HEIDENHAIN iTNC 530 HSCI - Principles of Data Transfer

1858 HEIDENHAIN Technical Manual iTNC 530 HSCI
10.1.1 Principles of data transfer
The term "data" is used to describe all of the information that the computer is
capable of collecting and processing.
Serial/Parallel Data can be transmitted in either serial or parallel format.
Basically, data is coded in the computer system, e.g. as bytes (8 bits), and
supplied to the interface in parallel.
In the case of serial data transmission, the parallel information from the
computer system has to be converted into a serial data flow by a USART
(Universal Synchronous/Asynchronous Receiver/Transmitter).
The receiver accepts the serial data flow and converts it back again into parallel
information:
0
1
1
0
1
0
1
1
0
1
1
0
1
0
1
1
0
1
1
0
1
0
1
1
LSB
MSB
0
1
1
0
1
0
1
1
0
1
1
0
1
0
1
1
LSB
MSB
Transmission length
Memory
Interface
buffer
Transmitter Receiver
Interface
buffer
Memory