mc68hc908rf2 Freescale Semiconductor, Inc, mc68hc908rf2 Datasheet - Page 93
mc68hc908rf2
Manufacturer Part Number
mc68hc908rf2
Description
M68hc08 Microcontrollers Microcontroller / Transmitter
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908RF2.pdf
(188 pages)
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Data Sheet — MC68HC908RF2
7.1 Introduction
7.2 Features
7.3 Functional Description
7.3.1 External Interrupt
MC68HC908RF2 — Rev. 4.0
MOTOROLA
This section describes the maskable external interrupt (IRQ) input and six
independently maskable keyboard wakeup interrupt pins.
Features of the KBI include:
This section provides a functional description of the keyboard/external interrupt
module (KBI).
A logic 0 applied to the external interrupt pin (IRQ) can latch a CPU interrupt
request.
module.
A logic 0 applied to one or more of the keyboard interrupt pins can latch a CPU
interrupt request.
KBI module
See
registers.
•
•
•
•
•
•
Figure 7-3
Dedicated external interrupt pin (IRQ)
Six keyboard interrupt pins with separate keyboard interrupt enable bits and
one keyboard interrupt mask
Internal pullup resistor
Hysteresis buffer
Programmable edge-only or edge- and level-interrupt sensitivity
Automatic interrupt acknowledge
Freescale Semiconductor, Inc.
Figure 7-2
For More Information On This Product,
Section 7. Keyboard/External Interrupt Module (KBI)
Keyboard/External Interrupt Module (KBI)
for a summary of the interrupt and keyboard input/output (I/O)
Go to: www.freescale.com
Figure 7-5
shows the structure of the external (IRQ) interrupt of the KBI
shows the structure of the keyboard interrupts of the
Data Sheet
93
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