XC161 Datasheet, PDF (171/419 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller with C166SV2 Core Volume 2 (of 2): Peripheral Units

XC161 Derivatives
Peripheral Units (Vol. 2 of 2)
Asynchronous/Synchronous Serial Interface (ASC)
18.5.2 Serial Frames for Autobaud Detection
The Autobaud Detection is based on the serial reception of a specific two-byte serial
frame. This serial frame is build up by the two ASCII bytes “at” or “AT” (“aT” or “At” are
not allowed). Both byte combinations can be detected in five types of asynchronous
frames. Figure 18-17 and Figure 18-18 show the serial frames which are detected at
least.
Note: Some other two-byte combinations will be defined too.
7 Bit, Even Parity
‘a’ = 61_H
100001111
Start
Parity Stop
‘t’ = 74_H
001011101
Start
Parity Stop
7 Bit, Odd Parity
‘a’ = 61_H
100001101
Start
Parity Stop
‘t’ = 74_H
001011111
Start
Parity Stop
8 Bit, No Parity
‘a’ = 61_H
100001101
Start
Stop
‘t’ = 74_H
001011101
Start
Stop
8 Bit, Even Parity
‘a’ = 61_H
1000011011
Start
Parity Stop
‘t’ = 74_H
0010111001
Start
Parity Stop
8 Bit, Odd Parity
‘a’ = 61_H
1000011001
Start
Parity Stop
‘t’ = 74_H
0010111011
Start
Parity Stop
MCT05448
Figure 18-17 Two-Byte Serial Frames with ASCII ‘at’
User’s Manual
ASC_X, V2.0
18-28
V2.2, 2004-01