PCA9502BS,157 NXP Semiconductors, PCA9502BS,157 Datasheet - Page 12

• Manufacturer Part Number: PCA9502BS,157
• Description: IC I/O EXPANDER I2C/SPI 24HVQFN
• Manufacturer: NXP Semiconductors

Specifications of PCA9502BS,157

• Interface: I²C, SPI
• Number Of I /o: 8
• Interrupt Output: No
• Frequency - Clock: 400kHz
• Voltage - Supply: 2.3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-VQFN Exposed Pad, 24-HVQFN, 24-SQFN, 24-DHVQFN
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 935281363157; PCA9502BS; PCA9502BS

NXP Semiconductors
PCA9502_3
Product data sheet
Fig 10. Master writes to slave
Fig 11. Master read from Slave
S
White block: host to PCA9502
Grey block: PCA9502 to host
White block: host to PCA9502
Grey block: PCA9502 to host
SLAVE ADDRESS
S
SLAVE ADDRESS
The register read cycle (see
sending a slave address with the direction bit set to ‘write’ with a following sub-address.
Then, in order to reverse the direction of the transfer, the master issues a repeated START
followed again by the device address, but this time with the direction bit set to ‘read’. The
data bytes starting at the internal sub-address will be clocked out of the device, each
followed by a master-generated acknowledge. The last byte of the read cycle will be
followed by a negative acknowledge, signalling the end of transfer. The cycle is terminated
by a STOP signal.
Table 12.
Bit
7
6:3
2:1
0
W
Register address byte (I
Name
-
A[3:0]
-
-
A
W
REGISTER ADDRESS
Rev. 03 — 13 October 2006
A
REGISTER ADDRESS
Figure
Function
not used
internal register select
not used, set to 0
not used
2
C-bus)
11) commences in a similar manner, with the master
A
8-bit I/O expander with I
nDATA
S
A
SLAVE ADDRESS
A
nDATA
LAST DATA
A
2
002aab047
C-bus/SPI interface
R
PCA9502
© NXP B.V. 2006. All rights reserved.
P
NA
A
002aab048
P
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