Pin 91: User1/Irq12/Extcts/Exint188; Pin 92: User7/Irq11 - AMD Am79C930 Preliminary Manual

Note that a read of the USERDT[0] bit (TIR29[0]) will al-
ways give the current USER0/RFRSH pin value, regard-
less of pin configuration setting.
PCMCIA USER1EN
Pin
0
0
0
0
1
1
Note that a read of the USERDT[1] bit (TIR29[1]) will al-
ways give the current USER1/IRQ12 pin value, regard-
less of pin configuration setting.
In addition to the functionality listed above, the
USER1/IRQ12/EXTCTS/EXINT188 pin may be used to
enable the internal TX state machine. This capability is
controlled by the CTSEN bit of TCR7 and operates inde-
pendently of the table above and independently of the
U1INTCNT bits of TCR7. When the CTSEN bit of TCR7
is set to 1, then the value of the USER1/IRQ12/
EXTCTS/EXINT188 pin will be ANDed with the value of
the TXS bit of TIR8. The output of the AND gate will
then be used to determine the start of the TX state
machine. In this way, an external signal, through the
USER1/IRQ12/EXTCTS/EXINT188 input, can be used
U1INTCNT
TCR7[4:3]
00
01
10
11

Pin 92: USER7/IRQ11

The USER7/IRQ11 pin may be configured for input op-
eration, output operation, or ISA IRQ11 operation ac-
cording to the following table:
PCMCIA USER7FN
Pin TC30[7]
0 0
0 0
0 0
0 1
1 0
1 0
1 1
P R E L I M I N A R Y
IRQ Select
TCR14[1] PnPx70
X Ch
X Ch
0 Ch
1 Ch
0 X
1 X
USER1 Pin
Event
X
rising edge
falling edge
rising or falling edge
USER7/
USER7EN IRQ Select
TCR14[7] PnPx70
X Bh
X Bh
X Bh
X X
0 X
1 X
X X

Pin 91: USER1/IRQ12/EXTCTS/EXINT188

The USER1/IRQ12 pin may be configured for input
operation, output operation, or ISA IRQ12 operation ac-
cording to the following table:
IRQ Type
PnPx71
2h
1h
X
X
X
X
to control the start of the TX state machine, provided that
Am79C930 device firmware has enabled the operation
by setting the TXS bit of TIR8.
In addition to the functionality listed above, the
USER1/IRQ12/EXTCTS/EXINT188 pin may be used to
produce interrupts to the 80188 embedded controller.
This capability is controlled by the U1INTCNT bits of
TCR7 and operates independently of the bits in the
table above and independently of the CTSEN bit of
TCR7.Interrupts
USER1/IRQ12/EXTCTS/EXINT188 pin are indicated in
the U1INT bit of TCR11. The following table lists the pro-
gramming options for using the USER1/IRQ12/
EXTCTS/EXINT188 pin as a source of external interrupt
to the 80188 controller.
U1INT Bit
Result (TCR11[3])
0 => interrupt disabled
1 => interrupt signalled
1 => interrupt signalled
1 => interrupt signalled
Note that a read of the USER7DL bit (TIR29[7]) will al-
ways give the current USER7/IRQ11 pin value, regard-
less of pin configuration setting.
USER7DL (TIR29[7]) gives the current value of the
USER7/IRQ11 pin.
USER7/
IRQ Type
PnPx71
2h
1h
X
X
X
X
X
Am79C930
USER1/ USER1/
IRQ12 IRQ12
Pin Direction Pin Data
O IRQ12
OD IRQ12
I NA
O TIR29[1]
I NA
O TIR29[1]
that are routed through
reset default condition
IRQ11 IRQ11
Pin Direction Pin Data
O IRQ11
OD IRQ11
I NA
I NA
I NA
O TIR29[7]
I NA
AMD
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