Datasheet > MAX6729AKAYHD2+T

MAX6729AKAYHD2+T

更新时间： 2023-08-15 00:00:00

品牌	Logo	应用领域
美信 - MAXIM		信息通信管理光电二极管
页数	文件大小	规格书
18页	1688K
描述
Power Management Circuit, BICMOS, PDSO8

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MAX6729AKAYHD2+T 数据手册

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MAX6715A–MAX6729A/

MAX6797A

Dual/Triple, Ultra-Low-Voltage, SOT23 μP

Supervisory Circuits

magnitude indicated (reset threshold overdrive). The

graph shows the maximum pulse width that a negative-

going V

transient may typically have without causing a

START

reset pulse to be issued. As the amplitude of the transient

increases (i.e., goes farther below the reset threshold),

the maximum allowable pulse width decreases. A 0.1μF

bypass capacitor mounted close to the V

additional transient immunity.

SET WDI

HIGH

pin provides

PROGRAM

CODE

Watchdog Software Considerations

Setting and resetting the watchdog input at different points

in the program, rather than “pulsing” the watchdog input

high-low-high or low-high-low, helps the watchdog timer to

closely monitor software execution. This technique avoids

a “stuck” loop where the watchdog timer continues to be

reset within the loop, keeping the watchdog from timing

out. Figure 6 shows an example flow diagram where the

I/O driving the watchdog input is set high at the begin-

ning of the program, set low at the beginning of every

subroutine or loop, then set high again when the program

returns to the beginning. If the program should “hang”

in any subroutine, the I/O is continually set low and the

watchdog timer is allowed to time out, causing a reset or

interrupt to be issued.

SUBROUTINE OR

PROGRAM LOOP

SET WDI LOW

HANG IN

SUBROUTINE

COMPLETED

RETURN

Figure 6. Watchdog Flow Diagram

Maxim Integrated

│ 13

www.maximintegrated.com

1...10 11 121314 15 16...18

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