W83178S Просмотр технического описания (PDF) - Winbond

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W83178S

100 MHZ 3-DIMM SDRAM BUFFER

Winbond 

Preliminary W83178S

4. BLOCK DIAGRAM

SDATA

SCLK

Buffer_In

Serial port

device Control

SDRAM0

SDRAM1

SDRAM2

SDRAM3

SDRAM4

SDRAM5

SDRAM6

SDRAM7

SDRAM8

SDRAM9

SDRAM10

SDRAM11

SDRAM12

5. PIN DESCRIPTION

IN - Input

OUT - Output

I/O - Bi-directional Pin

* - Internal 250K Ω pull-up

SYMBOL

SDRAM [ 0:12]

*SDATA

*SDCLK

BUFFER_IN

VDD

Vss

PIN

I/O

FUNCTION

2, 3, 6, 7, 10, O SDRAM clock outputs which have the same

11, 12, 18, 19,

frequency as CPU clocks.

22, 23, 26, 27

14

I/O Serial data of I2C 2-wire control interface

15

IN Serial clock of I2C 2-wire control interface

9

IN Clock Input from the chipset

1, 5, 13, 20,

24, 28

- Power supply

4, 8, 16, 17,

21, 25

- Circuit ground

-2-

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