876784 Intel, 876784 Datasheet - Page 746
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876784
Manufacturer Part Number
876784
Description
Manufacturer
Intel
Datasheet
1.876784.pdf
(848 pages)
Specifications of 876784
Lead Free Status / RoHS Status
Compliant
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19.2.27
19.2.28
746
RINTCNT—Response Interrupt Count Register
(Intel
Memory Address:HDBAR + 5Ah
Default Value:
RIRBCTL—RIRB Control Register
(Intel
Memory Address:HDBAR + 5Ch
Default Value:
15:8
7:0
7:3
Bit
Bit
2
1
0
Reserved.
N Response Interrupt Count — R/W.
0000 0001b = 1 response sent to RIRB
...........
1111 1111b = 255 responses sent to RIRB
0000 0000b = 256 responses sent to RIRB
The DMA engine should be stopped when changing this field or else an interrupt may be
lost.
Note that each response occupies 2 DWords in the RIRB.
This is compared to the total number of responses that have been returned, as opposed
to the number of frames in which there were responses. If more than one codec
responds in one frame, then the count is increased by the number of responses
received in the frame.
Reserved.
Response Overrun Interrupt Control — R/W.
0 = Hardware will Not generated an interrupt as described below.
1 = The hardware will generate an interrupt when the Response Overrun Interrupt
Enable RIRB DMA Engine — R/W. After software writes a 0 to this bit, the hardware
may not stop immediately. The hardware will physically update the bit to 0 when the
DMA engine is truly stopped. Software must read a 0 from this bit to verify that the
DMA engine is truly stopped.
0 = DMA stop
1 = DMA run
Response Interrupt Control — R/W.
0 = Disable Interrupt
1 = Generate an interrupt after N number of responses are sent to the RIRB buffer OR
®
®
High Definition Audio Controller—D27:F0)
High Definition Audio Controller—D27:F0)
Status bit (HDBAR + 5Dh: bit 2) is set.
when an empty Response slot is encountered on all SDI[x] inputs (whichever
occurs first). The N counter is reset when the interrupt is generated.
0000h
00h
Intel® High Definition Audio Controller Registers (D27:F0)
Description
Description
Attribute:
Size:
Size:
Attribute:
Intel
R/W
16 bits
R/W
8 bits
®
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