am79c930 Advanced Micro Devices, am79c930 Datasheet - Page 35

• Manufacturer Part Number: am79c930
• Description: Pcnet-mobile Single-chip Wireless Lan Media Access Controller
• Manufacturer: Advanced Micro Devices

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.
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
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
Pin
PCMCIA
0
0
0
0
1
1
1
Pin
0
0
0
0
1
1
U1INTCNT
TCR7[4:3]
USER7FN
00
01
10
11
TC30[7]
0
0
0
1
0
0
1
USER1EN
TCR14[1]
X
X
0
1
0
1
USER7EN
TCR14[7]
X
X
X
X
X
0
1
rising or falling edge
USER1 Pin
falling edge
rising edge
IRQ Select
Event
PnPx70
IRQ Select
X
USER7/
PnPx70
P R E L I M I N A R Y
Ch
Ch
Ch
Ch
X
X
Bh
Bh
Bh
X
X
X
X
Am79C930
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:
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.
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.
IRQ Type
IRQ Type
PnPx71
USER7/
PnPx71
1 => interrupt signalled
1 => interrupt signalled
1 => interrupt signalled
0 => interrupt disabled
Result (TCR11[3])
2h
1h
2h
1h
X
X
X
X
X
X
X
X
X
U1INT Bit
that
Pin Direction
Pin Direction
USER1/
IRQ12
IRQ11
OD
OD
O
O
O
O
O
I
I
I
I
I
I
are
reset default condition
routed
Pin Data
Pin Data
TIR29[1]
TIR29[1]
TIR29[7]
USER1/
through
IRQ12
IRQ12
IRQ12
IRQ11
IRQ11
IRQ11
NA
NA
NA
NA
NA
NA
AMD
the
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