PCA2117DUGSSLASHDA datasheet(10/107 Pages) NXP

10 / 107 page

PCA2117

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Product data sheet

Rev. 4 — 8 April 2015

10 of 107

NXP Semiconductors

PCA2117

Automotive LCD driver for character displays

8.1.1.3

Command: Clear_reset_flag

The Clear_reset_flag command clears the reset flag CRF, see Table 12 on page 11.

8.1.1.4

Command: OTP_refresh

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

temperature measurement, each IC is calibrated during production. These calibration

values are stored in One Time Programmable (OTP) cells. Their content is loaded into the

associated registers every time when the Initialize command or the OTP_refresh

command is sent. This command takes approximately 10 ms to finish.

8.1.1.5

Command: Clock_out_ctrl

When pin CLK is configured as an output pin, the Clock_out_ctrl command enables or

disables the clock output on pin CLK.

[1]

Default value.

For lower power consumption, the clock is only active when display (see Table 25),

charge pump (see Table 30), or temperature measurement (see Table 32) is enabled.

Table 7.

Initialize - Initialize command bit description

Bit

Symbol

Value

Description

-R/W

fixed value

RS[1:0]

fixed value

7 to 0

00000001

initialize

Table 8.

Clear_reset_flag - Clear_reset_flag command bit description

Bit

Symbol

Value

Description

-R/W

fixed value

RS[1:0]

fixed value

7 to 0

00011111

clear reset status flag

Table 9.

OTP_refresh - OTP_refresh command bit description

Bit

Symbol

Value

Description

-R/W

fixed value

RS[1:0]

fixed value

7 to 0

00000010

refresh register settings from OTP

Table 10.

Clock_out_ctrl - CLK pin input/output switch command bit description

Bit

Symbol

Value

Description

-R/W

fixed value

RS[1:0]

fixed value

7 to 1

0010000

fixed value

0COE

CLK pin setting

0[1]

clock signal not available on pin CLK;

pin CLK is in 3-state

clock signal available on pin CLK

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