Cirrus Logic CS4207 - Manual (Page 102)

102 DS880F4
CS4207
6.11.9 Unsolicited Response Control
Get Parameter Command Format:
Set Parameter Command Format:
Response Format:
Bits [31:0] are sticky and will not be reset by a Link Reset or a Codec Reset:
Unsolicited Response Format:
2:0 Read/Write 000b
VREF Enable (VREFE): This field selects one of
the possible states for the VREF signal(s). The
pin associated with this function is MICBIAS.
If the value written to this control does not corre-
spond to a supported value (‘000’b, ‘001’b,
‘010’b or ‘100’b), the VREFE bits must retain the
previous value.
‘000’b = Hi-Z
‘001’b = 0.5*VA
‘010’b = GND
‘100’b = 0.8*VA
Bits [31:28] Bits [27:20] Bits [19:8] Bits [7:0]
CAd = X Line In 1 Node ID=0Ch
Mic In 1 Node ID=0Dh
Verb ID = F08h Payload = 00h
Bits [31:28] Bits [27:20] Bits [19:8] Bits [7:0]
CAd = X Line In 1 Node ID=0Ch
Mic In 1 Node ID=0Dh
Verb ID = 708h Payload = xxh
Bits Type Default Description
31:8 Read Only 000000h Reserved
7 Read/Write 0b
Enable: Controls the actual generation of Unso-
licited Responses. 1 is enable; 0 is disable.
6 Read Only 0b Reserved
5:0 Read/Write 000000b
Tag: Is a 6 bit value assigned and used by soft-
ware to determine what codec node generated
the unsolicited response. The value programmed
into the Tag field is returned in the top 6 bits
(31:26) of every Unsolicited Response gener-
ated by this node.
Bits [31:26] Bits [25:0]
Tag Response
Bits Type Default Description