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參數(shù)資料
| 型號(hào)： | ST72F651AR6T1 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, FLASH, MICROCONTROLLER, PQFP64 |
| 封裝： | 10 X 10 MM, ROHS COMPLIANT, TQFP-64 |
| 文件頁(yè)數(shù)： | 91/161頁(yè) |
| 文件大?。?/td> | 2656K |
| 代理商： | ST72F651AR6T1 |
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ST72651AR6
35/161
Doc ID 7215 Rev 4
POWER SUPPLY MANAGEMENT (Cont’d)
6.4.3 Storage Media Interface I/Os
The microcontroller is able to drive Storage Media
through an interface operating at a different volt-
age from the rest of the circuit.
This is achieved by powering the Storage Media
interface I/O circuitry through a specific supply rail
connected to VDDF pin. The VDDF pin can be used
either as an input or output.
If the on-chip voltage regulator is off, power to the
interface I/Os should be provided externally to the
VDDF pin. This should be the case when in Stand-
Alone Mode, or in USB mode when the current re-
quired to power the Storage Media is above the
current capacity of the on-chip regulator.
If the on-chip voltage regulator is on, it powers the
interface I/Os, and VDDF pin can supply the Stor-
age Media. This is recommended in USB Mode,
when the current required to power the Storage
Media is within the capacity of the on-chip regula-
tor.
Caution: If VDDF is supplied externally, the regu-
lator must not be enabled.
Important Note:
If VDDF is not present, all VDDF-driven I/Os cannot
be used and are tied to ground. Refer to Section
9.2.4 for more details.
Application Example:
Stand-Alone Mode
– The Storage Media interface supply is powered
by VDD enabled by an external switch which con-
nects VDD to VDDF. This switch can be driven by
any True Open Drain I/O pin and controlled by
user software.
– The on-chip voltage regulator must be disabled
to avoid any conflict and to decrease consump-
tion (reset the REGEN bit in the PCR register).
USB Mode
– In this case the core of the microcontroller is run-
ning from the USB bus power or the self power
supply. VDD and USBVDD pins are supplied with
a voltage from 4.0 to 5.5V.
– The Storage Media Interface can be powered
through the on-chip regulator (providing power to
the I/O pins and output on pin VDDF) if the current
requirement is within the output capacity of the
on chip regulator.
– The regulator output voltage can be pro-
grammed to 2.8V, 3.3V, 3.4V or 3.5 Volts, de-
pending on the Storage Media specifications.
(see VSET[1:0] bits in PCR register description)
– Should the current requirement for the Storage
Media be higher than the current capacity of the
on chip regulator, an external regulator should be
used. Thus the on-chip voltage regulator must be
disabled to avoid any conflict (reset the REGEN
bit in the PCR register).
Caution: The user should ensure that VDD does
not exceed the maximum rating specified for the
Storage Media VDDF max when switching STOR-
AGE switch on.
1
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST72F651AR6T1E | 功能描述:8位微控制器 -MCU Flash 32K USB/DTC/I2 RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT |
| ST72P262M6/OZXTR | 制造商:STMicroelectronics 功能描述:ST72P262M6/OZXTR |
| ST72P324TA/OBZTR | 制造商:STMicroelectronics 功能描述: |
| ST72P324TA/OHXTR | 制造商:STMicroelectronics 功能描述: |
| ST72P4T128M-A05AU | 制造商:STEC Inc 功能描述:1GB,ECC,REG,DDR2-400,UNLEAD - Bulk |
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