Справочник Пользователя для Motorola G24
Software Procedures Related to RS232 HW Lines
B-4
AT Commands Reference Manual
December 31, 2007
Advanced Mode MUX Software Flow Control Per Channel
The MUX software flow control per channel is not implemented in G24 internal MUX.
MUX Modes
The following table describes the differences between each mode in a non-ERM environment.
Note:
The length is still required in the information field of the UIH frame.
Advance Mode Transparency Mechanism
There is a set of protected characters that cannot appear between the start and end flags. These
characters are protected by the transparency mechanism within the following fields: address,
control, information and FCS. This mechanism is detailed in the packing/unpacking subsections
that follow.
characters are protected by the transparency mechanism within the following fields: address,
control, information and FCS. This mechanism is detailed in the packing/unpacking subsections
that follow.
Table B-1: MUX Mode Differences
Feature
Basic Mode
Advanced Mode
Start flag
0xF9
0x7E
Close flag
0xF9
0x7E
Length field
Yes
No
Data transparency
No
Yes
Frame
UIH (or UI)
UIH (or UI)
Processing cost
Low
High
Recovery of
synchronization
synchronization
Slow
Quick
SW flow control per
channel
channel
Yes
No
Table B-2: Protected Characters
Protected Characters
Value
Encoded Value
Flag sequence (SOF,
EOF)
EOF)
0x7e
0x7d, 0x5e
Control escape
0x7d
0x7d, 0x5d
XON
0x11
0x7d, 0x31
XOFF
0x13
0x7d, 0x33