Motorola PowerQUICC II MPC8280 Series Reference Manual page 610

Overview
At its most flexible, the TSA can provide four separate TDM channels, each with
independent receive and transmit routing assignments and independent sync pulse and
clock inputs. Thus, the TSA can support eight, independent, half-duplex TDM sources, four
in reception and four in transmission, using eight sync inputs and eight clock inputs.
Figure 15-3 shows a dual-channel example.
TDMa
TSA
TDMb
Note:
SCCs can receive on one TDM and transmit on another (SCC2 and SCC3).
In addition to channel programming, the TSA supports up to four strobe outputs that may
be asserted on a bit or byte basis. These strobes are completely independent from the
channel routing used by the SCCs and SMCs. The strobe outputs are useful for interfacing
to other devices that do not support the multiplexed interface or for enabling/disabling
three-state I/O buffers in a multiple-transmitter architecture. Notice that open-drain
programming on the TXDx pins that supports a multiple-transmitter architecture occurs in
the parallel I/O block. These strobes can also be used for generating output wave forms to
support such applications as stepper-motor control.
15-6
Freescale Semiconductor, Inc.
TDMa Tx SYNC
TDMa Tx CLOCK
SCC2
TDMa Rx
TDMa Rx Sync
TDMa Rx Clock
TDMa Rx
TDMb Tx Sync
TDMb Tx Clock
SCC3
TDMa Tx
TDMb Rx Sync
TDMb Rx Clock
TDMb Rx
Figure 15-3. Dual TDM Channel Example
MPC8280 PowerQUICC II Family Reference Manual
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SMC1
SCC2
SCC3
SCC4
SCC2
SMC1
SMC1
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