參數(shù)資料
型號(hào): UPD9930G-22
廠商: NEC Corp.
元件分類: Codec
英文描述: LINEAR CODEC FOR DIGITAL CELLULAR TELEPHONE
中文描述: 線性編解碼器數(shù)字蜂窩電話
文件頁數(shù): 14/78頁
文件大?。?/td> 336K
代理商: UPD9930G-22
μ
PD9930
14
Register address
AMPCR
D7
D6
D5
D4
D3
D2
D1
D0
0
0
0
MICPDB
MICPDB
0
Microphone amplifier power control
Power down
XAUXPDB REC1PDB RAUXPDB RINGPDB
1
Power up
XAUXPDB
0
Accessory input amplifier power control
Power down
1
Power up
REC1PDB
0
Receiver amplifier 1 power control
Power down
1
Power up
RAUXPDB
0
Accessory output amplifier power control
Power down
1
Power up
RINGPDB
0
Ringer output control
Sets output at low level.
1
Output enable
(3) Input/output amplifier control register (AMPCR)
This is a 5-bit register for power up/down control of each input/output amplifier (not including receiver amplifier
2), and for ringer output ON/OFF control.
Remark
For information on power up/down control of receiver amplifier 2, refer to
4.1.1 Voice Send Analog Gain/
Receiver Amplifier 2 Control Register (TXGCR)
.
Figure 2-6 Input/Output Amplifier Control Register
Remarks 1.
In the stand-by mode, all amplifiers enter the power down state regardless of input/output control register
settings. However, register contents are held unless reset or written, so when the stand-by mode is
cleared by power up command, the command prior to the stand-by mode is resumed.
2.
The microphone and accessory amplifiers cannot enter the power up (D4 = D3 = "1") state at the same
time.
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