参数资料
型号: MAS3549F
厂商: MICRONAS SEMICONDUCTOR HOLDING AG
元件分类: Codec
英文描述: MAS 35x9F MPEG Layer 2/3, AAC Audio Decoder, G.729 Annex A Codec
中文描述: 新加坡金融管理局35x9F的MPEG 2 / 3层,AAC音频解码器,G.729的附件A编解码器
文件页数: 45/92页
文件大小: 1186K
代理商: MAS3549F
DATA SHEET
MAS 35x9F
Micronas
June 30, 2004; 6251-505-1DS
45
3.4. Audio Codec Access Protocol
The MAS 35x9F has 16-bit wide registers for the con-
trol of the audio codec. These registers are accessed
via the I
2
C subaddresses codec_write (6C
hex
) and
codec_read (6D
hex
).
3.4.1. Write Codec Register
The controller writes the 16-bit value (
d
= d3,d2,d1,d0)
into the MAS 35x9F codec register (
r
= r3,r2,r1,r0). A
list of registers is given in Table 3–16.
Example: Writing the value 1234
hex
into the codec reg-
ister with the number 00 1B
hex
:
<DW 6c 00 1b 12 34>
3.4.2. Read Codec Register
Reading the codec registers also needs a set-up for
the register address and an additional start condition
during the actual read cycle. A list of status registers is
given in Table 3–17.
S
DW
codec_write
r3,r2
r1,r0
P
d3,d2
d1,d0
W
A
A
A
A
A
A
1) send command
2) get register value
S
DW
S
DW
codec_write
r3,r2
r1,r0
P
codec_read
S
DR
N
A
P
W
A
A
A
A
W
A
A
W
A
d3,d2
d1,d0
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