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YMF724F View Datasheet(PDF) - Yamaha Corporation

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YMF724F
6. Miscellaneous (15-pin)
name
I/O type Size
function
ROMCS
O
T
3mA Chip select for external EEPROM
Serial clock for external EEPROM
ROMSK / VOLUP# IO Tup 3mA
or Hardware Volume (Up)
Serial data output for external EEPROM
ROMDO / VOLDW# IO Tup 3mA
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
PVDD[5:0]
PVSS[14:0]
LVDD
LVSS
VDD3[3:0]
VDD5[3:0]
VSS[7:0]
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
- Power supply (+3.3V)
- Power supply (+5.0V)
- Ground
TYPE
T : TTL
Ttr : Tri-State TTL
Tup : Pull up (Max. 300kohm) TTL
A : Analog
C : CMOS
P : PCI
Ptr : Tri-State PCI
Pstr : Sustained Tri-Sate PCI
Pod : Open Drain PCI
January 14, 1999
-6-
 

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