PCA9620 datasheet(5/71 Pages) NXP

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PCA9620

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Product data sheet

Rev. 1 — 9 December 2010

5 of 71

NXP Semiconductors

PCA9620

Universal LCD driver for low multiplex rates

Functional description

The PCA9620 is a versatile peripheral device designed to interface any microprocessor or

microcontroller to a wide variety of LCDs. It can directly drive any static or multiplexed

LCD containing up to 480 elements.

7.1 Commands of PCA9620

The PCA9620 is controlled by 22 commands, which are defined in Table 4. Any other

combinations of operation code bits that are not mentioned in this document may lead to

undesired operation modes of PCA9620.

7.1.1 Command: initialize

This command generates a chip wide reset which resets all command values to their

default values (see Table 25 on page 15). It must be sent to the PCA9620 after power-on.

After this command is sent, it is possible to send additional commands without the need to

re-initialize the interface. Reset takes 100 ns to complete.

For further information see Section 7.3 on page 14.

Table 4.

Commands of PCA9620

Command name

Bits

Reference

initialize

00111010

Section 7.1.1

OTP-refresh

11010000

Section 7.1.2

oscillator-ctrl

110011COE

OSC

Section 7.1.3

charge-pump-ctrl

110000CPE

CPC

Section 7.1.4

temp-msr-ctrl

110010TCE

TME

Section 7.1.5

temp-comp-SLA

00011SLA[2:0]

Table 29

temp-comp-SLB

00100SLB[2:0]

temp-comp-SLC

00101SLC[2:0]

temp-comp-SLD

00110SLD[2:0]

set-VPR-MSB

0100VPR[7:4]

Section 7.1.6

set-VPR-LSB

0101VPR[3:0]

display-enable

0011100E

Section 7.1.7

set-MUX-mode

00000M[2:0]

Section 7.1.8

set-bias-mode

110001B[1:0]

Section 7.1.9

load-data-pointer

P[5:0]

Section 7.1.10

frame-frequency

011F[4:0]

Section 7.1.11

input-bank-select

00001IB[2:0]

Section 7.1.12.1

output-bank-select

00010OB[2:0]

write-RAM-data

B[7:0]

Section 7.1.13

temp-read

TD[7:0]

Section 7.1.14,

Section 7.4.7

invmode_CPF_ctrl

110101LF

CPF

Section 7.1.15

temp-filter

1101001TFE

Section 7.1.16

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