PEF20525 INFINEON [Infineon Technologies AG], PEF20525 Datasheet - Page 149

• Manufacturer Part Number: PEF20525
• Description: 2 Channel Serial Optimized Communication Controller for HDLC/PPP
• Manufacturer: INFINEON [Infineon Technologies AG]

Data Sheet
MDS(1:0)
ADM
NRM
Mode Select
This bit field selects the HDLC protocol sub-mode including the
’extended transparent mode’.
MDS = ’00’
MDS = ’01’
MDS = ’10’
MDS = ’11’
Note: ’MDS(1:0)’ must be set to ’10’ if any PPP mode is enabled via bit
Address Mode Select
The meaning of this bit depends on the selected protocol sub-mode:
Automode, Address Mode 2:
Determines the address field length of an HDLC frame.
ADM = ’0’
ADM = ’1’
Address Mode 0/1:
Determines whether address mode 0 or 1 is selected.
ADM = ’0’
ADM = ’1’
Extended Transparent Mode:
ADM = ’1’
Normal Response Mode
This bit is valid in HDLC Automode operation only and determines the
function of the Automode LAP-Controller:
NRM = ’0’
NRM = ’1’
field ’PPPM’ or if SS7 is enabled via bit ’ESS7’ in register CCR3L.
Automode.
Address Mode 2.
Address Mode 0/1.
(Option ’0’ or ’1’ is selected via bit ’ADM’.)
Extended transparent mode (bit transparent transmission/
reception).
8-bit address field.
16-bit address field.
Address Mode 0 (no address recognition).
Address Mode 1 (high byte address recognition).
recommended setting
Full-duplex LAP-B / LAP-D operation.
Half-duplex normal response mode (NRM) operation.
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Register Description (CCR2H)
PEB 20525
PEF 20525
2000-09-14