PCA8538UG(2014) View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
PCA8538UG Datasheet PDF : 107 Pages
| |||
NXP Semiconductors
PCA8538
Automotive 102 x 9 Chip-On-Glass LCD segment driver
8.11 Backplane outputs
The LCD drive section includes nine backplane outputs: COM0 to COM8. The backplanes
are double implemented to offer a higher flexibility for the glass layout.
The backplane output signals are generated based on the selected LCD multiplex drive
mode. Table 37 describes which outputs are active for each of the multiplex drive modes
and what signal is generated.
Table 37. Mapping of output pins and corresponding output signals with respect to the
multiplex driving mode
Multiplex Output pin
drive mode COM0 COM1 COM2 COM3 COM4 COM5 COM6 COM7 COM8
Signal
static
BP0 BP0 BP0 BP0 BP0 BP0 BP0 BP0 BP0
1:2
BP0 BP1 BP0 BP1 BP0 BP1 BP0 BP1 BP0
1:4
BP0 BP1 BP2 BP3 BP0 BP3 BP2 BP1 BP0
1:6
BP0 BP1 BP2 BP3 BP4 BP5 BP2 BP1 BP0
1:8
BP0 BP1 BP2 BP3 BP4 BP5 BP6 BP7 BP0
1:9
BP0 BP1 BP2 BP3 BP4 BP5 BP6 BP7 BP8
Table 38 describes the corresponding layout topology.
Table 38. Layout topology of output pins and corresponding output signals with respect to the multiplex driving
mode
Multiplex drive mode
Static
1:2
1:4
1:6
1:8
1:9
Signal On pin Signal On pin Signal On pin Signal On pin Signal On pin Signal On pin
BP0 COM0 BP0 COM0 BP0 COM0 BP0 COM0 BP0 COM0 BP0 COM0
COM1
COM2
COM4
COM8
COM8 BP1 COM1
COM2
COM4
COM8 BP1 COM1 BP1 COM1 BP2 COM2
COM3
COM6 BP1 COM1
COM7 BP2 COM2 BP3 COM3
COM4
COM8
COM7 BP2 COM2 BP3 COM3 BP4 COM4
COM5 BP1 COM1 BP2 COM2
COM6 BP4 COM4 BP5 COM5
COM6
COM3
COM6 BP3 COM3 BP5 COM5 BP6 COM6
COM7
COM5 BP3 COM3 BP4 COM4 BP6 COM6 BP7 COM7
COM8
COM7
COM5 BP5 COM5 BP7 COM7 BP8 COM8
8.11.1 Driving strength on the backplanes
Corresponding output pins (COMx), which are carrying the same signal (BPx), may
optionally be connected to the display. This allows gaining a higher driving strength. If not
required, the unused pins can be left open-circuit.
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.
54 of 107
Share Link: 