MCP23016 データシートの表示（PDF） - Microchip Technology
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MCP23016 Datasheet PDF : 38 Pages
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MCP23016
1.7.2 OUTPUT LATCH REGISTERS
Two registers provide access to the two port output
latches:
• OLAT0 (provides access to the output latch for
port GP0)
• OLAT1 (provides access to the output latch for
port GP1)
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: OLAT0 - OUTPUT LATCH REGISTER 0
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
OL0.7 OL0.6 OL0.5 OL0.4 OL0.3
bit 7
R/W-0
OL0.2
R/W-0
OL0.1
R/W-0
OL0.0
bit 0
bit 7-0
OL0.0:O0.7: Reflects the logic level on the output latch.
1 = Logic ‘1’
0 = Logic ‘0’
Legend:
R = Readable bit
- n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
REGISTER 1-4: OLAT1 - OUTPUT LATCH REGISTER 1
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
OL1.7 OL1.6 OL1.5 OL1.4 OL1.3
bit 7
R/W-0
OL1.2
R/W-0
OL1.1
R/W-0
OL1.0
bit 0
bit 7-0
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
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared x = Bit is unknown
© 2007 Microchip Technology Inc.
DS20090C-page 7
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