alc882 Realtek Semiconductor Corporation, alc882 Datasheet - Page 30

• Manufacturer Part Number: alc882
• Description: 7.1+2 Channel High Definition Audio Codec
• Manufacturer: Realtek Semiconductor Corporation

7.3.3.
controller
7.4. Verb and Response Format
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
SYNC
BCLK
Exit from Reset
RST#
SDIx
The codec drives SDI high at the last bit of SYNC to request a Codec Address (CAD) from the
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 controller drives SDI to assign a CAD to the codec
Codec Initialization Sequence
Command Verb Format
Connection Frame
Bit [39:32]
Bit [39:32]
Frame SYNC
Reserved
Reserved
Drives SDIx
Codec
1
Table 11. 40-Bit Commands in 12-Bit Verb Format
Table 10. 40-Bit Commands in 4-Bit Verb Format
Turnaround
(477 BCLK
2
Codec Address
Codec
Codec Address
Max.)
Figure 14. Codec Initialization Sequence
(Non-48kHz Frame)
Turnaround Frame
Bit [31:28]
Bit [31:28]
3
Frame SYNC
Controller Drives SDIx
Bit [27:20]
Bit [27:20]
Node ID
Node ID
20
SD0 SD1
4
5
Bit [19:8]
Bit [19:16]
Verb ID
(Non-48kHz Frame)
Verb ID
SD14
Address Frame
6
Turnaround
(477 BCLK
Controller
Max.)
7
Track ID: JATR-1076-21
8
Bit [15:0]
Bit [7:0]
Payload
Payload
Frame SYNC
Codec Drives SDIx
ALC882 Series
Normal Operation
Datasheet
Response
Rev. 1.5