YMF724F

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

September 21, 1998

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Yamaha YMF724F specifications Miscellaneous 15-pin, Power Supply 39-pin