Samsung SF-830 Service Manual download pdf (Page 152)

3-22

CIRCUIT DESCRIPTION

Samsung Electronics

Repair Manual

• I : Input

• O : Output

• 3S : Tri-state output

• OD : Open drain output

• P : Power supply

Combinations indicate bidirectional pins.

An “H” in the Resistor column indicates the pad has an internal pull-up resistor. A tilde (~) indicates no internal resistor.

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Name Pins Level Resistor Type Abbreviation/Description Cap. Current(mA)

(pF) Vol Voh

RAMWR I L ~ I RAM Write Enable 50 4 4

RD 1 L ~ I Command Port Read ~ ~ ~

RD [7:0] 8 H H 1/3S RAM Data 50 4 4

RE [1:0] 2 L ~ O RAM Enable 50 4 4

RESET 1 L H I Chip Reset ~ ~ ~

TESTIN 1 H ~ I Test Input ~ ~ ~

TESTOUT 1 H O Manufacturing Test Output ~ ~ ~

VDD 22 N/A ~ P Power Supply Source ~ ~ ~

VDDBIAS 1 N/A Input Reference Voltge

WR 1 L ~ I Command Port Write ~ ~ ~

< Pin Classification and Loading >

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Samsung SF-830 Service Manual Page 152