SAA7785 Datasheet, PDF (67/68 Pages) NXP Semiconductors – ThunderBird Avenger PCI Audio Accelerator

Philips Semiconductors
ThunderBird Avenger^TM PCI Audio
Accelerator
Preliminary Specification
SAA7785
Bit
3:0
Name
TMCOUNT2
R/W
RW
Function
High Nibble Timer Count. This nibble is the most significant digits of the timer
value.
TABLE 72 TMCOUNT1 (RW) - MULTIMEDIA TIMER COUNT REGISTER 1
SONGBASE
D7
D6
D5
D4
D3
D2
D1
D0
Offset 02h
TMCOUNT1[7:0]
POR Value
0
0
0
0
0
0
0
0
Bit
7:0
Name
TMCOUNT1
R/W
RW
Function
Middle Byte Timer Count. This byte is the middle significant digits of the timer
value.
TABLE 73 TMCOUNT0 (RW) - MULTIMEDIA TIMER COUNT REGISTER 0
SONGBASE
D7
D6
D5
D4
D3
D2
D1
D0
Offset 01h
TMCOUNT0[7:0]
POR Value
0
0
0
0
0
0
0
0
Bit
7:0
Name
TMCOUNT0
R/W
RW
Function
Low Byte Timer Count. This byte is the least significant digits of the timer
value.
PCI I/O SPACE GPIO SUPPORT
The Multimedia Timer house eight General Purpose I/O ports. These ports are independently controlled under host
software.
TABLE 74 PGPIODIR (RW) - PCI GENERAL PURPOSE INPUT/OUPUT DIRECTION
SONGBASE
D7
D6
D5
D4
D3
D2
D1
D0
Offset 04h
PGPIO_DIR[7:0]
POR Value
0
0
0
0
0
0
0
0
Bit
7:0
Name
PGPIO_DIR
R/W
RW
Function
PCI General Purpose I/O Data Direction Bit. These bits control whether the
GPIO pins 0 through 7 act as an input or an output.
0 = Selected GPIO pin is an output.
1 = Selected GPIO pin is an input.
1999 Nov 12
67