YMF724F
September 21, 1998
-6-
6. Miscellaneous (15-pin)name I/O type Size function
ROMCS O T 3mA Chip select for external EEPROM
ROMSK / VOLUP# IO Tup 3mA Serial clock for external EEPROM
or Hardware Volume (Up)
ROMDO / VOLDW# IO Tup 3mA Serial data output for external EEPROM
or Hardware Volume (Down)
ROMDI / TEST2# I Tup - Serial data input for external EEPROM or Test pin
(Do not connect externally when EEPROM is not.)
XI24 I C - 24.576 MHz Crystal
XO24 O C 2mA 24.576 MHz Crystal
TEST[7:4,1:0]# I Tup - Test pins (Do not connect externally)
TEST3# IO Tup 3mA Test pin (Connect to ground)
LOOPF[1:0] - - - Capacitor of PLL
Note) Hardware volume and EEPROM interface can not be used at the same time. When both hardware
volume and EEPROM are not used, do not connect these pins externally.
7. Power Supply (39-pin)name I/O type Size function
PVDD[5:0] - - - Power supply for PCI Bus Interface (+5.0)
PVSS[14:0] - - - Ground for PCI Bus Interface
LVDD - - - Power supply for PLL Filter (+3.3)
LVSS - - - Ground for PLL Filter
VDD3[3:0] - - - Power supply (+3.3V)
VDD5[3:0] - - - Power supply (+5.0V)
VSS[7:0] - - - Ground
TYPE
T : TTL A : Analog Ptr : Tri-State PCI
Ttr : Tri-State TTL C : CMOS Pstr : Sustained Tri-Sate PCI
Tup : Pull up (Max. 300kohm) TTL P : PCI Pod : Open Drain PCI