![](http://datasheet.mmic.net.cn/330000/PM73122_datasheet_16444367/PM73122_408.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
383
Receive serial clock output to each link can be sourced from INSBI or
from PISO, depending upon whether the each individual link is
configured to be SYNC mode or ASYNC mode.
Set SYNC-LINKn bit will configure a link to SYNC mode, in which case
serial clock output to that link will be sourced from the Insert SBI Block.
Note that SYNC mode must be set if CAS mode is used.
Clearing SYNC-LINKn will configure a link to ASYNC mode, in which
case the serial clock output to that link will be sourced from the PISO
block.
Note that this synchronous or asynchronous selection can be done on
per link basis.
Local Transmit Frame and Multi-frame Pulses Selection
In SYNC mode, SYNC-LINKn bit in the SBI_SYNC_LINKn registers
must be set. In this mode, transmit frame/multi-frame pulses will be
sourced by the INSBI block.
GEN_SYNC must = 0 in SBI mode.
Tributary type for each tributary.
The tributary type can be configured to be Structured with CAS,
Structured without CAS, or Unstructured. This is configured by setting
TRIB_TYP to the appropriate value in the Extract/Insert. Tributary
Control Register inside the INSBI/EXSBI for that tributary.
The TRIB_TYP value inside INSBI/EXSBI is default to Structure
with CAS. Note that if Structured with CAS mode is used, the
tributary must also be in SYNC mode.
A tributary can float or be locked to the SBI frame structure. If the
tributary is locked it is considered synchronous. A tributary is
synchronous, if either SPEn_SYNCH in the SBI Bus Configuration
Register (SBI_BUS_CFG_REG) or the SYNC_TRIB bit in the Insert
Tributary Control RAM Indirect Access Data Register for this tributary is
set.
Setting SPEn_SYNCH bit in the SBI_BUS_CFG_REG will
configure the entire SPE to be in synchronous mode. To configure
individual link to in synchronous, SPEn_SYNCH bit must be clear
and the corresponding SYNC_LINK bit must be set. Furthermore,