alc888s Realtek Semiconductor Corporation, alc888s Datasheet - Page 30

• Manufacturer Part Number: alc888s
• Description: 7.1+2 Channel High Definition Audio Codec With Two Independent S/pdif-out
• Manufacturer: Realtek Semiconductor Corporation

7.3.3.
controller
7.4.
7.4.1.
There are two types of verbs: one with 4-bit identifiers (4-bit verbs) and 16-bits of data, the other with
12-bit identifiers (12-bit verbs) and 8-bits of data. Table 10 shows the 4-bit verb structure of a command
stream sent from the controller to operate the codec. Table 11 is the 12-bit verb structure that gets and
controls parameters in the codec.
7.1+2 Channel High Definition Audio Codec
w/Two Independent S/PDIF-OUT
SYNC
BCLK
RST#
Exit from Reset
SDIx
The codec will stop driving the SDI during this turnaround period
The controller releases the SDI after the CAD has been assigned
Normal operation state
The codec drives SDI high at the last bit of SYNC to request a Codec Address (CAD) from the
Bit [39:32]
Bit [39:32]
Reserved
Reserved
The controller drives SDI to assign a CAD to the codec
Verb and Response Format
Connection Frame
Codec Initialization Sequence
Command Verb Format
Frame SYNC
Drives SDIx
Codec
1
Codec Address
Table 11. 40-Bit Commands in 12-Bit Verb Format
Codec Address
Table 10. 40-Bit Commands in 4-Bit Verb Format
Bit [31:28]
Bit [31:28]
Turnaround
(477 BCLK
2
Codec
Max.)
Figure 15. Codec Initialization Sequence
Turnaround Frame
(Non-48kHz Frame)
3
Frame SYNC
Controller Drives SDIx
Bit [27:20]
Bit [27:20]
Node ID
22
Node ID
SD0 SD1
4
5
(Non-48kHz Frame)
SD14
Address Frame
6
Bit [19:8]
Bit [19:16]
Verb ID
Turnaround
Verb ID
(477 BCLK
Controller
Max.)
7
ALC888S & ALC888SDD
Track ID: JATR-1076-21
8
Frame SYNC
Codec Drives SDIx
Bit [15:0]
Bit [7:0]
Payload
Payload
Normal Operation
Datasheet
Response
Rev. 1.2