- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98145 > ST72652C4T1/XXX (STMICROELECTRONICS) 8-BIT, MROM, MICROCONTROLLER, PQFP48 PDF資料下載
參數(shù)資料
| 型號(hào)： | ST72652C4T1/XXX |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, MICROCONTROLLER, PQFP48 |
| 封裝： | 7 X 7 MM, ROHS COMPLIANT, TQFP-48 |
| 文件頁(yè)數(shù)： | 89/161頁(yè) |
| 文件大?。?/td> | 2656K |
| 代理商： | ST72652C4T1/XXX |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)當(dāng)前第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)第138頁(yè)第139頁(yè)第140頁(yè)第141頁(yè)第142頁(yè)第143頁(yè)第144頁(yè)第145頁(yè)第146頁(yè)第147頁(yè)第148頁(yè)第149頁(yè)第150頁(yè)第151頁(yè)第152頁(yè)第153頁(yè)第154頁(yè)第155頁(yè)第156頁(yè)第157頁(yè)第158頁(yè)第159頁(yè)第160頁(yè)第161頁(yè)
ST72651AR6
33/161
Doc ID 7215 Rev 4
POWER SUPPLY MANAGEMENT (Cont’d)
6.4.2.2 Switching from USB Mode to Stand-
Alone Mode
In USB Mode, when the user unplugs the USB ca-
ble, the voltage level drops on the USBVDD line.
The on-chip Power Supply Manager generates a
PLG interrupt when USBVDD reaches USBVIT-.
The user program then can finish the current
processing, and MUST generate a software RE-
SET.
Caution: Care should be taken as during this peri-
od the microcontroller clock is provided from the
PLL output. Functionality in this mode is not guar-
anteed for voltages below VPLLmin.
Caution: When the VDDF is supplied externally by
a voltage higher than the detector thresholds, the
USBVDD voltage continues to be driven by the pro-
tection diode between VDDF and USBVDD. In this
configuration, the detector will not detect a voltage
drop and can not be used.
Software must ensure that the software RESET is
generated before VDD. drops below VPLLmin. Fail-
ing to do this will cause the clock circuitry to stop,
freezing the microcontroller operations.
Once the user program has executed the software
reset, the microcontroller goes into reset state and
all I/O ports go into floating input mode.
During and after this (software induced) reset
phase, the USBEN pin is put in high impedance by
hardware. It causes the USB SWITCH to be
turned OFF, so USBVDD is disconnected from
VDD. The PLL is automatically stopped and the in-
ternal frequency is provided by a division of the
crystal frequency. Refer to Figure 24.
The microcontroller is still powered by the residual
USBVDD voltage (higher than step-up converter
set output level). This VDD voltage decreases dur-
ing the reset phase until it reaches the step-up
converter set output voltage. At that time, step-up
converter resumes operation, and powers the ap-
plication.
Caution: In order to avoid applying excessive volt-
age to the Storage Media, a minimum delay must
be ensured during (and after if needed) the reset
phase, prior to switching ON the external STOR-
AGE switch.
1
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST7267R8T1L/XXX | 16-BIT, MROM, 30 MHz, RISC MICROCONTROLLER, PQFP64 |
| ST7267C8T1/XXX | 16-BIT, MROM, 30 MHz, RISC MICROCONTROLLER, PQFP48 |
| ST72774S9T1/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PQFP44 |
| ST72E734J6D0 | 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CDIP42 |
| ST72T774S9T1 | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP44 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST7265X-EVAL/MS | 制造商:STMicroelectronics 功能描述:ST6 EVAL BD - Bulk |
| ST7265X-EVAL/PFD | 制造商:STMicroelectronics 功能描述:USB FLASH EVAL - Bulk |
| ST7266 | 制造商:6940 功能描述:ST7266 |
| ST7267C8T1L | 制造商:STMicroelectronics 功能描述: |
| ST72681/R12 | 制造商:STMicroelectronics 功能描述:CONTROLLER FOR HIGH-PERFORMANCE BUS-POWERED USB 2.0 FLASH DR - Trays |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。