PCF8536AT/1 View Datasheet(PDF) - NXP Semiconductors.
Part Name
Description
MFG CO.
PCF8536AT/1
NXP Semiconductors.
'PCF8536AT/1' PDF : 74 Pages View PDF
NXP Semiconductors
PCF8536
Universal LCD low multiplex driver with 6 channel PWM generator
9.2.8.1
Status read out
Status read out for I2C-bus operation only. This command will initiate the read out of a
fixed value plus the slave address bit A0 from the PCF8536. This read out function will
allow the I2C master to confirm the existence of the device on the I2C-bus.
Table 38. Status read out value
Bit
Symbol
Value
7 to 1 -
0101 010
0
A0
0
1
Description
fixed value
read back value is 01010100
read back value is 01010101
If a readout is made, the R/W bit must be logic 1 and then the next data byte following is
provided by the PCF8536 as shown in Figure 37.
R/W = 1
slave address
readout byte
S 0 1 1 1 0 0 A 1 A 01 01 01 0 AAP
0
0
acknowledge (1)
acknowledge
from master
013aaa463
(1) From PCF8536.
Fig 37. I2C-bus protocol read mode
In the unlikely case that the chip has entered the internal test mode, detection of this state
is possible by using the modified status read out detailed in Table 39. The read out value
is modified to indicate that the chip has entered an internal test mode.
Table 39. Modified status read out value
Bit
Symbol
Value
7 to 1 -
1111 000
0
A0
0
1
Description
fixed value
read back value is 1111 0000
read back value is 1111 0001
EMC detection: The PCF8536 is ruggedized against EMC susceptibility; however it is not
possible to cover all cases. To detect if a severe EMC event has occurred, it is possible to
check the responsiveness of the device by reading its register.
PCF8536
Product data sheet
All information provided in this document is subject to legal disclaimers.
Rev. 1 — 6 October 2011
© NXP B.V. 2011. All rights reserved.
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