Transmitter Serial Clock (Sckt) - Freescale Semiconductor Symphony DSP56724 Reference Manual

Enhanced Serial Audio Interface (ESAI, ESAI_1, ESAI_2, ESAI_3)
Table 9-1. Receiver Clock Sources (Asynchronous Mode Only) (Continued)
RHCKD RFSD
1 0
1 1
1 1
1 1
1 1
1 1
1 1
1 1
1 1
9.1.8

Transmitter Serial Clock (SCKT)

SCKT is a bidirectional pin providing the transmitters serial bit-clock for the ESAI interface. The direction
of this pin is determined by the TCKD bit in the TCCR register. The SCKT is a clock input or output used
by all the enabled transmitters in the asynchronous mode (SYN=0) or by all the enabled transmitters and
receivers in the synchronous mode (SYN=1).
Table 9-2 provides a list of asynchronous-mode transmitter clock sources.
Table 9-2. Transmitter Clock Sources (Asynchronous Mode Only)
THCKD
0
0
0
0
1
1
1
1
1
1
1
1
Symphony DSP56724/DSP56725 Multi-Core Audio Processors, Rev. 0
9-6
RCKD ERI0
1 1
0 0
0 0
0 1
0 1
1 0
1 0
1 1
1 1
TFSD TCKD
0 0
0 1
1 0
1 1
0 0
0 0
0 0
0 0
0 1
0 1
0 1
0 1
Receiver
ERO0 Bit-Clock
Source
1 EXTAL
0 SCKR
1 SCKR
0 SCKR
1 SCKR
0 Fsys
1 Fsys
0 EXTAL
1 EXTAL
Transmitter
ETI0 ETO0 Bit Clock
Source
N/A N/A
N/A N/A
N/A N/A
N/A N/A
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
OUTPUTS
HCKR —
HCKR FSR
HCKR FSR
HCKR FSR
HCKR FSR
HCKR FSR
HCKR FSR
HCKR FSR
HCKR FSR
OUTPUTS
SCKT – –
HCKT – – SCKT
SCKT – FST
HCKT – FST SCKT
SCKT HCKT –
SCKT HCKT –
SCKT HCKT –
SCKT HCKT –
Fsys HCKT – SCKT
Fsys HCKT – SCKT
EXTAL HCKT – SCKT
EXTAL HCKT – SCKT
Freescale Semiconductor
SCKR
—
—
—
—
SCKR
SCKR
SCKR
SCKR
–
–
–
–
–
–