STM6823 datasheet(12/29 Pages) STMICROELECTRONICS

tên linh kiện	STM6823

Giải thích chi tiết về linh kiện	5-pin supervisor with watchdog timer and push-button reset

PDF	29 Pages

Scroll/Zoom	100%

nhà sản xuất	STMICROELECTRONICS [STMicroelectronics]

Trang chủ	http://www.st.com

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12 / 29 page

Operation

STM6321/6322STM6821/6822/6823/6824/6825

12/29

Figure 12.

Ensuring RST valid to VCC = 0, (active-low push-pull outputs)

Figure 13.

Ensuring RST valid to VCC = 0, (active-high, push-pull outputs)

This configuration does not work on open drain outputs of the STM6321/6322/6822.

2.6

Interfacing to microprocessors with bidirectional reset pins

Microprocessors with bidirectional reset pins can contend with the STM6321 / 6322 / 6821 /

6822 / 6823 / 6824 / 6825 reset output. For example, if the reset output is driven high and the

microprocessor wants to pull it low, signal contention will result. To prevent this from

occurring, connect a 4.7 k

Ω resistor between the reset output and the microprocessor’s

reset I/O as in Figure 14.

Figure 14.

Interfacing to microprocessors with bidirectional reset I/O

AI09138

STM6XXX

RST

GND

VCC

AI09139

STM6XXX

RST

GND

VCC

AI09135

STM6XXX

RST

GND

4.7k

VCC

Microprocessor

RST

Buffered Reset to other

System Components

GND

VCC

STM6823 bảng dữ liệu(PDF) 12 Page - STMicroelectronics