PCA8538UG(2014) 데이터 시트보기 (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

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

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

Bit

Symbol

Value

Description

4

SR4

reset status flag

0

no reset has occurred since the reset status

flag was cleared last time

1[1]

reset has occurred since the reset status flag

was cleared last time[2]

3 to 0 SR[3:0]

EMC detection

01 SA1 SA0

pre-defined code for EMC detection when I2C

interface is used

0101

pre-defined code for EMC detection when SPI

interface is used

[1] Default value.

[2] The flag is set whenever a reset occurs, induced by RST pin, Power-On Reset (POR), or Initialize

command. After power-on, the flag is set and should be cleared for reset monitoring.

Some bits of the Status-readout command have a certain probability of being changed by

an EMC/ESD event. For example, an EMC/ESD event can cause a change of the

hard-wired settings of SA1 or SA0. Therefore SR[3:0] can help to detect if an EMC/ESD

event has occurred which has caused the change of a bit. In environments where

EMC/ESD events may occur, it could be helpful to compare the result of the

Status-readout command with the initial bit settings periodically.

8.2.8 Command: Clear-reset-flag

The Clear-reset-flag command clears the reset flag SR4, see Table 12.

Table 13. Clear-reset-flag - Clear-reset-flag command bit description

Bit

Symbol

Value

Description

-

R/W

0

fixed value

-

RS[1:0]

00

fixed value

7 to 0 -

00011111

fixed 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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