Preliminary
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Registers
6.3.2.79 Interrupt State Register (INTR_STATE)
The interrupt state register is shown in
and described in
Figure 6-101. Interrupt State Register (INTR_STATE)
31
1
0
Reserved
INTR
R-0h
R-0h
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 6-110. Interrupt State Register (INTR_STATE) Field Descriptions
Bit
Field
Description
31-1
Reserved
Reserved
0
INTR
Interrupt State. When an interrupt is asserted; this bit is set to 1. The polarity of the INT output signal is set
using this bit and the POLARITY bit in the INT_CTRL register. Only INTR1, INTR2, INTR3, and INTR4 bits
with matching set bits in INT_UNMASK can contribute to setting the INTR bit.
6.3.2.80 Interrupt Source Register (INTR1)
The interrupt source register is shown in
and described in
Figure 6-102. Interrupt Source Register (INTR1)
31
16
Reserved
R-0h
15
8
Reserved
R-0h
7
6
5
4
3
2
1
0
SOFT
HPD
RSEN
DROP_SAMPL
BIP_HASE_ER
RI_128
OVER_RUN
UNDER_RUN
E
R
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
R-0h
LEGEND: R/W = Read/Write; R = Read only; -n = value after reset
Table 6-111. Interrupt Source Register (INTR1) Field Descriptions
Bit
Field
Description
31-8
Reserved
Reserved
7
SOFT
Software Induced Interrupt - allows the firmware to generate an interrupt directly.
6
HPD
Monitor detect interrupt - asserted if hot plug detect has changed state. The HDMI transmitter signals a
change in the connectivity to a Sink, either unplug or plug. HDMI specifies that hot plug be active only
when the Sink s EDID is ready to be read and that hot plug be toggled any time there is a change in
connectivity downstream of an attached repeater.
5
RSEN
Receiver sense interrupt asserted if RSEN has changed. This interrupt is set whenever V
CC
is applied to or
removed from the attached HDMI receiver chip. A receiver with multiple input ports can also disconnect the
TMDS termination to the unused port, which triggers this RSEN interrupt.
4
DROP_SAMPLE
New preamble forced to drop sample (S/PDIF input only). If the HDMI transmitter detects an 8-bit preamble
in the S/PDIF input stream before the subframe has been captured, this interrupt is set. A S/PDIF input that
stops signaling or a flat line condition can create such a premature preamble.
3
BIP_HASE_ERR
Input S/PDIF stream has bi-phase error. This can occur when there is noise or an Fs rate change on the
S/PDIF input.
2
RI_128
Input counted past frame count threshold set in RI_128_COMP register. This interrupt occurs when the
count written to register RI_128_COMP is matched by the VSYNC (frame) counter in the HDMI transmitter.
It should trigger the firmware to perform a link integrity check. Such a match occurs every 128 frames.
781
SPRUGX9 – 15 April 2011
High-Definition Multimedia Interface (HDMI)
© 2011, Texas Instruments Incorporated
Содержание TMS320C6A816 Series
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