pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 62

• Manufacturer Part Number: pef20550
• Description: Extended Line Card Interface Controller Elic
• Manufacturer: Infineon Technologies Corporation

Table 8
Address Recognition (cont’d)
Operating
Mode
Non-auto
mode,
1-byte
address field
Transparent
mode 1
Auto-Mode (MODE:MDS1,MDS0 = 00)
Characteristics: HDLC formatted, NRM-type protocol, 1-byte/2-byte address field,
address recognition, any message length, automatic response generation for RR- and I-
frames, window size 1.
The auto-mode is optimized to communicate with a group controller following a NRM-
(Normal Response Mode) type protocol. Its functionality guarantees a minimum
response time and avoids the interruption of the CPU in many cases.
The SACCO auto-mode is compatible to a PEB 2050 (PBC) behavior in secondary
mode.
Following the PBC-conventions, two data types are supported in auto-mode.
Table 9
Auto-Mode Data Types
Data Types
Direct data
Prepared data
Note: In many applications only direct data is used, nevertheless both data types are
Semiconductor Group
supported because of compatibility reasons.
Compare
Value
High Byte
–
–
<RAH1>
<RAH2>
FCH
FEH
Compare
Value
Low Byte
<RAL1>
<RAL2>
–
–
–
–
Meaning
local P and the group controller, typically signaling data.
maintenance purposes.
Data exchanged in normal operation mode between the
Data request by or send to the group controller for
Activity
Frame is stored transparently in RFIFO
Frame is stored transparently in RFIFO
62
Functional Description
PEB 20550
PEF 20550
01.96