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SHARP SERVICE MANUAL JX8200SM [13] ELECTRICAL SECTION
Pull Up/
Pin Name
Pull Dn
(1)
CACK ∗
NOTE: This is
the Compatibility
Mode Name.
CBUSY
NOTE: This is
the Compatibility
Mode Name.
CPERROR
NOTE: This is
the Compatibility
Mode Name.
CSELECT
NOTE: This is
the Compatibility
Mode Name.
CAUTOFD ∗
P.U.
NOTE: This is
the Compatibility
Mode Name.
CINIT ∗
P.U.
NOTE: This is
the Compatibility
Mode Name.
CFAULT ∗
NOTE: This is
the Compatibility
Mode Name.
CSELECTIN ∗
P.U.
NOTE: This is
the Compatibility
Mode Name.
Engine Control
ESTROBE ∗
EOE ∗
Video Control
VCLKIN
P.U.
VDATA
LINESYNC ∗
P.U.
PAGESYNC ∗
P.U.
UART(R3740 only)
PIO[4]/RI
Type
O
Centronics acknowledge: Peripheral device driven.
O
Centronics Busy: Peripheral device driven.
O
Centronics Printer Error: Peripheral device driven.
O
Centronics Select: Peripheral device driven.
I
Centronics Autofeed: Host driven.
I
Centronics Initialize: Host driven.
O
Centronics Fault: Peripheral device driven.
I
Centronics Select Input: Host driven.
O
Engine Strobe: Clocks data into the printer's engine register from IODATA[15:0]
O
Engine Output Enable:
When active (LOW), it drives the printer's engine status into IODATA[15:0]
I
Video Clock in: Used for generating the video clock VCLK which is the video data clock.The
VCLKIN frequency is either VCLK × 8 or VCLK.
O
Video Data: to the printer.
I
Line Synchronization: Input from the printer that indicates the beginning of a line. In some
printers this is called Beam Detect (BD) or SYNCBD ∗ .
NOTE: LINESYNC ∗ is an edge-sensitive signal. It is clocked into the 3710/40 by the internal
signal VCLK, where VCLK is equal to VCLKIN/8 when the PLL is used, and VCLKIN when the
PLL is bypassed.
I
Page Synchronization: Input from the printer that indicates the beginning of the page.
NOTE: PAGESYNC ∗ is an edge-sensitive signal. It is clocked into the 3710/40 by the internal
signal VCLK, where VCLK is equal to VCLKIN/8 when the PLL is used, and VCLKIN when the
PLL is bypassed.
I/O
Programmable Input/Output or Ring Indicator: As input, it can be alternatively used as a
Ring indicator for external a modem or as a programmable I/O pin. In the modem option a
change from LOW to HIGH will set a flag in the Modem Status Register and cause an interrupt.
NOTE: This pin behaves RI when bit-6 of the PIO Control Register is 1, and as PIO[4] when
bit-6 is 0.
13 – 10
Description
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