PM73121ꢀAAL1gator II
Data Sheet
PMC-Sierra, Inc.
PMC-980620
,VVXHꢀꢁ
AAL1 SAR Processor
CRC_10_PASS Word Format
Field (Bits)
Description
The CRC_10_PASS bit is set if the cell passes the CRC-10 check.
CRC_10_PASS
(15)
Not used
(14:0)
7.8.13 RESERVED (Receive Data Buffer)
NOTE: This structure is reserved and must be initialized to 0 at initial setup. If RX_COND
for some channels is set to “11” (insert old data during underrun), then those chan-
nels may need to be initialized to some other value if “0” data is unacceptable, since
all the queues will reset to the underrun state. Software modifications to this location
after setup will cause incorrect operation.
Organization:Each line has a separate receive data buffer consisting of 512 frame buffers.
Each frame buffer can store 32 bytes. For E1 structured data applications, this allows
storage of 512 frames or 32 multiframes of data. Structured T1 applications use only
the first 24 bytes of each frame buffer for data storage. Also, only the first 24 frame
buffers of every 32 are used to store T1 structured data frames. This provides 384
frames of storage, or 16 multiframes. Unstructured applications store 256 bits of data
in every frame buffer. For E1 with T1 signaling, use T1 structure but with 32 channels.
Base address: 10000h
Index (line): 2000h
Type: Read/Write
Function: The data buffers store receive data information. The data is stored in the buffers
in the order that they will be played out to the lines.
Initialization: It is not necessary to initialize this structure.
Format: Two data bytes per word.
ꢀꢅꢃ
PMC [ PMC-SIERRA, INC ]
