STM6321 datasheet(12/31 Pages) STMICROELECTRONICS

部件名	STM6321

功能描述	5-pin supervisor with watchdog timer and push-button reset

PDF	31 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

12 / 31 page

Operation

STM632x, STM682x

12/31

DocID11110 Rev 13

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)

1. 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

STM6321 数据表(PDF) 12 Page - STMicroelectronics