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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
175
Table 15 E1 Tributary Column Numbering
E1#
SPE1 Column
SPE2 Column
SPE3 Column
SBI Column
1,1
2,1
3,1
1,2
2,2
1,21
2,21
3,21
7,28,49,70
19,82,145,208
20,83,146,209
21,84,147,210
22,85,148,211
23,86,149,212
7,28,49,70
7,28,49,70
8,29,50,71
8,29,50,71
27,48,69,90
79,142,205,268
80,143,206,269
81,144,207,270
27,48,69,90
27,48,69,90
11.6.3.1.9
AAL1gator-32 SBI Operation
The SBI Block within the Line Interface Block interfaces to the SBI bus on one
side and inputs/outputs up to 32 T1 links, 32 E1 links or two DS3 links to the
A1SP blocks. It can also support a mix of links made up of a combination of 16
T1 or E1 links or 1 DS3 link. In SBI mode the upper 16 links make up one
configurable unit and the lower 16 links make up another unit. The type of link is
controlled by the setting of LINK_TYPH and LINK_TYPL in
SBI_LINK_CFG_REG. On the SBI bus all the tributaries within an SPE must be
the same type (E1, T1, or DS3). The type of tributaries carried by an SPE is
defined in the SPEn_TYP field in SBI_BUS_CFG_REG. Any tributary within any
SPE of the SBI can be mapped to any link within the Line Interface Block.
Program the INS_TRIB_MAP ram and EXT_TRIB_MAP ram to identify which
A1SP local link should be mapped to each tributary. Since there are more SBI
tributaries then Line Interface links, any tributaries, which are not mapped should
be disabled.
If LINK_TYPn is set to E1 or T1 mode, then the T1_MODE bit in the
LIN_STR_MODE memory register associated with the links in this group needs
to be set to the same value. In other words if LINK_TYPH is set to T1 mode
then T1_MODE bit must be set in the LIN_STR_MODE register for links 16-31.
If the LINK_TYPn is set to DS3 mode then the UDF_HS mode bit should be set
in the HS_LIN_REG in either A1SP0 or A1SP2.
Within an SPE that is configured for E1 or T1, the individual tributaries can be
Structured with CAS, Structured without CAS, or Unstructured. Configuration of
each tributary is controlled by setting the correct values in the TRIB_TYP field of
the INS_TRIB_CTL and EXT_TRIB_CTL registers. If Structured with CAS mode
is used, the SYNCH_TRIB must be set in EXT_TRIB_CTL register for that