PCA9620_11 Datasheet, PDF (9/81 Pages) NXP Semiconductors – 60 x 8 LCD high-drive segment driver for automotive and industrial

NXP Semiconductors
PCA9620
60 x 8 LCD high-drive segment driver for automotive and industrial
8.1.4 Command: charge-pump-ctrl
The charge-pump-ctrl command enables or disables the internal V_LCD generation and
controls the charge pump voltage multiplier setting.
Table 9. Charge-pump-ctrl - charge pump control command bit description
Bit
Symbol
Value
Description
7 to 2 -
1100 00
fixed value
1
CPE
charge pump switch
0^[1]
charge pump disabled;
no internal V_LCD generation;
external supply of V_LCD
1
charge pump enabled
0
CPC
charge pump voltage multiplier setting
0^[1]
V_LCD = 2  V_DD2
1
V_LCD = 3  V_DD2
[1] Default value.
8.1.5 Command: temp-msr-ctrl
The temp-msr-ctrl command enables or disables the temperature measurement block and
the temperature compensation of V_LCD.
Table 10. Temp-msr-ctrl - temperature measurement control command bit description
For further information, see Section 8.4.8 on page 38.
Bit
Symbol
Value
Description
7 to 2 -
1100 10
fixed value
1
TCE
temperature compensation switch
0
no temperature compensation of V_LCD
possible
0
TME
1^[1]
temperature compensation of V_LCD possible
temperature measurement switch
0
temperature measurement disabled;
no temperature readout possible
1^[1]
temperature measurement enabled;
temperature readout possible
[1] Default value.
8.1.6 Command: set-VPR-MSB and set-VPR-LSB
With these two instructions, it is possible to set the target V_LCD voltage for the internal
charge pump, see Section 8.4.3 on page 33.
Table 11. Set-VPR-MSB - set VPR MSB command bit description
Bit
Symbol
Value
Description
7 to 4 -
0100
fixed value
3 to 0 VPR[7:4]
0000^[1] to 1111 the four most significant bits of VPR[7:0]
[1] Default value.
PCA9620
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 3 — 3 July 2013
© NXP B.V. 2013. All rights reserved.
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