PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 205

• Manufacturer Part Number: PEB2085
• Description: ISDN SubscribernAccess Controller
• Manufacturer: SIEMENS [Siemens Semiconductor Group]

MDS2
MDS1
MDS0
0 0 0
0 0 1
0 1 0
0 1 1
1 0 0
1 0 1
1 1 0
1 1 1
Note:
TMD
Semiconductor Group
Mode
Auto-mode
Auto-mode
Non-auto-
mode
Non-auto-
mode
Reserved
Transparent
mode 1
Transparent
mode 2
Transparent
mode 3
SAP1, SAP2: two programmable address values for the first received address byte
(in the case of an address field longer than 1 byte); SAPG = fixed value FC/FE
TEI1, TEI2: two programmable address values for the second (or the only, in the case
of a one-byte address) received address byte; TEIG = fixed value FF
Timer Mode
Sets the operating mode of the ISAC-S timer. In the external mode (0) the timer is
controlled by the processor. It is started by setting the STI bit in CMDR and it is
stopped by a write of the TIMR register.
In the internal mode (1) the timer is used internally by ISAC-S for timeout and retry
conditions (handling of LAPD/HDLC protocol in auto-mode).
Number
of
Address
Bytes
1
2
1
2
>1
–
>1
1. Byte
TEI1, TEI2
SAP1, SAP2, SAPG
TEI1, TEI2
SAP1, SAP2, SAPG
–
–
SAP1, SAP2, SAPG
Addresss Comparison
205
TEI1, TEI2, TEIG
–
TEI1, TEI2, TEIG
TEI1, TEI2, TEIG
–
–
2. Byte
–
Remark
One-byte address
compare. HDLC protocol
handling for frames with
address TEI1
Two-byte address
compare. LAPD protocol
handling for frames with
address SAP1 + TEI1
One-byte address
compare.
Two-byte address
compare.
Low-byte address
compare.
No address compare.
All frames accepted.
High-byte address
compare.
Register Description
H
.
H
.