參數資料
型號： PCM3794
元件分類： Codec
英文描述： 16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier
中文描述： 16位，低功耗立體聲音頻編解碼器麥克風偏置，耳機，揚聲器放大器和數字
文件頁數： 20/63頁
文件大小： 915K
代理商： PCM3794
www.ti.com
Power-Supply Current
PCM3793
PCM3794
SLES193A–AUGUST 2006–REVISED SEPTEMBER 2006
Table 2. Recommended Power-On Sequence (continued)
STEP
REGISTER
SETTINGS
4C03h
4A01h
523Fh
5711h
4F0Ch
500Ch
–
49FFh
NOTE
17
18
19
20
21
22
23
24
Speaker amplifier shut down release
V
COM
power up
Analog front end (ADL, ADR, D2S, MCB, PG1, 2, 5, 6) power up
Analog input (MUX3, MUX4) select. Analog input (MUX1, MUX2) select
Analog input L-ch (PG3) volume (0 dB)
(2)
Analog input R-ch (PG4) volume (0 dB)
(2)
Any settings for other devices or wait time
(4)(5)
Speaker amplifier (SPL, SPR) power up
(5)
(4)
The PCM3793 requires time for V
to reach the common level from GND level. The delay depends on the capacitor value for V
COM
and the setting of register 90 CMT[1:0]. Wait time [s] = 4
×
C
×
R
The PCM3794 does not require this setting because it has no speaker output.
(5)
Table 3. Recommended Power-Off Sequence
STEP
REGISTER
SETTINGS
447Fh
457Fh
5132h
5811h
49FFh
5200h
5A10h
4A00h
–
5A00h
–
5A20h
–
5A30h
49E0h
4800h
4900h
–
NOTE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
DAC L-ch digital soft-mute enable
(1)
DAC R-ch digital soft-mute enable
(1)
ADC L-ch/R-ch digital soft-mute enable, ADC audio interface format (left-justified)
(2)
Analog mixer input (SW2, SW5) Select
Headphone amplifier (HPL, HPR, HPC) power up
(4)
, speaker amplifier (SPL, SPR) power up
(3)(4)
Analog front end (ADL, ADR, D2S, MCB, PG1, 2, 5, 6) power down
V
COM
ramp up/down time control, PG1, PG2 gain control (0 dB)
V
COM
power down
Wait time (100 ms)
V
COM
ramp up/down time control
Wait time (100 ms)
V
COM
ramp up/down time control
Wait time (4000 ms)
V
COM
ramp up/down time control
Headphone amplifier (HPL, HPR, HPC) power down, speaker amplifier (SPL, SPR) power down
Analog mixer (MXL, MXR) power down
DAC (DAL, DAR) and analog bias power down
Turn off all power supplies
(5)
(1)
(2)
(3)
(4)
(5)
Any level is acceptable for volume or attenuation.
Audio interface format should be set according to DSP or decoder.
PCM3794 has no speaker amplifier.
These modules must be powered up during the power-down sequence.
Power supply sequencing is not required. It is recommended to turn off all power supply after register settings with system clock input.
The current consumption of the PCM3793/94 depends on power up/down status of each circuit module. In order
to reduce the power consumption, disabling each module is recommended when it is not used in an application
or operation.
Table 4
shows the current consumption in some states.
20
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相關代理商/技術參數
參數描述
PCM-3794 制造商:AAEON 制造商全稱:AAEON 功能描述:PCI-104 2-slot PCMCIA Module /Three IEEE-1394 Port Daughter Board
PCM3794A 制造商:BB 制造商全稱:BB 功能描述:16-Bit, Low-Power Stereo Audio CODEC With Microphone Bias, Headphone, and Digital Speaker Amplifier
PCM-3794-A10 制造商:AAEON Technology Inc 功能描述:PCI-104 2-SLOT PCMCIA (HOT SWAP) - Bulk
PCM-3794-A10-01 制造商:AAEON Technology Inc 功能描述:PCI-104 2-SLOT PCMCIA (HOT SWAP) & PCM-3594 IEEE-1394 3-PORT - Bulk
PCM3794ARHB 制造商:Texas Instruments 功能描述:AUD CODEC 2ADC / 2DAC 16BIT 32QFN EP - Tape and Reel
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