SAA7785 Datasheet, PDF (44/68 Pages) NXP Semiconductors – ThunderBird Avenger PCI Audio Accelerator

Philips Semiconductors
ThunderBird Avenger^TM PCI Audio
Accelerator
TABLE 26 Interrupt Line Register - INTLINE (RW)
PCI CFG 0
D7
D6
D5
D4
D3
Offset 3Ch
INTLINE[7:0]
POR Value
0
0
0
0
0
Preliminary Specification
SAA7785
D2
D1
D0
0
0
0
Bit
7:0
Name
INTLINE
R/W
RW
Function
Interrupt Line. The Interrupt Line register is an eight bit register used to com-
municate interrupt line routing information. The value in this register tells
which input of the system interrupt controller(s) the SSA7785 ThunderBird
Avenger™ Device's interrupt pin is connected to. If serial interrupts are
enabled (COMARCH0 Register IRQSER=1) then the INT_LINE register will
be read only and will have the value of all 1's. If Serial Interrupts are disabled
(IRQSER=0) then the INT_LINE register will be readable/writable.
TABLE 27 Interrupt Pin Register - INTPIN (RO)
PCI CFG 0
D7
D6
D5
D4
D3
D2
D1
D0
Offset 3Dh
INTPIN[7:0]
POR Value
0
0
0
0
0
0
0
1
Bit
7:0
Name
INTPIN
R/W
RO
Function
Interrupt Pin. The interrupt pin register tells which interrupt the SSA7785
ThunderBird Avenger™ device uses. If serial interrupts are enabled
(COMARCH0 Register IRQSER=1) then the INT_PIN register will have the
read only value of all 0's implying that the SSA7785 ThunderBird Avenger™
device does not use any of the PCI Interrupt pins. If Serial Interrupts are dis-
abled (IRQSER=0) then the INT_PIN register will have the read only value of
01h implying that the SSA7785 ThunderBird Avenger™ device uses INT A
interrupt pin.
TABLE 28 MIN_GNT Register - MINGNT (RO)
PCI CFG 0
D7
D6
D5
D4
D3
D2
D1
D0
Offset 3Eh
MINGNT[7:0]
POR Value
0
0
0
0
1
0
0
1
1999 Nov 12
44