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ThunderBird Avenger
TM
PCI Audio SAA7785
Accelerator
Philips Semiconductors Preliminary Specification
1999 Nov 12 67
TABLE 72 TMCOUNT1 (RW) - MULTIMEDIA TIMER COUNT REGISTER 1
TABLE 73 TMCOUNT0 (RW) - MULTIMEDIA TIMER COUNT REGISTER 0
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
3:0 TMCOUNT2 RW High Nibble Timer Count. This nibble is the most significant digits of the timer
value.
SONGBASE D7 D6 D5 D4 D3 D2 D1 D0
Offset 02h TMCOUNT1[7:0]
POR Value 00000000
Bit Name R/W Function
7:0 TMCOUNT1 RW Middle Byte Timer Count. This byte is the middle significant digits of the timer
value.
SONGBASE D7 D6 D5 D4 D3 D2 D1 D0
Offset 01h TMCOUNT0[7:0]
POR Value 00000000
Bit Name R/W Function
7:0 TMCOUNT0 RW Low Byte Timer Count. This byte is the least significant digits of the timer
value.
SONGBASE D7 D6 D5 D4 D3 D2 D1 D0
Offset 04h PGPIO_DIR[7:0]
POR Value 00000000
Bit Name R/W Function
7:0 PGPIO_DIR RW 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.
Bit Name R/W Function