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13. COMMUNICATION FUNCTION
13.2 Communication specifications
13.2.1 Communication overview
This driver is designed to send a reply on receipt of an instruction. The device which gives this instruction (e.g.
personal computer) is called a master station and the device which sends a reply in response to the instruction
(driver) is called a slave station. When fetching data successively, the master station repeatedly commands the
slave station to send data.
Item
Description
Baud rate
9600/19200/38400/57600/115200 asynchronous system
Transfer code
Start bit
: 1 bit
Data bit
: 8 bits
Parity bit
: 1 bit (even)
Stop bit
: 1 bit
Transfer protocol
Character system, half-duplex communication system
1 frame (11bits)
Data
0
1
2
3
4
5
6
7
(LSB)
(MSB)
Start
Parity
Stop
Next
start
