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Table 7-4 Mode and Signal Definition Table (Continued)
Control Bits
SYN
TE0
TE1
1
0
0
1
0
0
1
0
0
1
0
1
1
0
1
1
0
1
1
0
1
1
1
0
1
1
0
1
1
0
1
1
0
1
1
1
1
1
1
1
1
1
1
1
1
Note:
TXC
=
Note:
RXC
=
Note:
XC
=
Note:
FST
=
Note:
FSR
=
Note:
FS
=
Note:
TD0
=
Note:
TD1
=
Note:
TD2
=
Note:
T0D
=
Note:
RD
=
Note:
F0
=
Note:
F1
=
Note:
U
=
Note:
X
=
MOTOROLA
TE2
RE
SC0
0
1
F0/U
1
0
F0/U
1
1
F0/U
0
0
TD1
0
1
TD1
1
0
TD1
1
1
TD1
0
0
F0/U
0
1
F0/U
1
0
F0/U
1
1
F0/U
0
0
TD1
0
1
TD1
1
0
TD1
1
1
TD1
Transmitter Clock
Receiver Clock
Transmitter/Receiver Clock (Synchronous Operation)
Transmitter Frame Sync
Receiver Frame Sync
Transmitter/Receiver Frame Sync (Synchronous Operation)
Transmit Data signal 0
Transmit Data signal 1
Transmit Data signal 2
Transmitter 0 drive enable if SSC1 = 1 & SCD1 = 1
Receive Data
Flag 0
Flag 1 if SSC1 = 0
Unused (can be used as GPIO signal)
Indeterminate
DSP56309UM/D
Enhanced Synchronous Serial Interface (ESSI)
ESSI Signals
SC1
SC2
F1/T0D/U
FS
TD2
FS
TD2
FS
F1/T0D/U
FS
F1/T0D/U
FS
TD2
FS
TD2
FS
F1/T0D/U
FS
F1/T0D/U
FS
TD2
FS
TD2
FS
F1/T0D/U
FS
F1/T0D/U
FS
TD2
FS
TD2
FS
ESSI Programming Model
SCK
STD
SRD
XC
U
RD
XC
U
XC
U
RD
XC
U
XC
U
RD
XC
U
XC
U
RD
XC
TD0
XC
TD0
RD
XC
TD0
XC
TD0
RD
XC
TD0
XC
TD0
RD
XC
TD0
XC
TD0
RD
7-25
U
U
U
U
U
U
U
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