RELEASED
PM73123 AAL1GATOR-8
DATASHEET
PMC-2000097
ISSUE 2
8 LINK CES/DBCES AAL1 SAR
Offset
Bits (15:8)
Bits (7:0)
Word 1
Header 3
Header 4
Word 2
Header 4 (HEC)
Blank
Word 3
Payload 1
Payload 2
.
.
.
.
.
.
.
.
.
Word 26
Word 27
Payload 47
Payload 48
CRC_10_PASS
CRC_10_PASS Word Format
Field (Bits)
Description
CRC_10_PASS
(15)
The CRC_10_PASS bit is set if the cell passes the
CRC-10 check.
Not used
(14:0)
Write with a 0 to maintain future software
compatibility.
10.4.13
RESERVED (Receive Data Buffer)
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 channels 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 512frames 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 within A1SP: 10000h
Index (line): 2000h
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