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| 型號： | ATJ2073 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | The ATJ2073 is a single-chip highly-intergrated digital music system solution for devices such as dedicated audio players, PDAs, and cell phones |
| 中文描述： | 在ATJ2073是一種單芯片高intergrated數(shù)字音樂的設(shè)備系統(tǒng)，如專用的音頻播放器，PDA和手機解決方案 |
| 文件頁數(shù)： | 26/45頁 |
| 文件大?。?/td> | 690K |
| 代理商： | ATJ2073 |
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ATJ2073
Data Sheet
Page 26 of 45
Actions Semiconductor Co.,LTD
Figure 7.3. Preamble Forms
Figure 7.4. Sub-frame Format
5.8 Power Management Unit (PMU)
PMU consists of DC-DC converter and regulator and battery monitor.
ATJ2073 need two power trails if work rightly, VDD (Core Power) and VCC (I/O Power). The power level
is decided by external voltage-divided resistance network . Due to describe clearly , we assume VDD=2.35V,
VCC=3.15V.
There are two battery modes with ATJ2073, one-battery mode and two-battery mode, selected by BATSEL.
In one-battery mode, if pin VBAT > 0.8V, some internal circuit (C1) begin to work first and it will rise up
VDD. When VDD reaches 2.35V, that internal circuit (C1) stops and another circuit (C2) takes over the
PFM for both VDD and VCC DC-DC converter.
In two-battery mode, if pin VBAT > 1.3V, the internal regulator is enabled to supply VDD. If 0.8V < VBAT
< 1.3V, C2 will stimulate VDD DC-DC converter to maintain VDD. The judgement between VBAT and
1.3V must have hysteresis for preventing ATJ2073 from unstable toggle between regulator mode and
DC-DC mode. The VCC DC-DC converter always runs to maintain VCC.
Battery monitor compares the battery voltage at the VBAT pin with four reference voltage pins named VL0,
VL1, VL2, VL3. The four reference voltages are decided by external resistance network. For normal dry
battery (1.5V) , the value can be : 1.4V, 1.3V, 1.15V, and 1.05V.
If VBAT < VL3, ATJ2073 will go into STANDBY mode;
If VBAT < 0.8V, ATJ2073 will go into OFF mode, but the low frequency OSC and RTC timer are still
active.
You can disable the clock of block when you do not use that block. Even more you can stop all the clock,
but low frequency OSC, while you design appropriately.
Preamble
AuxData
V U C P
L
M
Audio Data
0
3 4
7 8
2728293031
bit
Sub-frame
Validity
User Data
Channel Status Data
Parity Bit
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相關(guān)代理商/技術(shù)參數(shù) |
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|---|---|
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| ATJ2085 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:ATJ2085 is a single-chip for flash-based digital music player |
| ATJG523VTR | 功能描述:觸覺開關(guān) SW TACT SPST 0.05A 12VDC RoHS:否 制造商:C&K Components 工作力:2 N 執(zhí)行器:Round 電流額定值:50 mA 電壓額定值 DC:32 V 電壓額定值 AC: 功率額定值:1 VA 接地端子:Yes 觸點形式:SPST-NO 開關(guān)功能: 安裝風格:SMD/SMT 安裝方向:Right 晶體管管座高度: 顏色: 照明:Not Illuminated 照明顏色: 封裝: |
| ATJG524VTR | 功能描述:觸覺開關(guān) SW TACT SPST 0.05A 12VDC RoHS:否 制造商:C&K Components 工作力:2 N 執(zhí)行器:Round 電流額定值:50 mA 電壓額定值 DC:32 V 電壓額定值 AC: 功率額定值:1 VA 接地端子:Yes 觸點形式:SPST-NO 開關(guān)功能: 安裝風格:SMD/SMT 安裝方向:Right 晶體管管座高度: 顏色: 照明:Not Illuminated 照明顏色: 封裝: |
| ATJG533VTR | 功能描述:觸覺開關(guān) SW TACT SPST 0.05A 12VDC RoHS:否 制造商:C&K Components 工作力:2 N 執(zhí)行器:Round 電流額定值:50 mA 電壓額定值 DC:32 V 電壓額定值 AC: 功率額定值:1 VA 接地端子:Yes 觸點形式:SPST-NO 開關(guān)功能: 安裝風格:SMD/SMT 安裝方向:Right 晶體管管座高度: 顏色: 照明:Not Illuminated 照明顏色: 封裝: |
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