
116
Agere Systems Inc.
Data Sheet
May 2001
and Packet Payload Engine
Ambassador T8110 PCI-Based H.100/H.110 Switch
12 Error Reporting and Interrupt Control
(continued)
12.1.2.2 GPIO Edge/Level and GPIO Polarity Registers
The GPIO edge/level and GPIO polarity registers control how interrupts are interpreted on the GP[7:0] signals
(negative edge, positive edge, low level, or high level).
12.1.3 Interrupts Via Internal System Errors
Table 92. System Error Interrupt Assignments
Table 91. GPIO Edge/Level and GPIO Polarity Registers
Byte
Address
0x00607
Name
Bit(s) Mnemonic
Value
Function
GPIO Polar-
ity
7
IG7SB
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
GP7 interrupts are negative edge or low level (default).
GP7 interrupts are positive edge or high level.
GP6 interrupts are negative edge or low level (default).
GP6 interrupts are positive edge or high level.
GP5 interrupts are negative edge or low level (default).
GP5 interrupts are positive edge or high level.
GP4 interrupts are negative edge or low level (default).
GP4 interrupts are positive edge or high level.
GP3 interrupts are negative edge or low level (default).
GP3 interrupts are positive edge or high level.
GP2 interrupts are negative edge or low level (default).
GP2 interrupts are positive edge or high level.
GP1 interrupts are negative edge or low level (default).
GP1 interrupts are positive edge or high level.
GP0 interrupts are negative edge or low level (default).
GP0 interrupts are positive edge or high level.
6
IG6SB
5
IG5SB
4
IG4SB
3
IG3SB
2
IG2SB
1
IG1SB
0
IF0SB
System Interrupt Bit
SYS15
SYS14
SYS13
SYS12
SYS11
SYS10
SYS9
SYS8
SYS7
SYS6
SYS5
SYS4
SYS3
SYS2
SYS1
SYS0
Description
Clock failsafe indicator.
Clock fallback indicator.
PCI target, minibridge discard timer expired.
PCI target, VC memory discard timer expired.
PCI target, data memory discard timer expired.
PCI target, minibridge protocol error.
PCI target, VC memory protocol error.
PCI target, data memory protocol error.
PCI master, PCI bus fatal error.
PCI master, external buffer lock error.
PCI master, external buffer stall error.
PCI master, external buffer stall warning.
PCI master, external buffer overwrite warning.
PCI master, external buffer initial warning.
VC memory, scratchpad overflow warning.
NOTIFY_QUEUE, overflow warning.