M68ICS08GR datasheet(289/408 Pages) FREESCALE

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System Integration Module (SIM)

Exception Control

MC68HC908GR8 — Rev 4.0

Technical Data

MOTOROLA

System Integration Module (SIM)

289

19.6.1.6 Interrupt Status Register 3

Bits 7–2 — Always read 0

I16–I15 — Interrupt Flags 16–15

These flags indicate the presence of an interrupt request from the

source shown in Table 19-3.

1 = Interrupt request present

0 = No interrupt request present

19.6.2 Reset

All reset sources always have equal and highest priority and cannot be

arbitrated.

19.6.3 Break Interrupts

The break module can stop normal program flow at a software-

programmable break point by asserting its break interrupt output. See

Timer Interface Module (TIM). The SIM puts the CPU into the break state

by forcing it to the SWI vector location. Refer to the break interrupt

subsection of each module to see how each module is affected by the

break state.

Address:

$FE06

Bit 7

654321

Bit 0

Read:

000000

I16

I15

Write:

RRRRRRRR

Reset:

00000000

R= Reserved

Figure 19-14. Interrupt Status Register 3 (INT3)

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