ak4671 AKM Semiconductor, Inc., ak4671 Datasheet - Page 103

• Manufacturer Part Number: ak4671
• Description: Stereo Codec With Mic/rcv/hp-amp
• Manufacturer: AKM Semiconductor, Inc.

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AK4671 supports dual PCM I/F (PCM I/F A & PCM I/F B) that supports 3 kind of I/F (16bit Linear, 8bit A-Law and 8bit
μ -Law) independently
Four types of data formats are available and are selected by setting the FMTA1-0 and FMTB1-0 bits independently
84
Mode, the serial data is MSB first. PCM I/F formats can be used in both master and slave modes. SYNCA/B and
BICKA/B are output from the AK4671 in master mode, but must be input to the AK4671 in slave mode.
In modes 2 and 3, the SDTOA/B is clocked out on the falling edge (“ ↓ ”) of BICKA/B and the SDTIA/B is latched on the
rising edge (“ ↑ ”).
In Modes 0 and 1, PCM I/F A timing is changed by BCKPA and MSBSA bits,and PCM I/F B timing is changed by
BCKPB and MSBSB bits.
When BCKPA bit = “0”, the SDTOA is clocked out on the rising edge (“ ↑ ”) of BICKA and the SDTIA is latched on the
falling edge (“ ↓ ”). When BCKPA bit = “1”, the SDTOA is clocked out on the falling edge (“ ↓ ”) of BICKA and the
SDTIA is latched on the rising edge (“ ↑ ”).
MSBSA bit can shift the MSB position of SDTOA and SDTIA by half period of BICKA.
When BCKPB bit = “0”, the SDTOB is clocked out on the rising edge (“ ↑ ”) of BICKB and the SDTIB is latched on the
falling edge (“ ↓ ”). When BCKPB bit = “1”, the SDTOB is clocked out on the falling edge (“ ↓ ”) of BICKB and the
SDTIB is latched on the rising edge (“ ↑ ”).
MSBSB bit can shift the MSB position of SDTOB and SDTIB by half period of BICKB.
MS0666-E-00
PCM I/F A & B Format
and
Table
Mode
Mode
0
1
2
3
0
1
2
3
85). In 16bit Linear mode, the serial data is MSB first, 2’s complement format. In 8bit A-Law and μ -Law
FMTA1
FMTB1
Mode
Mode
(Table 82
0
1
2
3
0
1
2
3
0
0
1
1
0
0
1
1
and
LAWA1
LAWB1
Table 82. PCM I/F A Mode (N/A: Not available)
Table 83. PCM I/F B Mode (N/A: Not available)
FMTA0
FMTB0
Table
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
83).
Table 84. PCM I/F A Format
Table 85. PCM I/F B Format
LAWA0
LAWB0
Short Frame Sync
Long Frame Sync
Short Frame Sync
Long Frame Sync
MSB justified
MSB justified
0
1
0
1
0
1
0
1
Format
Format
- 103 -
I
I
2
2
S
S
16bit Linear
16bit Linear
8bit A-Law
8bit A-Law
8bit μ -Law
8bit μ -Law
Format
Format
BICKA
≥ 16fs2
≥ 16fs2
≥ 32fs2
≥ 32fs2
BICKB
≥ 16fs2
≥ 16fs2
≥ 32fs2
≥ 32fs2
N/A
N/A
See
See
See
See
Figure 92
Figure 93
Figure 92
Figure 93
Figure
Figure
Table 86
Table 88
Table 87
Table 89
(default)
(default)
(default)
(default)
[AK4671]
2007/10
(Table