Toshiba B-EV4 manual JP7 Serial Interface

2. ELECTRONICS SPECIFICATIONS

EO18-33025

2.3 Description of the Main PC Board

JP4 (Parallel Interfcae):

This connector is used for the Parallel (Centronics) interface.

Signal	Pin
	No.
Strobe	1
Data0	2
Data1	3
Data2	4
Data3	5
Data4	6
Data5	7
Data6	8
Data7	9
Ack	10
Busy	11
Paper Out / End	12
Select	13
GND	14
No Defined	15
GND	16
GND	17
No Defined	18
GND	19
GND	20
GND	21
GND	22
GND	23
GND	24
GND	25
GND	26
GND	27
GND	28
GND	29
GND	30
No Defined	31
Error / Fault	32
GND	33
GND	34
GND	35
No Defined	36

Pin	SPP Mode	Nibble Mode	I/O
1	Strobe	N/A	I
2-9	Data 0-7	N/A	I
10	Ack	N/A	O
11	Busy	N/A	Ot
12	Paper Out / End	N/A	O
13	Select	N/A	O
14	Ground	N/A	GND
15	No Defined	N/A	N/A
16-17	Ground	N/A	GND
18	No Defined	N/A	N/A
19-30	Ground	N/A	GND
31	No Defined	N/A	N/A
32	Error / Fault	N/A	O
33-35	Ground	N/A	GND
36	No Defined	N/A	N/A

Function

A low on this line indicates that there are valid data at the host. When this pin is de-asserted, the +ve clock edge should be used to shift the data into the device.

Data Bus. Single-directional.

A low on this line indicates that there are valid data at the Device. When this 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 command cycle. In forward direction, it functions as PtrBusy.

When low, device acknowledges reverse request.

Extensibility flag Ground

Ground

Ground

A low set by the device indicates that the reverse data is available Ground

JP7 (Serial Interface):

Signal	Pin
	No.
+5 V	1
TXD	2
RXD	3
CTS	4
GND	5
RTS	6
N/C	7
RTS	8
N/C	9

Type: D-Sub 9pin

This connector is used for the Serial (RS-232C) interface. +5V is output from the pin 1.

The TXD signal is a serial signal and output from the pin 2. The RXD signal is a serial signal and input into the pin 3.

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