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ST7265X 数据表(PDF) 39 Page - STMicroelectronics

部件名 ST7265X
功能描述  LOW-POWER, FULL-SPEED USB 8-BIT MCU WITH 32K FLASH, 5K RAM, FLASH CARD I/F, TIMER, PWM, ADC, I2C, SPI
PDF  166 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST7265X 数据表(HTML) 39 Page - STMicroelectronics

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POWER SUPPLY MANAGEMENT (Cont’d)
6.4.4 Power Management Application Example
In the example shown in Figure 28, the VDD supply
is provided by a step up. In this case the step up
must be capable of tolerating voltages up to 5.5V
on its Vout pin.
Figure 28. Dual Power Supply Application Example (low current Storage Media)
MPEG
DAC
Decoder
Step Up
1.2V
I2S
VCC
USB
DP
DM
KEYBOARD
USBVDD
DTC
I2C
MP3
1.5Mbit/s Max
USB port
2M - 128MByte
FLASH
VDDF
STORAGE
VPP
GND
USB
10
µF
Cbus=40pF max
2
4
LCD DISPLAY
LIGHT
Audio
AMP
TDA7474
STA013
4.7
µF
50
µH
VDD
USBVDD
POWER
USB
MANAGEMENT
5V
DP
DM
GND
100nF
Vdd in Stand-Alone mode
Regulator output (2.8 - 3.5V) in USB mode
12V for
STORAGE Switch
USBVDD Switch
DEC Switch
LED
level translator
Flash prog.
REGULATOR
I/O
LOGIC
I2C
=4.0-5.5V
MEDIA
THRESH
USBEN
4.7µF
1



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