PCA8538UG(2014) 查看數據表（PDF） - NXP Semiconductors.

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PCA8538UG
(Rev.:2014)

Automotive 102 x 9 Chip-On-Glass LCD segment driver

NXP Semiconductors. 

NXP Semiconductors

PCA8538

Automotive 102 x 9 Chip-On-Glass LCD segment driver

8.2.6 Command: Read-select

The Read-select command allows choosing to readout the temperature or the device

status.

Table 11. Read-select - status read select command bit description

Bit

Symbol

Value

Description

-

R/W

0

fixed value

-

RS[1:0]

00

fixed value

7 to 1 -

0001110

fixed value

0

SO

readout

0[1]

temperature;

the Status-readout command allows to

readout the temperature TD[7:0], see

Table 12

1

device status:

the Status-readout command allows to

readout some information about the status of

the device, see Table 12

[1] Default value.

8.2.7 Command: Status-readout

The Status-readout command offers to readout some status bits of the PCA8538. These

bits indicate the status of the device at the moment of reading.

Table 12. Status-readout - status and temperature read command bit description

For this command, bit R/W has to be set logic 1.

Bit

Symbol

Value

Description

-

R/W

1

fixed value

-

RS[1:0]

00

fixed value

Temperature readout if SO = 0 (see Table 11)

7 to 0 TD[7:0]

00000000 to temperature readout (see Section 8.10.4.1 on

11111111[1] page 38)

Device status readout if SO = 1 (see Table 11)

7

SR7

display status (see Table 22 on page 19)

0[1]

display is disabled

1

display is enabled

6

SR6

charge pump switching status

(status of bit CPE, see Table 14 on page 14)

0[1]

charge pump disabled

1

charge pump enabled

5

SR5

charge pump charge status

0[1]

charge pump has not reached programmed

value

1

charge pump has reached programmed value

PCA8538

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 4 — 26 September 2014

© NXP Semiconductors N.V. 2014. All rights reserved.

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