PCA8536_11 Datasheet, PDF (16/74 Pages) NXP Semiconductors – Automotive LCD driver for low multiplex rates including a 6 channel PWM generator

NXP Semiconductors
PCA8536
Automotive LCD low multiplex driver with 6 channel PWM generator
Table 17. GPMO mode definition
GPM0[1:0] to GPM5[1:0]
Mode
00^[1], 01
LCD
10
static
11
PWM
[1] Default value.
Description
output is an LCD segment
output is static GPO
output is PWM GPO
8.1.7 Command: set-MUX-mode
The multiplex drive mode is configured with the bits described in Table 18.
Table 18. Set-MUX-mode - set multiplex drive mode command bit description
Bit
Symbol
Value
Description
7 to 2 -
0000 00
fixed value
1 to 0 M[1:0]
00^[1], 01
1:8 multiplex drive mode; eight backplanes
10
1:6 multiplex drive mode; 6 backplanes
11
1:4 multiplex drive mode; 4 backplanes
[1] Default value.
8.1.8 Command: set-bias-mode
The set-bias-mode command allows setting the bias level.
Table 19. Set-bias-mode - set bias mode command bit description
Bit
Symbol
Value
Description
7 to 2 -
0000 01
fixed value
1 to 0 B[1:0]
00^[1]. 01
11
10
1_{⁄4 bias}
1_{⁄3 bias}
1_{⁄2 bias}
[1] Default value.
8.1.9 Command: frame-frequency-LCD
With the frame-frequency-LCD command, the frame frequency for the display can be
configured. The clock frequency determines the frame frequency.
Table 20. Frame-frequency-LCD - frame frequency and output clock frequency command
bit description
Bit
Symbol
Value
Description
7 to 5 -
001
fixed value
4 to 0 FD[4:0]
see Table 21 frequency prescaler
The system is designed for a 230 kHz clock. It is either internally generated or externally
provided. Alternatively a 9.6 kHz clock signal can be provided as well. The EFR bit (see
Table 10) has to be set according to the external clock frequency.
When EFR is set to 9.6 kHz, then the LCD frame frequency is calculated with Equation 1:
f_{frLCD}
=
-^f-^c---^l-^k---^--^e--^x--^t--^
48
(1)
PCA8536
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 21 February 2012
© NXP B.V. 2012. All rights reserved.
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