Motorola DSP56305 User Manual page 634

PROGRAMMING REFERENCE
Application:
SCI
SCI Transmit Data Registers
Address X:$FFFF95 – X:$FFFF97
Reset = xxxxxx
Note: STX is the same register decoded at four different addresses
SCI Receive Data Registers
Address X:$FFFF98 – X:$FFFF9A
Reset = xxxxxx
Note: STX is the same register decoded at three different addresses
Figure D-18 SCI Receive and Transmit Data Registers (SRX, TRX)
D-34
X0
23
X:$FFFF97
X:$FFFF96
Write
X:$FFFF95
SCI Transmit Data Registers
X:$FFFF94
23
X:$FFFF9A
X:$FFFF99
Read
X:$FFFF98
SCI Receive Data Registers
DSP56305 User's Manual
Date:
Programmer:
"A" "B"
Unpacking
16 15
STX
STX
SCI Transmit SR
RXD SCI Receive SR
16 15
SRX
SRX
Packing
"A" "B"
Sheet 3 of 3
"C"
8 7 0
STX
TXD
STXA
8 7 0
SRX
"C"
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