Sharp UX-B20 Service Manual

UX-B20U/UX-B20C/B25C
5 – 11
µPD65945 (IC4) Pin descriptions
SYMBOL PIN NO. I/O DESCRIPTION PAD CELL. NOTE
System Operation Signals (3 pin)
XIN 75 I X’tal in OSI1 32.256 MHz
XOUT 74 O X’tal out OSO1
ASICRES 70 I Reset
L: Operate
H: Reset
FIS1 Schmitt
SYMBOL PIN NO. I/O DESCRIPTION PAD CELL. NOTE
Fax Engine Bus Interface (21 pin)
SYSCLK 83 O System clock for Fax Engine FE04 32.256 MHz Output
A0 104 I Address bus
L: Logic 0
H: Logic 1
FI01
A1 103 I FI01
A2 102 I FI01
A3 101 I FI01
A4 100 I FI01
A5 99 I FI01
D0 95 I/O Data bus
L: Logic 0
H: Logic 1
B00C
D1 94 I/O B00C
D2 93 I/O B00C
D3 92 I/O B00C
D4 91 I/O B00C
D5 90 I/O B00C
D6 89 I/O B00C
D7 88 I/O B00C
CS_N 68 I Chip select
L: Select
H: Deselect
FI01 Schmitt
RD_N 106 I Read strobe
L: Read
FI01 Schmitt
WR_N 107 I Write strobe
L: Write
FI01 Schmitt
INT_N 67 O Interrupt
L: Interrupt
Hi-Z: No Interrupt
EXTH Open Drain
RDY 61 O External Wait
L: Wait
Hi-Z: Ready
EXTH Open Drain
SCANSYNC 60 I Scanner Motor Sync. Signal
Rise: Sync.
FISI Schmitt
SYMBOL PIN NO. I/O DESCRIPTION PAD CELL. NOTE
Thunderbolt Control Interfaces (4 pin)
SCS_N 141 O Chip Select FO09
SCLK 142 O Clock FO09
SDAT 140 O Data FO09
SRST_N 133 I Reset FISI Schmitt
SYMBOL PIN NO. I/O DESCRIPTION PAD CELL. NOTE
Spitfire Control Signals (14 pin)
SFRES_N 127 O Reset FE04
ACLK 130 O A-Line Counter Clock FE04
AGATE 129 O Reset A-Line to Low FE04
PLCLK 128 O Shift Clock for P-Line Data FE04
PDATA0 120 O Serial Data Output#0 FE04
PDATA1 119 O Serial Data Output#1 FE04
PDATA2 118 O Serial Data Output#2 FE04
PDATA3 117 O Serial Data Output#3 FE04
PLOAD 113 O Latches into Holding Reg. FE04
PENABLE 114 O Enables P-Line Output Drive FE04
LCN 111 O Latch Control Register FE04
LHCS 112 O Latch Heater States FE04
OK2PRT 125 I P-Line Driver Status FISI Schmitt
PHID 126 I Print Head ID Compare Status FISI Schmitt

Sharp UX-B20 Specifications

General

Brand	Sharp
Model	UX-B20
Category	Fax Machine
Language	English