YMF724F
6. Miscellaneous (15-pin)
name
ROMCS
I/O
O
type
T
Size
function
3mA
Chip select for external EEPROM
Serial clock for external EEPROM
or Hardware Volume (Up)
ROMSK / VOLUP#
ROMDO / VOLDW#
ROMDI / TEST2#
IO
IO
I
Tup
Tup
Tup
3mA
3mA
-
Serial data output for external EEPROM
or Hardware Volume (Down)
Serial data input for external EEPROM or Test pin
(Do not connect externally when EEPROM is not.)
24.576 MHz Crystal
XI24
I
O
I
C
C
-
2mA
-
XO24
24.576 MHz Crystal
TEST[7:4,1:0]#
TEST3#
Tup
Tup
-
Test pins (Do not connect externally)
Test pin (Connect to ground)
IO
-
3mA
-
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
PVDD[5:0]
I/O
type
Size
function
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Power supply for PCI Bus Interface (+5.0)
Ground for PCI Bus Interface
Power supply for PLL Filter (+3.3)
Ground for PLL Filter
PVSS[14:0]
LVDD
LVSS
VDD3[3:0]
VDD5[3:0]
VSS[7:0]
Power supply (+3.3V)
Power supply (+5.0V)
Ground
TYPE
T : TTL
A : Analog
C : CMOS
P : PCI
Ptr : Tri-State PCI
Ttr : Tri-State TTL
Tup : Pull up (Max. 300kohm) TTL
Pstr : Sustained Tri-Sate PCI
Pod : Open Drain PCI
January 14, 1999
-6-
YAMAHA [ YAMAHA CORPORATION ]
