Toshiba B-EV4 Series Manual page 19

2. ELECTRONICS SPECIFICATIONS
JP4 (Parallel Interfcae):
Signal
Strobe
Data0
Data1
Data2
Data3
Data4
Data5
Data6
Data7
Ack
Busy
Paper Out / End
Select
GND
No Defined
GND
GND
No Defined
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
No Defined
Error / Fault
GND
GND
GND
No Defined
JP7 (Serial Interface):
Signal
+5 V
TXD
RXD
CTS
GND
RTS
N/C
RTS
N/C
This connector is used for the Parallel (Centronics) interface.
Pin
Pin
No.
1
1
2
3
2-9
4
5
6
10
7
8
9
11
10
11
12
12 Paper Out / End
13
13
14
14
15
15
16
16-17
18
17
19-30
18
31
19
32
20
21
33-35
36
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
Type: D-Sub 9pin
This connector is used for the Serial (RS-232C) interface.
Pin
+5V is output from the pin 1.
No.
The TXD signal is a serial signal and output from the pin 2.
1
2
The RXD signal is a serial signal and input into the pin 3.
3
4
5
6
7
8
9
SPP Mode Nibble Mode
Strobe N/A
Data 0-7 N/A
Ack N/A
Busy N/A
N/A
Select N/A
Ground N/A
No Defined N/A
Ground N/A
No Defined N/A
Ground N/A
No Defined N/A
Error / Fault N/A
Ground N/A
No Defined N/A
2-6
2.3 Description of the Main PC Board
I/O Function
A low on this line indicates that there
are valid data at the host. When this
I pin is de-asserted, the +ve clock edge
should be used to shift the data into
the device.
I Data Bus. Single-directional.
A low on this line indicates that there
are valid data at the Device. When this
O pin is de-asserted, the +ve clock edge
should be used to shift the data into
the host.
When in reverse direction, a high
indicates data, while a low indicates a
Ot
command cycle. In forward direction, it
functions as PtrBusy.
When low, device acknowledges
O
reverse request.
O Extensibility flag
GND Ground
N/A
GND Ground
N/A
GND Ground
N/A
A low set by the device indicates that
O
the reverse data is available
GND Ground
N/A
EO18-33025