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SHARP SERVICE MANUAL JX8200SM [13] ELECTRICAL SECTION
(Nibble mode)
Transfer
HOST
/AUTOFD
Low
/AUTOFD
High
/AUTOFD
Low
Reverse request
HOST
/AUTOFD
High
PRINTER
/INTR
Low
Interrupt
Clr
DELAY
On
/ACK
Low
/ACK
High
PE
LOW at send ready
/FAULT
LOW at send ready
SELECT
The last negotiation value
BUSY
Forward channel value
DELAY
On
/ACK
HIgh
PRINTER
Devalid
On
/FAULT
Low
/ACK
Low
DELAY
On
/ACK
High
PE
Low
13 – 25
Send data is set with software
depending on PE, /Fault, SELECT,
and BUSY.
With delay on, 500ns timer is on.
Control of PE and /Fault is set with
the hardware.
With delay on, 500ns timer is on.
ON when sending is allowed.
With delay on, 500ns timer is on.
When the request is detected, AutoFd
is driven to HIGH.
0~35ms
0~1s
0~1s
0~35ms
min0.5µs
0~35ms
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