ECR-ER-02FD cable
Fig. 3-2
Interfacing signals
Pin
No.
Signal
name
In/Out On level Description
1 GND — — Signal ground
2
ER Out Low Equipment ready
3
DR In Low Data set ready
4RXD In
High: MARK
Low: SPACE
Receive data
5 TXD Out
High: MARK
Low: SPACE
Transmit data
6
CD In Low Carrier detect
7
RR Out Low Ready to receive
8
CS In Low Clear to send
9
RS Out Low Request to send
4. Application specification
The following service (SRV) modes are available for the serial data
transfer of the ECR
1) Data transmit (Source side)
2) Data receive (Target)
5. Data format
A single byte image of the RAM data to be transmitted is divided into a
high order 4 bits and low order 4 bits and converted into ASCII code.
Then, the image of the memory is sent in the following format:
Memory top address: 0000H FFFFH
Top address of the memory to be transmitted in ASCII number.
Page : 00 02
Page of the memory to be transmitted in ASCII number.
Sum check
End code : Hex 0D
NOTE : In order that contents of RAM memory may not over-ride
pages for this job, RAM image is sent in unit of 64 bytes from
the address 0000. In other words, 128 bytes are sent at one
time on the transmit data format.
RAM DATA FORMAT
Exhibit :
Code table
HEX ASCII Character HEX ASCII Character
030 0 838 8
131 1 939 9
232 2 A41 A
333 3 B42 B
434 4 C43 C
535 5 D44 D
636 6 E45 E
737 7 F46 F
6. END record
End message: Fixed to 30303030.
End massage: Fixed to 4646.
Sum check
End code: CR (0D)
SD 2 SD
RD
CTS
RD
3
6
5
3
2
6
8
ER-02FD
75SG
RTS
4
DCD
8
DTR
20
DSR
7
1
4
ECR
CTS
SG
RTS
DCD
DTR
DSR
1FG FRAME GROUND is connected
to the shield of the cable.
25PIN D-SUB 9PIN D-SUB
SD : TRANSMITTED DATA
RD : RECEIVED DATA
DTR: DATA TERMINAL READY
DSR: DATA SET READY
RTS: REQUEST TO SEND
DCD: DATA CARRIER DETECTOR
CTS: CLEAR TO SEND
FG : FRAME GROUND
96 X#/TM/ST TL/NS
98 X#/TM/ST TL/NS
1
2
3
4
Data (128bytes)
BD
7E 83
FC
03 B6
42 44 37 45 38 33 46 43 30 33 42 36
30
3
4
303030
1
2
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