MCP2502X Datasheet, PDF (33/66 Pages) Microchip Technology – CAN I/O Expander Family

MCP2502X/5X
REGISTER 5-4:
IOINTPO REGISTER
R/W-0 R/W-0 R/W-0
GP7POL GP6POL GP5POL
bit 7
R/W-0
GP4POL
R/W-0
GP3POL
R/W-0
GP2POL
R/W-0
GP1POL
R/W-0
GP0POL
bit 0
bit 7-0
GP7POL:GP0POL: Transmit-on-change Polarity bits
1 = Digital Inputs: Low-to-High Transition On Corresponding GPIO Input Pin Generates a
transmit message
Analog Inputs: A/D result above compare value generates a transmit message
0 = Digital Inputs: High-to-Low Transition On Corresponding GPIO Input Generates transmit
message
Analog Inputs: A/D result below compare value generates a transmit message
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 5-5:
IOINTFL REGISTER
R-0
R-0
R-0
GP7TXF GP6TXF GP5TXF
bit 7
R-0
GP4TXF
R-0
GP3TXF
R-0
GP2TXF
R-0
GP1TXF
R-0
GP0TXF
bit 0
bit 7-0
GP7TXF:GP0TXF: Transmit-on-change Polarity bits
1 = Digital Inputs: A valid edge has occurred on the digital input
Analog Inputs: A/D result does exceed the compare threshold
0 = Digital Inputs: A valid edge has not occurred on the digital input
Analog Inputs: A/D result does not exceed the compare threshold
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.
DS21664D-page 33