(Pin Assignment Table)
CPU pins identified with an asterisk are active when LOW.
Centronics signals preceded by an ’n’are active when LOW.
Pin Name
I/O
Drive
Description
R3710/40 Interface
SYSCLK
∗
I
System Clock: connects directly to the CPU SYSCLK
∗
output.
SYSRESET
∗
I
System Reset: resets the R3741 to its initial state.
IODATA [7:0]
I/O
4mA
Input/Output Device Data: connects directly to bits [7:0] of Bidirectional I/O Data bus.
IOA [3:2]
I
Input/Output Address Bus: connect to two (2) I/O address lines.
IOCS
∗
I
Input/Output Chip Select: connects to a chip select for the 8-bit I/O data bus.
IOWR
∗
I
Input/Output Device Write: connects directly to R3710/40 IOWR
∗
.
IORD
∗
I
Input/Output Device Read: connects directly to R3710/40 IORD
∗
.
INTERRUPT
∗
O
4mA
Interrupt: indicates detection of an initialization strobe during compatibility mode. Should be connected to
an R3710/40 interrupt line.
R3710/40 Centronics Peripheral Status Signals
nACK
I
R3710/40 Centronics Acknowledge: connects directly to the R3710/40 CACK
∗
signal.
BUSY
I
R3710/40 Centronics Busy: connects directly to the R3710/40 CBUSY signal.
nFAULT
I
R3710/40 Centronics Fault: connects directly to the R3710/40 CFAULT
∗
signal.
PERROR
I
R3710/40 Centronics Peripheral Error: connects directly to the R3710/40 CPERROR signal.
SELECT
I
R3710/40 Centronics Select: connects directly to the R3710/40 CSELECT signal.
Modified Centronics Peripheral Status Signals
pld_nACK
O
18mA
modified Centronics Acknowledge: connects to the Centronics connector nACK signal through a series
resistor (may be buffered).
pld_BUSY
O
18mA
modified Centronics Busy: connects to the Centronics connector Busy signal through a series resistor
(may be buffered).
pld_nFAULT
O
18mA
modified Centronics Fault: connects to the Centronics connector nFAULT signal through a series resistor
(may be buffered).
pld_PERROR
O
18mA
modified Centronics Peripheral Error: connects to the Centronics connector PERROR signal through a
series resistor (may be buffered).
pld_SELECT
O
18mA
modified Centronics Select: connects to the Centronics connector Select signal through a series resistor
(may be buffered).
Centronics Host Status Signals
nSELECTIN
I
Centronics Selectin: connects to the Cintronics connector nSELECTIN signal (may be connected to an
external buffer first).
nSTROBE
I
Centronics Strobe: connects to the Centronics connector STROBE signal (may be connected to an
external buffer first).
nAUTOFD
I
Centronics Auto Feed: connects to the Centronics connector nAUTOFD signal (may be connected to an
external buffer first).
nINIT
I
Centronics Initializtion: connects to the Centronics connector nINIT signal (may be connected to an
external buffer first).
Modified Centronics Host Status Signals
pld_nSELECTIN
O
4mA
modified Selectin: connects directly to R3710/40 CSELECTIN
∗
signal.
pld_nSTROBE
O
4mA
modified Strobe: connects directly to R3710/40 CSTROBE
∗
signal.
pld_nAUTOFD
O
4mA
modified Auto Feed: connects directly to R3710/40 CAUTOFD
∗
signal.
pld_nINIT
O
4mA
modified Initialzation: connects directly to R3710/40 CINIT
∗
signal.
SHARP SERVICE MANUAL JX8200SM [13] ELECTRICAL SECTION
13 – 12
Содержание JX-8200
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