u5020m ATMEL Corporation, u5020m Datasheet
u5020m
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u5020m Summary of contents
Page 1
... Enable Output 1. Description The digital window watchdog timer, U5020M CMOS integrated circuit. In applica- tions where safety is critical especially important to monitor the microcontroller. Normal microcontroller operation is indicated by a cyclically transmitted trigger signal, which is received by a window watchdog timer within a defined time window. ...
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... Figure 1-1. Block Diagram with External Ciruit OSC C 1 Reset 10 Input Micro- controller Trigger Mode 12 3-8 Wake up 2. Pin Configuration Figure 2-1. Pinning SO16 U5020M Oscillator OSC 11 Input signal conditioning Power-on POR reset 14 GND WAKE-UP ...
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... TS Programming pin to select different time durations for the long watchdog time. 4. Functional Description 4.1 Supply, Pin 13 The U5020M requires a stabilized supply voltage V characteristics. An external buffer capacitor may be connected between pin 13 and GND. 4.2 RC Oscillator, Pin 15 The clock frequency, f, can be adjusted by the components R ...
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... When the power-up reset time has elapsed, the watchdog has to be switched to monitoring mode by the microcontroller by a “low” signal transmitted to the mode pin (pin 12) within the time-out period, t erates a reset pulse, t synchronized with the switchover mode time, t U5020M 4 = 500 ...
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... The positive edge of the trigger signal , (enable time). The 3 2 Pin 13 Pin Pin 12 Pin ensure correct operation of the micro and an enable time which a trigger sig U5020M 5 ...
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... The watchdog can be switched back from the long to the short watchdog mode with a low poten- tial at the mode pin (pin 12). Figure 4-5. Pulse Diagram of the Long Watchdog Time Reset out Wake-up Mode Trigger Enable U5020M shows the switch-over from the short to the long watchdog mode. The wake-up signal ...
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... Output current Input voltage Ambient temperature range Storage temperature range 7. Thermal Resistance Parameters Junction ambient SO16 4755B–AUTO–11/05 Symbol Value V 6 ±2 OUT V -0 -40 to +85 amb T -55 to +150 stg Symbol Value R 160 thJA U5020M Unit 0 Unit K/W 7 ...
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... Short disable time Short enable time Long disable time Input switch = low (0) Long enable time Input switch = low (0) Long disable time Input switch = high (1) Long enable time Input switch = high (1) Reset-out time U5020M 8 Pin 11, 12, 16 ...
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... Revision No. 4755B-AUTO-11/05 4755B–AUTO–11/05 Package SO16 SO16 10.0 9.85 0.4 1.27 8. History Put datasheet in a new template First page: Pb-free logo added Page 9: Ordering Information changed Remarks Tubed, Pb-free Taped and reelded, Pb-free 5.2 4.8 3.7 1.4 0.2 0.25 3.8 0.10 6.15 5.85 technical drawings according to DIN specifications U5020M 9 ...
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... Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life. © Atmel Corporation 2005. All rights reserved. Atmel marks or trademarks of Atmel Corporation or its subsidiaries. Other terms and product names may be trademarks of others. Atmel Operations Memory ...