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ST7263BEx 数据表(PDF) 13 Page - STMicroelectronics

部件名 ST7263BEx
功能描述  Low speed USB 8-bit MCU family with up to 32 KB Flash/ROM, DFU capability, 8-bit ADC, WDG, timer, SCI and I²C
PDF  186 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

ST7263BEx 数据表(HTML) 13 Page - STMicroelectronics

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ST7263Bxx
Pin description
Doc ID 7516 Rev 8
13/186
2
Pin description
2.1
RESET signal (bidirectional)
It is active low and forces the initialization of the MCU. This event is the top priority non
maskable interrupt. This pin is switched low when the Watchdog is triggered or the VDD is
low. It can be used to reset external peripherals.
Note:
Adding two 100 nF decoupling capacitors on the Reset pin (respectively connected to VDD
and VSS) will significantly improve product electromagnetic susceptibility performance.
2.2
OSCIN/OSCOUT: input/output oscillator pin
These pins connect a parallel-resonant crystal, or an external source, to the on-chip
oscillator.
2.3
VDD/VSS
Main power supply and ground voltages
Note:
To enhance the reliability of operation, it is recommended that VDDA and VDD be connected
together on the application board. This also applies to VSSA and VSS.
2.4
VDDA/VSSA
Power supply and ground voltages for analog peripherals.
Note:
To enhance the reliability of operation, it is recommended that VDDA and VDD be connected
together on the application board. This also applies to VSSA and VSS.
2.5
Alternate functions
Several pins of the I/O ports assume software programmable alternate functions as shown
in the pin description.
Note:
1
The USBOE alternate function is mapped on Port C2 in 32/34/48 pin devices. In SO24
devices it is mapped on Port B1.
2
The timer OCMP1 alternate function is mapped on Port A6 in 32/34/48 pin devices. In SO24
devices it is not available.



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