Depending on power supply scheme, C
參數(shù)資料
型號(hào)： AT85C51SND3B1-7FTUL
廠商： Atmel
文件頁數(shù)： 33/119頁
文件大?。?/td> 0K
描述： IC DECODER/ENCODER DGTL 100CBGA
標(biāo)準(zhǔn)包裝： 90
類型： 音頻編碼器/解碼器
應(yīng)用： 移動(dòng)電話，手機(jī)，視頻顯示器
電壓 - 電源，數(shù)字： 1.65 V ~ 3.6 V
安裝類型： 表面貼裝
封裝/外殼： 100-TFBGA
供應(yīng)商設(shè)備封裝： 100-CTBGA（9x9）
包裝： 托盤
20
AT85C51SND3B
7632D–MP3–01/07
Schematic
Figure 6. Regulator Connection
Note:
Depending on power supply scheme, CLV may replace CDC capacitor (see Figure 8).
Low Voltage DC-DC in
AT85C51SND3B2
The low voltage output DC-DC converter supplies power to the internal device and
external devices through LVDD power pin. It operates from a single AAA battery. Its
nominal voltage output is 1.8V.
DC-DC Start-Up
DC-DC start-up is done by asserting the DCPWR input until the voltage reaches its
nominal value (see Section “Power Fail Detector”) and firmware starts execution and
sets the DCEN bit in PCON to maintain the DC-DC enabled. DCPWR input can then be
released. As shown in Figure 8 DCPWR input is asserted by pressing a key connected
to BVSS.
Figure 7. DC-DC Start-Up Phase
DC-DC Shut-Down
DC-DC shut-down is done by two different ways:
Clearing the DCEN bit while DCPWR pin is de-asserted
Detecting the presence of an internal or external 3V supply, e.g. when the device is
connected to USB, DC-DC is disabled to save battery power(1).
Note:
1. If DCEN bit is left set, the DC-DC will restart as soon as the USB power supply
disappears.
DC-DC Connection
Figure 8 shows how to connect external components, inductance and components
value along with power characteristics are specified in the section “DC characteristics”.
Figure 8. Battery DC-DC Connection
Note:
Depending on power supply scheme, CDC1 may replace CLV capacitor (see Figure 6).
HVDD
CHV
VSS
RLVDD
CLV
(*)
VSS
DCPWR
DCEN
DC-DC
Start-Up
LVDD
Firmware
Start-Up
DC-DC
On
DC-DC
Off
LVDD
BVDD
BVSS
B
a
tt
e
ry
LDC
DCLI
C
DC1
(*)
VSS
RLVDD
CVSS
C
DC2
DCPWR
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
AT85C51SND3B1N-DDV 功能描述:音頻 DSP Microcontroller RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
AT85C51SND3B1N-RTTUL 功能描述:音頻 DSP Microcontroller RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
AT85C51SND3B1-RTTUL 功能描述:音頻 DSP MP3/WMA USB2.0 w/o DAC+DC/DC RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
AT85C51SND3B2-RTTUL 功能描述:音頻 DSP Microcontroller RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube
AT85C51SND3BX 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:MP3 Microcontrollers
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