PCA85176 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 6 — 7 April 2015 7 of 60
NXP Semiconductors
PCA85176
40 x 4 automotive LCD driver for low multiplex rates
7. Functional description
The PCA85176 is a versatile peripheral device designed to interface between any
microcontroller to a wide variety of LCD segment or dot matrix displays. It can directly
drive any static or multiplexed LCD containing up to four backplanes and up to
40 segments.
7.1 Commands of PCA85176
The commands available to the PCA85176 are defined in Table 5.
All available commands carry a continuation bit C in their most significant bit position as
shown in Figure 22
. When this bit is set logic 1, it indicates that the next byte of the
transfer to arrive will also represent a command. If this bit is set logic 0, it indicates that
the command byte is the last in the transfer. Further bytes will be regarded as display data
(see Table 6
).
Table 5. Definition of PCA85176 commands
Bit position labeled as - is not used.
Command Operation Code Reference
Bit 7 6 5 4 3 2 1 0
mode-set C 1 0 - E B M[1:0] Table 7
load-data-pointer C 0 P[5:0] Table 8
device-select C1100A[2:0] Table 9
bank-select C 1 1 1 1 0 I O Table 10
blink-select C 1 1 1 0 AB BF[1:0] Table 11
Table 6. C bit description
Bit Symbol Value Description
7C continue bit
0 last control byte in the transfer; next byte will be regarded
as display data
1 control bytes continue; next byte will be a command too
