Frame Duration Error-Too Few (Short) - Texas Instruments OMAP5910 Technical Reference Manual

Figure 9–13. Frame Duration Error—Too Few (Short)
CLK
Channel 15
T4 T3 T2
TXD
IT_FERR
t (syn) < 2 T13 MHz
9.5.1.4 Interrupt Programming
FSYNCH received
T1 T0
Over clock duration
t (syn)
At module reset, RX_INT, TX_INT, and FERR_INT are masked.
To validate an interrupt:
If in multichannel mode, the RX and TX interrupts can be configured to occur
in a dedicated channel of the frame [1-16].
-
DSP_WRITE(channel_nb) = INTERRUPTS_REG(3:0) for RX_INT
-
INTERRUPTS_REG(7:4) for TX_INT
Unmask the interrupt:
-
DSP_WRITE(1) =
J
INTERRUPTS_REG(8) for RX_INT
J
INTERRUPTS_REG(9) for TX_INT
J
INTERRUPTS_REG(10) for FERR_INT
On interrupt occurrence:
-
DSP_READ =
J
STATUS_REG(1) for FERR_INT occurrence
J
STATUS_REG(2) for RX_INT occurrence
J
STATUS_REG(3) for RX character overflow
J
STATUS_REG(4) for TX_INT occurrence
J
STATUS_REG(5) for TX character underflow
FSYNCH expected
T7 T6 T5 T4 T3 T2
DSP_WRITE(1) => STATUS_REG(0)
Multichannel Serial Interfaces
Channel 0
T1 T0 T7 T6 T5 T4
t (syn)
DSP Public Peripherals
T3 T2 T1
9-35