YMF724 datasheet(6/50 Pages) YAMAHA | high performance audio controller for the PCI Bus

6 page

YMF724F

January 14, 1999

-6-

6. Miscellaneous (15-pin)

name

I/O

type

Size

function

ROMCS

3mA

Chip select for external EEPROM

ROMSK / VOLUP#

Tup

3mA

Serial clock for external EEPROM

or Hardware Volume (Up)

ROMDO / VOLDW#

Tup

3mA

Serial data output for external EEPROM

or Hardware Volume (Down)

ROMDI / TEST2#

Tup

Serial data input for external EEPROM or Test pin

(Do not connect externally when EEPROM is not.)

XI24

24.576 MHz Crystal

XO24

2mA

24.576 MHz Crystal

TEST[7:4,1:0]#

Tup

Test pins (Do not connect externally)

TEST3#

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

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