YMF744B
February 3, 1999
-6-
3. External Audio Interface (5-pin)
Name
I/O
Type
Size
Function
SPDIFOUT
O
T
2mA
Digital Audio Interface output
SPDIFIN
I
Tup
-
Digital Audio Interface input
ZVBCLK
I
Tup
-
Zoomed Video Port Bit Clock
ZVLRCK
I
Tup
-
Zoomed Video Port L/R Clock
ZVSDI
I
Tup
-
Zoomed Video Port Serial Data
4. Legacy Device Interface (15-pin)
Name
I/O
Type
Size
Function
IRQ5
O
Ttr
12mA
Interrupt5 of Legacy Audio
It is directly connected to the interrupt signal of
System I/O chip.
IRQ7
O
Ttr
12mA
Interrupt7 of Legacy Audio
IRQ9
O
Ttr
12mA
Interrupt9 of Legacy Audio
IRQ10
O
Ttr
12mA
Interrupt10 of Legacy Audio
IRQ11
O
Ttr
12mA
Interrupt11 of Legacy Audio.
GP[3:0]
I
A
-
Game Port
GP[7:4]
I
Tup
-
Game Port
RXD
I
Tup
-
MIDI Data Receive
TXD
O
T
2mA
MIDI Data Transfer
5. Miscellaneous (11-pin)
Name
I/O
Type
Size
Function
ROMCS
O
T
2mA
Chip select for external EEPROM
ROMSK / VOLUP#
IO
Tup
2mA
Serial clock for external EEPROM
or Hardware Volume (Up)
ROMDO / VOLDW#
IO
Tup
2mA
Serial data output for external EEPROM
or Hardware Volume (Down)
ROMDI
I
Tup
-
Serial data input for external EEPROM
XI24
I
C
-
24.576 MHz Crystal
XO24
O
C
-
24.576 MHz Crystal
LOOPF
I
A
-
Capacitor for PLL
GPIO[2:0]
IO
Tup
2mA
General purpose Input / Output
GPIO2 can use for a reset pin of Secondary AC’97.
TEST#
I
Tup
-
LSI Test pin (Do not connect externally.)