PCA8538UG(2014) View Datasheet(PDF) - NXP Semiconductors.
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MFG CO.
PCA8538UG Datasheet PDF : 107 Pages
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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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