Sharp ER-A450T Service Manual - Page 38

Down Load Function

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CHAPTER 6. DOWN LOAD FUNCTION 1. General RAM data can be transmitted in the following two methods. Save the data before servicing as follows: ECR ECR • Cable: 9 pin D-SUB - 9 pin D-SUB ECR ECR Fig. 1-1 ECR ER-02FD • Cable: 9 pin D-SUB - 25 pin D-SUB ECR ER-02FD Fig. 1-2 2. SIO interface specification 1) Operation: Simplex 2) Line configuration: Direct connect 3) Data rate: 19200, 9600, 4800, 2400, 1200, 600, 300BPS (Selected by SRV JOB#903-A) 4) Sync mode: Asynchronous 5) Checking: Vertical parity (odd) 6) Code: 7 bits (ASCII) 7) Bit sequence: LSB first 8) Line level: RS232 level 9) Data forma: LSB MSB b1 b2 b3 b4 b5 b6 b7 P Start bit FIg. 2-1 Parity bit Stop bit 3. Location of connector pins ECR-ECR cable 9PIN D-SUB ECR 9PIN D-SUB ECR SD 3 3 SD RD 2 2 RD RTS 7 7 RTS DCD 1 1 DCD DTR 4 4 DTR DSR 6 6 DSR CTS 8 8 CTS SG 5 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 Fig. 3-1 5 SG 6 - 1

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CHAPTER 6. DOWN LOAD FUNCTION
1. General
RAM data can be transmitted in the following two methods.
Save the data before servicing as follows:
ECR
ECR
•
Cable: 9 pin D-SUB – 9 pin D-SUB
Fig. 1-1
ECR
ER-02FD
•
Cable: 9 pin D-SUB – 25 pin D-SUB
Fig. 1-2
2. SIO interface specification
1) Operation:
Simplex
2) Line configuration:
Direct connect
3) Data rate:
19200,
9600,
4800,
2400,
1200,
600,
300BPS (Selected by SRV JOB#903-A)
4) Sync mode:
Asynchronous
5) Checking:
Vertical parity (odd)
6) Code:
7 bits (ASCII)
7) Bit sequence:
LSB first
8) Line level:
RS232 level
9) Data forma:
FIg. 2-1
3. Location of connector pins
ECR-ECR cable
Fig. 3-1
ECR
ECR
ECR
ER-02FD
P
b1
b2
b3
b4
b5
b6
b7
LSB
MSB
Start bit
Parity
bit
Stop
bit
SD
3
SD
RD
CTS
RD
2
6
8
3
2
6
8
5
5
SG
RTS
7
DCD
1
DTR
4
DSR
7
1
4
ECR
CTS
SG
RTS
DCD
DTR
DSR
9PIN 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
ECR
6 – 1