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- Path: gateway.icontech.com!nefb!Patrick.O'toole
- Distribution: world
- Newsgroups: comp.sys.m68k
- From: Patrick.O'toole@nefb.icontech.com (Patrick O'Toole)
- X-Mailer: NetXpress 1.53
- Date: Tue, 09 Jan 1996 15:30:52 -0500
- Organization: The Northeast File Bank
- Subject: reset watchdog
- Message-ID: <2e7.50.155@nefb.icontech.com>
-
- hi all.
- I was trying to make a simple reset circuit.
- It needs to pull reset LO on power up for 100ms.
- stay high- as long as a pulse com,es in each second...or else go lo.
-
- I've seen watchdog chips from maxim...but they want $5...hell that's 300%
- more than the damn CPU!! I was thinking of using a 555 timer to procduce
- the wave (100ms) and retriggable...as long as you keep retr...you keep
- the reset/ihbit line on the 555 lo...
-
- does anyone have an easier way?!
-
- * Evaluation copy of Silver Xpress. Day # 430
- --- via Silver Xpress V4.01 [NR]
-