XRA1207 Datasheet, PDF (7/17 Pages) Exar Corporation – 16-BIT I2C/SMBUS GPIO EXPANDER

XRA1207
REV. 1.0.0
16-BIT I2C/SMBUS GPIO EXPANDER WITH INTEGRATED LEVEL SHIFTERS
1.2 Interrupts
The table below summarizes the interrupt behavior of the different register settings for the XRA1207.
TABLE 3: INTERRUPT GENERATION AND CLEARING
GCR IER REIR FEIR IFR
BIT BIT BIT BIT BIT
INTERRUPT GENERATED BY:
INTERRUPT CLEARED BY:
1 0 X X X No interrupts enabled (default)
N/A
0 A rising or falling edge on the input
1 1 0 0 ^{1 A rising or falling edge on the input and}
remains in the new state for more than
1075ns
Reading the GSR register or if the input
changes back to its previous state (state of
input during last read to GSR)
0 A rising edge on the input
Reading the GSR register
1 1 1 0 _{1 A rising edge on the input and remains high}
for more than 1075ns
0 A falling edge on the input
Reading the GSR register
1 1 0 1 _{1 A falling edge on the input and remains low}
for more than 1075ns
0 A rising or falling edge on the input
Reading the GSR register
1 1 1 1 ^{1 A rising or falling edge on the input and}
remains in the new state for more than
1075ns
0 x x x x No interrupts in output mode
N/A
7