Intel 8XC196MC, 8XC196MD, 8XC196MH manual Minimum Reset Circuit

Models: 8XC196MD 8XC196MH 8XC196MC

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MINIMUM HARDWARE CONSIDERATIONS

+

4.7μF

RESET#

MCS®96

Microcontroller

A0276-02

Figure 13-10. Minimum Reset Circuit

Other devices in the system may not be reset because the capacitor will keep the voltage above VIL. Since RESET# is asserted for only 16 state times, it may be necessary to lengthen and buffer the system-reset pulse. Figure 13-11 shows an example of a system-reset circuit. In this example, D2 creates a wired-OR gate connection to the reset pin. An internal reset, system power-up, or SW1 closing will generate the system-reset signal.

 

VCC

 

(1)

 

VCC

 

(2)

D1

R

D2

 

 

4.7 kΩ

RESET#

SW1C

Notes:

Schmitt Triggers

System reset signal to external circuitry

MCS®96

Microcontroller

1.D1 provides a faster cycle time for repetitive power-on resets.

2.Optional pull-up for faster recovery.

A0277-03

Figure 13-11. Example of a System Reset Circuit

13-11

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Intel 8XC196MC, 8XC196MD, 8XC196MH manual Minimum Reset Circuit