![](http://datasheet.mmic.net.cn/330000/PM73122_datasheet_16444367/PM73122_355.png)
RELEASED
PM73122 AAL1GATOR-32
DATASHEET
PMC-1981419
ISSUE 7
32 LINK CES/DBCES AAL1 SAR PROCESSOR
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
330
TRIB_TYP[1:0]
The TRIB_TYP[1:0] field is used to specify the characteristics of the SBI
tributary as shown in the following table. It should correspond with the
FR_STRUCT setting in the LIN_STR_MODE memory register for the link
associated with this tributary in the AAL1gator-32 setup.
Table 34 TRIB_TYP Encoding
CAS
Enabled
Framed
Transparent
VT (Floating)
TRIB_TYP
Description
True
True
False
00
Structured with
CAS
False
True
False
01
Structured without
CAS
False
False
False
10
UnStructured
False
False
True
11
Transparent VT
(not supported)
Notes:
CAS can only be enabled for a framed tributary.
“Framed” means framing information available – may be channelized or
unchannelized.
“Unframed” means no framing information available.
If Structured with CAS mode is used, SYNCH_TRIB must also be set.
SYNCH_TRIB
The SYNCH_TRIB bit is used to indicate whether the tributary is locked to the
SBI SPE (i.e. is in synchronous mode). If this bit is set than the tributary is
locked. If this bit is not set, then the tributary is free to float. This bit will
default to off.
Note: Any write to a Tributary Control register for a tributary will generate a
configuration reset on that tributary, irrespective of whether the data
written to the tributary control register is unchanged from the previous
value.