MCP23S17 Microchip Technology, MCP23S17 Datasheet - Page 23
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MCP23S17
Manufacturer Part Number
MCP23S17
Description
16-Bit I/O Expander with Serial Interface
Manufacturer
Microchip Technology
Datasheet
1.MCP23S17.pdf
(48 pages)
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1.6.11
The OLAT register provides access to the output
latches. A read from this register results in a read of the
OLAT and not the port itself. A write to this register
modifies the output latches that modifies the pins
configured as outputs.
REGISTER 1-11:
© 2007 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
R/W-0
OL7
OUTPUT LATCH REGISTER (OLAT)
OL7:OL0: These bits reflect the logic level on the output latch <7:0>
1 = Logic-high.
0 = Logic-low.
R/W-0
OL6
OLAT – OUTPUT LATCH REGISTER 0 (ADDR 0x0A)
W = Writable bit
‘1’ = Bit is set
R/W-0
OL5
R/W-0
OL4
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
MCP23017/MCP23S17
R/W-0
OL3
R/W-0
OL2
x = Bit is unknown
R/W-0
OL1
DS21952B-page 23
R/W-0
OL0
bit 0