DSP56303 FREESCALE [Freescale Semiconductor, Inc], DSP56303 Datasheet - Page 136

• Manufacturer Part Number: DSP56303
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

Enhanced Synchronous Serial Interface (ESSI)
output. If
Output Flag 0 (OF0) bit in the CRB. If
a receive shift register clock input. As serial Input Flag 0,
Flag 0 (IF0) bit in the ESSI Status Register (SSISR).
When
SCD0 bit value.
can be programmed as a GPIO signal (
Note:
7.2.5 Serial Control Signal (SC1)
ESSI0:SC01; ESSI1: SCI11
To determine the function of
Table 7-2. In Asynchronous mode (as for a single codec with asynchronous transmit and
receive),
signal of transmit shift register TX2, for the transmitter 0 drive-enabled signal, or for serial flag
I/O. As serial flag I/O,
together for multiple serial device selection; they can be unencoded to select up to two CODECs
or decoded externally to select up to four CODECs. If
frame sync signal, the Serial Control Direction 1 CRB[SCD1] bit determines its direction.
7-4
SYN
0
0
0
0
1
1
1
1
1
1
1
1
1
SC0
SC1
SC0
The ESSI can operate with more than one active transmitter only in Synchronous
mode.
TE0
is configured as a transmit data signal, it is always an output signal, regardless of the
0
0
1
1
0
0
0
0
0
0
0
0
1
is the receiver frame sync I/O. In Synchronous mode,
is used as the serial Output Flag 0, its value is determined by the value of the serial
Control Bits
SC0
TE1
X
X
X
X
0
0
0
0
1
1
1
1
0
is fully synchronized with the other transmit data signals (
SC1
TE2
X
X
X
X
0
0
1
1
0
0
1
1
0
operates like
Table 7-2. Mode and Signal Definitions
SC1
, select either Synchronous or Asynchronous mode, according to
RE
0
1
0
1
0
1
0
1
0
1
0
1
0
DSP56303 User’s Manual, Rev. 2
P0
SC0
SC0
) when the ESSI
RXC
RXC
F0/U
F0/U
F0/U
F0/U
SC0
TD1
TD1
TD1
TD1
U
U
U
is an input, it functions as either serial Input Flag 0 or
.
SC0
and SC1are independent flags but can be used
F1/T0D/U
F1/T0D/U
F1/T0D/U
F1/T0D/U
FSR
FSR
SC1
TD2
TD2
TD2
TD2
SC1
U
U
U
SC0
SC0
is configured as a serial flag or receive
controls the state of the serial Input
function is not in use.
ESSI Signals
SC2
FST
FST
FS
FS
FS
FS
FS
FS
FS
FS
U
U
U
SC1
is the transmitter data out
SCK
TXC
TXC
XC
XC
XC
XC
XC
XC
XC
XC
U
U
U
Freescale Semiconductor
STD
STD
TD0
TD0
TD0
and
U
U
U
U
U
U
U
U
U
U
SC1
).
SRD
RD
RD
RD
RD
RD
RD
U
U
U
U
U
U
U
SC0