TC94A04AFG Datasheet, PDF (25/42 Pages) Toshiba Semiconductor – 1 chip Audio Digital Processor

TC94A04AFG/AFDG
Command-4Dh (0100 1101): DAC-CS (1F1Fh*)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0
0
0
ATTC ATTC ATTC ATTC ATTC
4
3
2
1
0
0
0
0
ATTS ATTS ATTS ATTS ATTS
4
3
2
1
0
Bit
Name
Description
Value
Operation
D15
to
⎯
Fixed to 0 (zero)
⎯
⎯
D13
Code : 00h 01h 02h ･･･ 18h 19h ･･･ 1Fh
D12
ATTC
00h
to
DAC C-ch attenuator value
to ATT (dB) : 0 −1 −2
−24 ca.−60 ca.−60
D8
[4:0]
1Fh*
Initial value: 1Fh
D7
to
⎯
Fixed to 0 (zero)
⎯
⎯
D5
D4
ATTS
Code : 00h 01h 02h ･･･ 18h 19h ･･･ 1Fh
00h
to
DAC-Sch attenuator value
to ATT (dB) : 0 −1 −2
−24 ca.−60 ca.−60
D0
[4:0]
1Fh*
Initial value: 1Fh
Command-4Eh (0100 1110): DF-ATT (007Fh*)
D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0
0
0
0
0
0
0
0
0 ATL6 ATL5 ATL4 ATL3 ATL2 ATL1 ATL0
Bit
Name
Description
D15
to
⎯
Fixed to 0 (zero)
D7
Value
Operation
⎯
⎯
Initial value: 7Fh (level = −∞)
LEVEL = 20 × log (ATL/128)
D6
ATL
to
DF attenuator value
D0
[6:0]
00h
to
7Fh*
Code
00h
01h
02h
to
0Dh
1Ah
25h
to
3Fh
to
7Dh
7Eh
7Fh
ATL
Level
7Fh
0.00dB
7Eh
−0.14dB
7Dh
−0.21dB
to
to
72h
−1.01dB
65h
−2.06dB
5Ah
−3.06dB
to
to
40h
−6.02dB
to
to
02h
−36.12dB
01h
−42.14dB
00h
−∞
25
2005-09-28