PCA9620_11 datasheet(8/81 Pages) NXP

Part #	PCA9620

Description	60 x 8 LCD high-drive segment driver for automotive and industrial

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Manufacturer	NXP [NXP Semiconductors]

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PCA9620

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Product data sheet

Rev. 3 — 3 July 2013

8 of 81

NXP Semiconductors

PCA9620

60 x 8 LCD high-drive segment driver for automotive and industrial

8.1.2 Command: OTP-refresh

In order to achieve the specified accuracy of VLCD, the frame frequency, and the

temperature measurement, each IC is calibrated during production and testing of the

device. This calibration is performed on EPROM cells called One Time Programmable

(OTP) cells. These cells are read by the device at power-on, after a reset, and every time

when the initialize command or the OTP-refresh command is sent. This command will

take approximately 10 ms to finish.

8.1.3 Command: oscillator-ctrl

The oscillator-ctrl command switches between internal and external oscillator and enables

or disables pin CLK.

[1]

Default value.

Table 6.

Initialize - initialize command bit description

Bit

Symbol

Value

Description

7 to 0

-

00111010

fixed value

Table 7.

OTP-refresh - OTP-refresh command bit description

Bit

Symbol

Value

Description

7 to 0

-

11010000

fixed value

Table 8.

Oscillator-ctrl - oscillator control command bit description

For further information, see Section 8.5 on page 40.

Bit

Symbol

Value

Description

7 to 2

-

110011

fixed value

1

COE

control pin CLK

0[1]

clock signal not available on pin CLK;

pin CLK is in 3-state and may be left floating

1

clock signal available on pin CLK

0

OSC

oscillator source

0[1]

internal oscillator running

1

external oscillator used;

pin CLK becomes an input

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