alc272 Realtek Semiconductor Corporation, alc272 Datasheet - Page 28

• Manufacturer Part Number: alc272
• Description: 4 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.
4 Channel High Definition Audio Codec
BCLK
SYNC
Exit from Reset
RST#
SDIx
The codec stops driving the SDI during this turnaround period
The controller releases the SDI after the CAD has been assigned
Normal operating 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
Codec Initialization Sequence
Command Verb Format
Connection Frame
Frame SYNC
Drives SDIx
Codec
1
Codec Address
Codec Address
Bit [31:28]
Bit [31:28]
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
Max.)
Figure 13. Codec Initialization Sequence
Turnaround Frame
(Non-48kHz Frame)
3
Frame SYNC
Controller Drives SDIx
Bit [27:20]
Bit [27:20]
Node ID
Node ID
20
SD0 SD1
4
5
(Non-48kHz Frame)
SD14
Address Frame
6
Bit [19:16]
Bit [19:8]
Verb ID
Verb ID
( 477 BCLK
Turnaround
Controller
Max.)
7
Track ID: JATR-1076-21
8
Frame SYNC
Codec Drives SDIx
Bit [15:0]
Bit [7:0]
Payload
Payload
Normal Operation
Datasheet
Response
ALC272
Rev. 1.0