AN2556 datasheet(5/35 Pages) STMICROELECTRONICS

5 / 35 page

AN2556

Modified features

5/35

Modified features

1.1

Pinout

1.1.1

Pinout modification summary

Table 1 below summarizes the modifications made in the pinout.

1.1.2

Pin 17

In the ST10F269Zx, a decoupling capacitor of 330nF minimum has to be connected

between pin 17 (named DC2) and the nearest VSS pin.

This is no longer the case in the ST10F273Z4 device where pin 17 is a VDD pin.

Hardware impacts

PCB must be adapted.

Software impacts

None.

Table 1.

Pinout modifications table

No.

ST10F269Zx

ST10F273Z4

Name

Function

Name

Function

DC2

Internal voltage regulator decoupling.

Connect to nearest VSS via a 330nF

capacitor.

VDD

5V power supply pin

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.

Selects code execution out of internal

Flash or external memory according

to level during reset

EA-VSTBY

Selects code execution out of internal

Flash or external memory according to

level during reset. Power supply input for

standby mode.

143

VSS

Ground pin

XTAL3

Input to the 32 kHz oscillator amplifier

circuit. If not used should be tied to

ground to avoid consumption. In addition,

bit OFF32 in RTCCON register should be

set.

144

VDD

5V power supply pin

XTAL4

Output of the 32 kHz oscillator amplifier

circuit. If not used should be left open to

avoid spurious consumption.

AN2556 数据表(PDF) 5 Page - STMicroelectronics

AN2556 数据表(HTML) 5 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

数据表下载

链接网址

AN2556 数据表(PDF) 5 Page - STMicroelectronics

AN2556 数据表(HTML) 5 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35

数据表 下载

链接网址

数据表下载