MCP23016 Microchip Technology, MCP23016 Datasheet - Page 7

• Manufacturer Part Number: MCP23016
• Description: 16-Bit I2C I/O Expander
• Manufacturer: Microchip Technology

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1.7.2
Two registers provide access to the two port output
latches:
• OLAT0 (provides access to the output latch for
• OLAT1 (provides access to the output latch for
A read from these registers results in a read of the latch
that controls the output and not the actual port. A write
to these registers updates the output latch that controls
the output.
REGISTER 1-3:
REGISTER 1-4:
© 2007 Microchip Technology Inc.
bit 7-0
bit 7-0
port GP0)
port GP1)
OUTPUT LATCH REGISTERS
OL0.0:O0.7: Reflects the logic level on the output latch.
1 = Logic ‘1’
0 = Logic ‘0’
OL1.0:O1.7: Reflects the logic level on the output latch.
1 = Logic ‘1’
0 = Logic ‘0’
Legend:
R = Readable bit
- n = Value at POR
Legend:
R = Readable bit
- n = Value at POR
R/W-0
OL0.7
R/W-0
OL1.7
bit 7
bit 7
OLAT0 - OUTPUT LATCH REGISTER 0
OLAT1 - OUTPUT LATCH REGISTER 1
R/W-0
R/W-0
OL0.6
OL1.6
R/W-0
R/W-0
OL0.5
OL1.5
W = Writable bit
‘1’ = Bit is set
W = Writable bit
‘1’ = Bit is set
R/W-0
OL0.4
R/W-0
OL1.4
R/W-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
R/W-0
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
OL0.3
OL1.3
R/W-0
R/W-0
OL0.2
OL1.2
x = Bit is unknown
x = Bit is unknown
R/W-0
R/W-0
OL0.1
OL1.1
MCP23016
R/W-0
OL0.0
R/W-0
OL1.0
bit 0
bit 0
DS20090C-page 7