Motorola MPC8260 - Manual (Page 470)

14-16 MPC8260 PowerQUICC II UserÕs Manual MOTOROLA
Part IV. Communications Processor Module
Figure 14-9. Example: SI x RAM Dynamic Changes, TDMa and b, Same SI x RAM Size
L1TCLKb
L1TSYNCb
64 TXb
Shadow
64 TXa 64 TXb
Route Route
The TSA uses the first part of
Framing Signals:
L1TCLKa
L1TSYNCa
1) Initial State
the RAM, and the shadow is
64 TXa
Shadow
0 127 128 255 256 383 384 511
CSRRa=0
The user programs the
2) Programming
shadow RAM for the new
The SI swaps between
Swap
the shadow and the
Rx and Tx route and sets
the second part of the RAM.
CSRxn = 0
current-route RAMs
1024 1151 1152 1279 1280 1407 1408 1535
RAM Address:
CSRTa=0
CSRRb=0
CSRTb=0
CSRRa=1
CSRTa=1
CSRRb=1
CSRTb=1
CSRRa=0
CSRTa=0
CSRRb=0
CSRTb=0
L1RCLKb
L1RSYNCb
64 RXb
Shadow
64 RXa 64 RXb
Route Route
Framing Signals:
L1RCLKa
L1RSYNCa
64 RXa
Shadow
RAM Address:
CSRxn.
L1TCLKb
L1TSYNCb
64 TXb
Shadow
64 TXa 64 TXb
Route Route
Framing Signals:
L1TCLKa
L1TSYNCa
64 TXa
Shadow
0 127 128 255 256 383 384 511
1024 1151 1152 1279 1280 1407 1408 1535
RAM Address:
L1RCLKb
L1RSYNCb
64 RXb
Shadow
64 RXa 64 RXb
Route Route
Framing Signals:
L1RCLKa
L1RSYNCa
64 RXa
Shadow
RAM Address:
and resets CSRxn.
L1TCLKb
L1TSYNCb
64 TXb
Shadow
64 TXa 64 TXb
Route Route
Framing Signals:
L1TCLKa
L1TSYNCa
64 TXa
Shadow
0 127 128 255 256 383 384 511
1024 1151 1152 1279 1280 1407 1408 1535
RAM Address:
L1RCLKb
L1RSYNCb
64 RXb
Shadow
64 RXa 64 RXb
Route Route
Framing Signals:
L1RCLKa
L1RSYNCa
64 RXa
Shadow
RAM Address:
3)