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AN2021 数据表(PDF) 7 Page - STMicroelectronics

部件名 AN2021
功能描述  The ST10F272B and ST10F272E are members of the STMicroelectronics
PDF  39 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

AN2021 数据表(HTML) 7 Page - STMicroelectronics

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AN2021
Modified features
7/39
1
Modified features
1.1
Pinout
1.1.1
Pinout modification summary
Table 1 summarizes the modifications made to the pinout.
1.1.2
Pin 17
On the ST10F269, a decoupling capacitor of 330nF minimum has to be connected between
the pin 17 (named DC2) and the nearest VSS pin.
This is no longer the case for the ST10F272 device where pin 17 is a VDD pin.
Hardware impact
PCB must be adapted.
Software impact
None.
Table 1.
Pinout modifications
Pin
number
ST10F269
ST10F272
Name
Function
Name
Function
17
DC2
Internal voltage regulator decoupling.
Connect to nearest VSS via a 330nF
capacitor.
VDD
5V power supply pin
56
DC1
Internal voltage regulator decoupling.
Connect to nearest VSS via a 330nF
capacitor.
V18
Internal voltage regulator decoupling.
Connect to nearest VSS via a
10 - 100nF capacitor.
99
EA
Selects code execution out of internal
Flash memory or external memory
according to level during reset.
EA-VSTBY
Selects code execution out of internal
Flash memory or external memory
according to level during reset. Power
supply input for the standby mode.
143
VSS
Ground pin
XTAL3
Input to the 32 kHz oscillator amplifier
circuit. When not used, must be tied to
ground to avoid consumption.
Additionally, bit OFF32 in RTCCON
register must be set.
144
VDD
5V power supply pin
XTAL4
Output of the 32 kHz oscillator
amplifier circuit. When not used, must
be left open to avoid spurious
consumption.



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