must always be at a defined level (V
SS
or V
DD
) unless otherwise specified.
Symbol
SDAACK
[1]
SDA
[1]
SCL
CLK
V
DD
SYNC
OSC
T1, T2, and T3
A0 and A1
SA0
V
SS[2]
V
LCD
BP2 and BP0
S0 to S79
BP0, BP2, BP1, and BP3
S80 to S159
BP3 and BP1
[1]
[2]
Pin
1 to 3
4 to 6
7 to 9
10
11 to 13
14
15
16, 17, and 18 to 20
21, 22
23
24 to 26
27 to 29
30, 31
32 to 111
112 to 115
116 to 195
196, 197
Description
I
2
C-bus acknowledge output
I
2
C-bus serial data input
I
2
C-bus serial clock input
clock input and output
supply voltage
cascade synchronization input and output
selection of internal or external clock
dedicated testing pins; to be tied to V
SS
in
application mode
subaddress inputs
I
2
C-bus slave address input
ground supply voltage
LCD supply voltage
LCD backplane outputs
LCD segment outputs
LCD backplane outputs
LCD segment outputs
LCD backplane outputs
For most applications SDA and SDAACK are shorted together (see
Section 14.3 on page 44).
The substrate (rear side of the die) is connected to V
SS
and should be electrically isolated.
PCA85132
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet
Rev. 4 — 9 April 2015
5 of 65
DIY/Open Source Hardware
京公网安备 11010802033920号
EEWORLD
