SurePrint SP91 - Page 13

SP91 User Manual
4) During paper feeding using the paper fedd button.
5) When the printer stops printing due to a paper-end(in cases when empty paper supply is
detected by either the paper roll end detector or the paper roll near-end detector with a
printing halt due to paper shortage enabled by ESC c 4).
6) During macro executing standby status.
7) When an error has occurred.
Reverse data mode
The status data transmission from the printer to the host is processed in the nibble or byte mode.
NOTE
NOTE
NOTE
NOTE ： At
At
At
At present,
present,
present,
present, reverse
reverse
reverse
reverse data
data
data
data transmission
transmission
transmission
transmission by
by
by
by nibble.
nibble.
nibble.
nibble.
· Description
This mode allows data transmission from the asynchronous printer under the control
by the host.
Data transmissions in the Nibble mode are made via the existing control lines in units of
four bits. In the byte mode, data transmissions are processed by making the eight-bit data lines
bidirectional.
The both modes fall to process concurrently with the compatibility mode, thereby causing half
duplex transmission.
2.1.2.2
2.1.2.2
2.1.2.2
2.1.2.2 Interface
Interface
Interface
Interface Pin
Pin
Pin
Pin Signal
Signal
Signal
Signal Defination
Defination
Defination
Defination
Interface Pin Assignments for Each Mode
Pin Source
Compatibility
Mode
4-bits Mode
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Host
Host/Ptr
Host/Ptr
Host/Ptr
Host/Ptr
Host/Ptr
Host/Ptr
Host/Ptr
Host/Ptr
Printer
Printer
Printer
Printer
Host
Printer
nStrobe
Data0(LSB)
Data1
Data2
Data3
Data4
Data5
Data6
Data7(MSB)
nAck
Busy
Perror
Select
nAutoFd
NC
GND
FG
Logic-H
GND
GND
GND
GND
HostClk
Data0(LSB)
Data1
Data2
Data3
Data4
Data5
Data6
Data7(MSB)
PtrClk
PtrBusy/Data3, 7
AckDataReq/Data2, 6
Xflag/Data1, 5
HostBusy
ND
GND
FG
Logic-H
GND
GND
GND
GND