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| 型号： | TLV320AIC27CPFB |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP48 |
| 封装： | PLASTIC, TQFP-48 |
| 文件页数： | 3/54页 |
| 文件大小： | 732K |
| 代理商： | TLV320AIC27CPFB |
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TLV320AIC27
STEREO AUDIO CODEC
SLAS253A – MARCH 2000 – REVISED SEPTEMBER 2000
11
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
variable sample rate support (continued)
Table 2 shows which registers control which DAC rates, versus mode and ID selected.
Table 2. Variable Rate Register Location Versus Mode and ID
MODE
ID
FRONT DAC RATE
REGISTER
REAR DAC RATE
REGISTER
ADC RATE
REG
00 and 01
2Ch
Rev 2.1 mode (00)
10
2Eh
32h
11
2Ch (center) and 30h (LFE)
00 and 01
2Ch
Rev 2.1 6-channel mode (01)
10
2Eh
32h
11
2Ch (center) and 30h (LFE)
00 and 01
2Ch
2Eh
Quad mode (10)
10
2Eh
2Ch
32h
11
2Ch (center) and 30h (LFE)
2Eh
gain control register location versus mode and ID
Depending on the operational mode and ID of the device, the various gain control registers have locations in
the register map that may change. For example, if the codec is configured as ID 10, it means that the device
will be converting the rear surround DAC data. In this case, the surround DAC volume word written to register
38h is now used to control the master volume control, rather than the normal master volume 02h. In addition,
when the surround volume mute control is written as demute, mute in the DAC PGA register 18h is automatically
overridden. Then the user does not have to make an unexpected additional write to register 18h to demute the
DAC PGA.
Table 3. Gain Control Register Location Versus Mode and ID
PGA
CODEC
ID
CONTROL
REG
REV 2.1 MODE (0x)
MUTE DEFAULT
QUAD MODE (10)
MUTE DEFAULT
MODEM MODE (11)
Front DAC PGA
0x
10
11
18h
Muted (bit 15)
AND with 38h, 7, 15
AND with 36h, 7, 15
Muted (bit 15)
AND with 38h, 7, 15
AND with 36h, 7, 15
Muted (bit 15)
AND with 38h, 7, 15
AND with 36h, 7, 15
Rear DAC PGA
0x
10
11
70h
Muted (bit 15) and
powered off
Not muted (bit 15)
AND with 02h, 15
AND with 38h, 7, 15
AND with 04h, 15
Front mixer
0x
10
11
72h
Not muted (bit 15)
Rear mixer
0x
10
11
74h
Permanently muted
Not muted (bit 15)
Permanently muted
Front volume
0x
10
11
02h
38h
36h
Muted (bit 15)
Muted (7 and 15)
Muted (bit 15)
Muted (7 and 15)
Muted (bit 15)
Muted (7 and 15)
Rear volume
0x
10
11
04h
Muted (bit 15) Rev 2.1
switch enabled
Muted (7 and 15)
Muted (bit 15)
Muted (7 and 15)
Muted (bit 15)
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