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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.)