Freescale Semiconductor DSP56366 - Manual (Page 172)

ESAI Programming Model
DSP56366 24-Bit Digital Signal Processor User Manual, Rev. 4
8-22 Freescale Semiconductor
8.3.2.17 TCR Transmit Even Slot Data Interrupt Enable (TEDIE) - Bit 21
The TEDIE control bit is used to enable the transmit even slot data interrupts. If TEDIE is set, the transmit
even slot data interrupts are enabled. If TEDIE is cleared, the transmit even slot data interrupts are
disabled. A transmit even slot data interrupt request is generated if TEDIE is set and the TEDE status flag
in the SAISR status register is set. Even time slots are all even-numbered time slots (0, 2, 4, etc.) when
operating in network mode. The zero time slot in the frame is marked by the frame sync signal and is
considered to be even. Writing data to all the data registers of the enabled transmitters or to TSR clears the
TEDE flag, thus servicing the interrupt.
Transmit interrupts with exception have higher priority than transmit even slot data interrupts, therefore if
exception occurs (TUE is set) and TEIE is set, the ESAI requests an ESAI transmit data with exception
interrupt from the interrupt controller.
8.3.2.18 TCR Transmit Interrupt Enable (TIE) - Bit 22
The DSP is interrupted when TIE and the TDE flag in the SAISR status register are set. When TIE is
cleared, this interrupt is disabled. Writing data to all the data registers of the enabled transmitters or to TSR
clears TDE, thus clearing the interrupt.
Transmit interrupts with exception have higher priority than normal transmit data interrupts, therefore if
exception occurs (TUE is set) and TEIE is set, the ESAI requests an ESAI transmit data with exception
interrupt from the interrupt controller.
8.3.2.19 TCR Transmit Last Slot Interrupt Enable (TLIE) - Bit 23
TLIE enables an interrupt at the beginning of last slot of a frame in network mode. When TLIE is set the
DSP is interrupted at the start of the last slot in a frame in network mode regardless of the transmit mask
register setting. When TLIE is cleared the transmit last slot interrupt is disabled. TLIE is disabled when
TDC[4:0]=$00000 (on-demand mode). The use of the transmit last slot interrupt is described in
Section 8.4.3, "ESAI Interrupt Requests" .
8.3.3 ESAI Receive Clock Control Register (RCCR)
The read/write Receive Clock Control Register (RCCR) controls the ESAI receiver clock generator bit and
frame sync rates, word length, and number of words per frame for the serial data. The RCCR control bits
are described in the following paragraphs (see
Figure 8-8 ).
11 10 9 8 7 6 5 4 3 2 1 0
X:$FFFFB8 RDC2 RDC1 RDC0 RPSR RPM7 RPM6 RPM5 RPM4 RPM3 RPM2 RPM1 RPM0
23 22 21 20 19 18 17 16 15 14 13 12
RHCKD RFSD RCKD RHCKP RFSP RCKP RFP3 RFP2 RFP1 RFP0 RDC4 RDC3
Figure 8-8 RCCR Register