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
8.3 Charge pump and LCD bias control commands
8.3.1 Command: Charge-pump-ctrl
The Charge-pump-ctrl command enables or disables the internal VLCD generation and
controls the charge pump voltage multiplier settings.
Table 14. Charge-pump-ctrl - charge pump control command bit description
Bit
Symbol
Value
Description
-
R/W
0
fixed value
-
RS[1:0]
00
fixed value
7 to 4 -
1100
fixed value
3
CPE
charge pump status
2 to 0 CPC[2:0]
0[1]
charge pump disabled;
no internal VLCD generation;
external supply of VLCD
1
charge pump enabled;
internal VLCD generation;
no external supply of VLCD
charge pump voltage multiplier setting
000[1]
001
010
011
100 to 111
VLCD = 2 VDD2
VLCD = 3 VDD2
VLCD = 4 VDD2
VLCD = 5 VDD2
VLCD = VDD2 (direct mode)
[1] Default value.
8.3.2 Command: Set-VLCD
The Set-VLCD command allows setting the LCD voltage.
Table 15. Set-VLCD - Set-VLCD command bit description
Bit
Symbol
Value
Description
Set-VLCD-MSB
-
R/W
0
fixed value
-
RS[1:0]
00
fixed value
7 to 5 -
010
fixed value
4 to 0 V[8:4]
00000[1] to
11111
set VLCD MSB
the 5 most significant bits of V[8:0]
Set-VLCD-LSB
-
R/W
0
fixed value
-
RS[1:0]
00
fixed value
7 to 4 -
0110
fixed value
3 to 0 V[3:0]
set VLCD LSB
0000[1] to 1111 the 4 least significant bits of V[8:0]
[1] Default value.
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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