參數(shù)資料
型號: ST72651R4
英文描述: ST7 - LOW-POWER. FULL-SPEED USB 8-BIT MCU WITH 32K FLASH. 5K RAM. FLASH CARD I/F. TIMER. PWM. ADC. I2C
中文描述: ST7的-低功耗。全速USB 8位32K快閃微控制器。 5K內(nèi)存。閃存卡的I /樓計(jì)時(shí)器。脈寬調(diào)制。 ADC的。的I2C
文件頁數(shù): 97/166頁
文件大小: 2089K
代理商: ST72651R4
ST7265x
36/166
POWER SUPPLY MANAGEMENT (Cont’d)
Figure 25. Power Supply Management: Dual Power Supply
USB MODE
STAND-ALONE
RESET
S/W
STAND-ALONE
USBVDD
VDD pin
PLL
48 MHz
CLOCK
CRYSTAL (12MHz)
PLL
CRYSTAL (12MHz)
S/W Reset
PLG INTERRUPT
ON
SUPPLY
USBVIT+
REQUEST
USBVIT-
STATUS
PROCESSING
12
1. Interrupt processing
2. Finish current processing
PROCESS.
STAND-ALONE
1 2
S/W Reset
PROCESSING
STAND-ALONE MODE
USBEN
HI-Z
voltage
SUPPLY
VOLTAGES
SOURCE
PLL OFF
PLL ON
PLL OFF
STABLE 48 MHz
UNDE
SIGNAL
ON/OFF
FINED3
NO CLOCK
3. PLL start-up time (automatically controlled by hardware following a software reset)
USB MODE
NO CLOCK
VPLLmin48
RESET
VIT+(LVD)
VIT-(LVD)
RST
4
4. PLL running with frequency in the range of 48 to 24 MHz (see section 13.3.3 on page 131)
1
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