Figure D-18 Sci Receive And Transmit Data Registers (Srx, Trx - Motorola DSP56309 User Manual

Programming Reference
Application:
SCI
SCI Transmit Data Registers
Address X:$FFFF95 Ð X:$FFFF97
Reset = xxxxxx
Note: STX is the same register decoded at four different addresses
SCI Receive Data Registers
Address X:$FFFF98 Ð X:$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-32
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
DSP56309UM/D
Date:
Programmer:
ÒAÓ ÒBÓ
Unpacking
16 15
STX
STX
SCI Transmit SR
RXD SCI Receive SR
16 15
SRX
SRX
Packing
ÒAÓ ÒBÓ
Sheet 3 of 3
ÒCÓ
8 7 0
STX
TXD
STXA
8 7 0
SRX
ÒCÓ
MOTOROLA