Method and apparatus for generating a pin interrupt request in a

Details Method and apparatus for generating a pin interrupt request in a Method and apparatus for generating a pin interrupt request in a

1994-05-24

1995-05-30

Lall, Parshotam S.

Boots, shoes, and leggings

3642731, 3649488, 364941, 3649411, 364947, 3649472, 371 24, G06F 702

Patent

active

054210275

ABSTRACT:
A pin generated interrupt system in a digital data processor is capable of generating interrupt requests in order to awaken the digital data processor from a reduced state of activity and power consumption called stop mode. The user can permanently disable the pin generated interrupt system using a mask option chosen during the manufacturing process. A register bit that determines whether the pin is an input or an output is also used to enable compare circuitry that determines whether an external device is requesting an interrupt. When a plurality of pins are used, it is only necessary for an interrupt to be requested on one of the pins in order for an interrupt request signal to be generated.

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National Semiconductor Microcontroller Data Book, 1988 Edition, pp. 2-132 and 2-133 (partial).
Microcontroller Databook; National Semiconductor; Multi-Input Wakeup 1988 pp. 2-132.

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