MC68HC908JL8 MOTOROLA [Motorola, Inc], MC68HC908JL8 Datasheet - Page 239

• Manufacturer Part Number: MC68HC908JL8
• Description: Motorola reserves the right to make changes without further notice to any products herein
• Manufacturer: MOTOROLA [Motorola, Inc]

14.5 IRQ Module During Break Interrupts
14.6 IRQ Status and Control Register (INTSCR)
MC68HC908JL8
MOTOROLA
—
Rev. 2.0
Address:
The system integration module (SIM) controls whether the IRQ latch can
be cleared during the break state. The BCFE bit in the break flag control
register (BFCR) enables software to clear the latches during the break
state. (See
To allow software to clear the IRQ latch during a break interrupt, write a
logic one to the BCFE bit. If a latch is cleared during the break state, it
remains cleared when the MCU exits the break state.
To protect the latches during the break state, write a logic zero to the
BCFE bit. With BCFE at logic zero (its default state), writing to the ACK
bit in the IRQ status and control register during the break state has no
effect on the IRQ latch.
The IRQ status and control register (INTSCR) controls and monitors
operation of the IRQ module. The INTSCR has the following functions:
Reset:
Read:
Write:
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Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 14-3. IRQ Status and Control Register (INTSCR)
Shows the state of the IRQ flag
Clears the IRQ latch
Masks IRQ and interrupt request
Controls triggering sensitivity of the IRQ interrupt pin
$001D
Bit 7
0
0
Section 7. System Integration Module
Go to: www.freescale.com
External Interrupt (IRQ)
= Unimplemented
6
0
0
5
0
0
4
0
0
IRQF
IRQ Module During Break Interrupts
3
0
ACK
2
0
External Interrupt (IRQ)
(SIM).)
IMASK
1
0
Technical Data
MODE
Bit 0
0
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