SAB82538 Datasheet, PDF (78/253 Pages) Infineon Technologies AG – ICs for Communications

SAB 82538
SAF 82538
2.5 Character Oriented Serial Mode (MONOSYNC/BISYNC)
2.5.1 Data Frame
Character oriented protocols achieve synchronization between transmitting and
receiving station by means of special SYN characters. Two examples are the
MONOSYNC and IBM’s BISYNC procedures. BISYNC has two starting SYN characters
while MONOSYNC uses only one SYN. Figure 34 gives an example of the message
format.
Figure 34
BISYNC Message Format
The SYN character, its length, the length of data characters and additional parity are
programmable:
q SYN with 6 or 8 bit length (MONOSYNC), programmable via register SYNL.
q 2 SYN with 6 or 8 bit length each (BISYNC), programmable via registers SYNL and
SYNH.
q Data character length may vary from 5 to 8 bits.
q Parity information (even/odd parity, Mark, Space) may be appended to the character.
Semiconductor Group
78