RELEASED
PM73123 AAL1GATOR-8
DATASHEET
PMC-2000097
ISSUE 2
8 LINK CES/DBCES AAL1 SAR
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: Initial to 0 at startup. 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.
Format: Two data bytes per word.
R_DATA_BUFFER_n Word Format
Field (Bits)
Description
R_DATA_H
(15:8)
Receive data for:
Channel = (offset mod 16) x 2 + 1.
E1 frame = (offset mod 256) / 16.
T1 frame = (offset mod 512) / 16.
E1 multiframe = (offset mod 8192) / 256.
T1 multiframe = (offset mod 8192) / 512.
Line = offset / 8192.
E1 offset = line x 8192 + multiframe(E1) x 256 +
frame(E1) x 16 + (chan-1) / 2.
T1 offset = line x 8192 + multiframe(T1) x 512 +
frame(T1) x 16 + (chan-1) / 2.
R_DATA_L
(7:0)
Receive data for:
Channel = (offset mod 16) x 2.
E1 frame = (offset mod 256) / 16.
T1 frame = (offset mod 512) / 16.
E1 multiframe = (offset mod 8192) / 256.
T1 multiframe = (offset mod 8192) / 512.
Line = offset / 8192.
E1 offset = line x 8192 + multiframe(E1) x 256 +
frame(E1) x 16 + channel / 2.
T1 offset = line x 8192 + multiframe(T1) x 512 +
frame(T1) x 16 + channel / 2.
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