Publication No. 500-9300527837-000 Rev. A.0
FPGA Registers 69
6.27 GPIO Both Edges Register (0x676)
When enabled, both-edge mode causes interrupts to be generated on both rising
and falling edges. The GPIO bit must be in edge mode for both-edge mode to
work.
6.28 GPIO Interrupt Status Register (0x677)
Write a ‘1’ to the appropriate bit to clear the corresponding interrupt.
6.29 GPIO7 to GPIO0 Availability Register (0x678)
This allows software easily to determine which signals of GPIO7 to GPIO0 are
available. GPIO signals are only available when the board is configured with
appropriate build option.
Bits
Read/Write Description
Default
7 to 0
Read/Write GPIO7 to GPIO0 respectively:
1 = Both-edge mode enabled
0 = Both-edge mode disabled
0x00
Bits
Read/Write Description
Default
7 to 0
Read/Write GPIO7 to GPIO0 respectively:
1 = Interrupt pending
0 = No interrupt
0x00
Bit
Description
Default
7
GPIO7 availability:
1 = GPIO7 available
0 = GPIO7 not available
N/A
6
GPIO6 availability:
1 = GPIO6 available
0 = GPIO6 not available
N/A
5
GPIO5 availability:
1 =GPIO5 available
0 =GPIO5 not available
N/A
4
GPIO4 availability:
1 =GPIO4 available
0 =GPIO4 not available
N/A
3
GPIO3 availability:
1 =GPIO3 available
0 =GPIO3 not available
N/A
2
GPIO2 availability:
1 =GPIO2 available
0 =GPIO2 not available
N/A
1
GPIO1 availability:
1 =GPIO1 available
0 =GPIO1 not available
N/A
0
GPIO0 availability:
1 =GPIO0 available
0 =GPIO0 not available
N/A