PCA85276 All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2015. All rights reserved.
Product data sheet Rev. 2 — 9 April 2015 6 of 55
NXP Semiconductors
PCA85276
Automotive 40 x 4 LCD driver
7. Functional description
The PCA85276 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 PCA85276
The commands available to the PCA85276 are defined in Table 5.
All available commands carry a continuation bit C in their most significant bit position as
shown in Figure 21
. 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 are regarded as display data
(see Table 6
).
Table 5. Definition of the PCA85276 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 C11000A[1:0] 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
