PCA9502 Ver la hoja de datos (PDF) - NXP Semiconductors.
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PCA9502 Datasheet PDF : 25 Pages
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NXP Semiconductors
PCA9502
8-bit I/O expander with I2C-bus/SPI interface
master write: S SLAVE ADDRESS W A
data transferred
(n bytes + acknowledge)
DATA
A
DATA
AP
START condition
write acknowledge
acknowledge acknowledge
STOP condition
data transferred
(n bytes + acknowledge)
master read: S SLAVE ADDRESS R A
DATA
A
DATA
NA P
START condition
read acknowledge
acknowledge
not
acknowledge
STOP condition
combined
formats:
data transferred
(n bytes + acknowledge)
data transferred
(n bytes + acknowledge)
S SLAVE ADDRESS R/W A
DATA
A Sr SLAVE ADDRESS R/W A
DATA
AP
START condition
read or
write
acknowledge acknowledge
repeated
START condition
read or acknowledge
write
direction of transfer
may change at this point
acknowledge
STOP condition
002aab458
Fig 9. I2C-bus data formats
PCA9502_3
Product data sheet
Rev. 03 — 13 October 2006
© NXP B.V. 2006. All rights reserved.
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