PEB2085 SIEMENS [Siemens Semiconductor Group], PEB2085 Datasheet - Page 221

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

BAS
CODR
CIC0
Note:
4.2.3
Value after reset: 3C
RSS
Semiconductor Group
Bus Access Status
Indicates the state of the TIC-bus:
0: the ISAC-S itself occupies the D and C/I channel
1: another device occupies the D and C/I channel
C/I Code Receive
Value of the received Command/Indication code. A C/I code is loaded in CODR only
after being the same in two consecutive IOM frames and the previous code has been
read from CIRR.
(refer to chapter 3.3.2)
C/I Code Change
A change in the received Command/Indication code has been recognized. This bit is
set only when a new code is detected in two consecutive IOM frames. It is reset by a
read of CIRR.
The BAS and CODR bits are updated every time a new C/I code is detected in two
consecutive IOM frames.
If several consecutive codes are detected and CIRR is not read, only the first and the
last C/I code (and BAS bit) is made available in CIRR at the first and second read of
that register, respectively.
Reset Source Select
Only valid if the terminal specific functions are activated (STCR:TSF).
0 :
7
Command/Indication Transmit RegisterCIXR
RSS
– a falling edge on the EAW line (External Subscriber Awake)
– a C/I code change (Exchange Awake).
signal, just as the SPU-bit (SPCR) does.
Subscriber or Exchange Awake
As reset source serves:
A logical zero on the EAW line activates also the IOM-interface clock and frame
BAC
H
CODX
221
Write
TCX
Register Description
ECX
Address 31
0
H