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PCA9620 Arkusz danych(PDF) 7 Page - NXP Semiconductors |
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PCA9620 Arkusz danych(HTML) 7 Page - NXP Semiconductors |
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7 / 71 page ![]() PCA9620 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 1 — 9 December 2010 7 of 71 NXP Semiconductors PCA9620 Universal LCD driver for low multiplex rates 7.1.4 Command: charge-pump-ctrl The charge-pump-ctrl command enables or disables the internal VLCD generation and controls the charge pump voltage multiplier setting. [1] Default value. 7.1.5 Command: temp-msr-ctrl The temp-msr-ctrl command enables or disables the temperature measurement block and the temperature compensation of VLCD. [1] Default value. 7.1.6 Command: set-VPR-MSB and set-VPR-LSB With these two instructions it is possible to set the target VLCD voltage for the internal charge pump, see Section 7.4.3 on page 31. [1] Default value. Table 8. Charge-pump-ctrl - charge pump control command bit description Bit Symbol Value Description 7 to 2 - 110000 fixed value 1 CPE charge pump switch 0[1] charge pump disabled; no internal VLCD generation; external supply of VLCD 1 charge pump enabled 0 CPC charge pump voltage multiplier setting 0[1] VLCD = 2 × VDD2 1VLCD = 3 × VDD2 Table 9. Temp-msr-ctrl - temperature measurement control command bit description For further information, see Section 7.4.8 on page 36. Bit Symbol Value Description 7 to 2 - 110010 fixed value 1 TCE temperature compensation switch 0 no temperature compensation of VLCD possible 1[1] temperature compensation of VLCD possible 0 TME temperature measurement switch 0 temperature measurement disabled; no temperature readout possible 1[1] temperature measurement enabled; temperature readout possible Table 10. 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] |
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