Xerox WorkCentre Pro 412 Service Manual page 66

Circuit Description
Name Pins Level
RD 1 L
RD [7:0] 8 H
RE [1:0] 2 L
RESET 1 L
TESTIN 1 H
TEST- 1 H
OUT
VDD 22 N/A
VDDBIA 1 N/A
S
WR 1 L
RAMWR I L
RD 1 L
RD [7:0] 8 H
RE [1:0] 2 L
Pin Classification and Loading
• 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.
5-28
Resi Type Abbreviation/Description
stor
~ I Command Port Read
H 1/3S RAM Data
~ O RAM Enable
H I Chip Reset
~ I Test Input
O Manufacturing Test Output
~ P Power Supply Source
Input Reference Voltage
~ I Command Port Write
~ I RAM Write Enable
~ I Command Port Read
H 1/3S RAM Data
~ O RAM Enable
3/03
Maximum Loading
Cap. Current (mA)
(pF)
Vol
~ ~
50 4
50 4
~ ~
~ ~
~ ~
~ ~
~ ~
50 4
~ ~
50 4
50 4
WorkCentre Pro 412, FaxCentre F12 &
WorkCentre M15/M15i
Voh
~
4
4
~
~
~
~
~
4
~
4
4