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參數(shù)資料
| 型號： | WM8722 |
| 廠商： | Wolfson Microelectronics |
| 英文描述： | Stereo DAC with Integrated Tone Generator and Line/Variable Level Outputs |
| 中文描述： | 立體聲DAC，具有集成的音調(diào)發(fā)生器和線/變平輸出 |
| 文件頁數(shù)： | 16/23頁 |
| 文件大小： | 438K |
| 代理商： | WM8722 |
WM8722
Advanced Information
WOLFSON MICROELECTRONICS LTD
AI Rev 1.5 May 2000
16
REGISTER
NAME
TFREQ
Register 0
REG
ADDRESS
BIT NAME
DESCRIPTION
DEFAULT VALUE
1
000 0000
F[14:0]
DAL[7:0]
LDL
DAR[7:0]
LDR
Tone frequency value
DAC attenuation data for left channel
Attenuation data load control for left channel
DAC attenuation data for right channel
Attenuation data load control for right
channel
Left and right DACs soft mute control
De-emphasis control
Power off control
Input audio data bit length select
Output mode select
Audio data format select
Polarity of LRCIN (pin 7) select
Attenuator control
Left mixer 1 attenuation data
Left mixer mute
Right mixer 1 attenuation data
Right mixer mute
Left volume 2 attenuation data
000 0000 0000 0000
111 1111 (0dB)
0
111 1111 (0dB)
0
Register 1
000 0001
Register 2
000 0010
MU
DE
PWD
IW[1:0]
PL[3:0]
I2S
LRP
ATC
MTRIML[4:0]
MUTE
MTRIMR[4:0]
MUTE
LVOL[6:0]
ZCEN
BOTH
RVOL[6:0]
ZCEN
BOTH
LMXSEL
M6DB0
BOTH
RMXSEL
M6DB1
BOTH
LVMXSEL
M6DB2
BOTH
RVMXSEL
M6DB3
BOTH
TTIM[7:0]
TVOL[4:0]
MUTE
TFIN
SQR
F2F
0 (not muted)
0 (de-emph off)
0 (power on)
00 (16 bit)
1001 (normal stereo)
0 ( NORMAL format)
0
0
10111 (0dB)
0 (not mute)
10111 (0dB)
0 (not mute)
1111 001 (0dB)
Register 3
000 0011
Register 4
000 0100
Register 5
000 0101
Register 6
000 0110
Register 7
000 0111
Right volume 2 attenuation data
1111 001 (0dB)
Register 8
000 1000
Left mixer output mux control
M6DB for left mix output
11100 (normal stereo)
0 (0dB)
Register 9
000 1001
Right mixer output mux control
M6DB for right mix output
11100 (normal stereo)
0 (0dB)
Register 10
000 1010
Left variable output mux control
M6DB for left variable output
11100 (normal stereo)
0 (0dB)
Register 11
000 1011
Right variable output mux control
M6DB for right variable output
11100 (normal stereo)
0 (0dB)
Register 12
Register 13
000 1100
000 1101
Tone duration
Tone amplitude
Tone mute
Tone burst finish on zero cross
Tone sine or square wave
Tone one cycle at F, two cycle at 2xF
000 0000 (no tone)
11111 (max output)
0 (not muted)
0 (finish on full cycle)
0 (sine wave)
0 (normal F)
Table 6. Internal Register Mapping
REGISTER TFREQ
TONE FREQUENCY
This is the special register of 15 bit length with a single bit address, to allow values for the selected
tone frequency from 1Hz to 32767Hz to be written in one word. Writing 0 turns off the tone.
F
TONE
= (F
TCLK
x T
FREQ [15:0]
)/27x10
6
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