PCA8538UG(2014) View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
PCA8538UG Datasheet PDF : 107 Pages
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NXP Semiconductors
PCA8538
Automotive 102 x 9 Chip-On-Glass LCD segment driver
data pointer X wraps around to RAM column 0 while data pointer Y is set to logic 1 to fill
RAM row 8. From the next bytes sent, only the LSB (bit 0) is stored in RAM row 8. The 7
most significant data bits are discarded. In order to fill the whole RAM addresses 204
bytes need to be sent to the PCA8538 but any data bits that spill over the RAM and
additional data bytes sent are discarded.
Table 45. RAM filling in 1:9 multiplex drive mode
RAM row/
backplane
output
(COM)
RAM column/Segment output (S)
0
1
2
:
0
aa7
ab7
ac7
:
1
aa6
ab6
ac6
:
2
aa5
ab5
ac5
:
3
aa4
ab4
ac4
:
4
aa3
ab3
ac3
:
5
aa2
ab2
ac2
:
6
aa1
ab1
ac1
:
7
aa0
ab0
ac0
:
8
dy0
dz0
ea0
:
99
100
101
dv7
dw7
dx7
dv6
dw6
dx6
dv5
dw5
dx5
dv4
dw4
dx4
dv3
dw3
dx3
dv2
dw2
dx2
dv1
dw1
dx1
dv0
dw0
dx0
hi0
hj0
hk0
8.14.3 Bank selection
The PCA8538 includes a RAM bank switching feature in the static, 1:2, and 1:4 multiplex
drive modes. A bank can be thought of as a collection of RAM rows. The RAM bank
switching gives the provision for preparing display information in an alternative bank and
to be able to switch to it once it is complete. Figure 34 shows the location of the banks
relative to the RAM map.
PCA8538
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 4 — 26 September 2014
© NXP Semiconductors N.V. 2014. All rights reserved.
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