mcf5307cft90b Freescale Semiconductor, Inc, mcf5307cft90b Datasheet - Page 219

• Manufacturer Part Number: mcf5307cft90b
• Description: Mcf5307 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

Internal interrupts are programmed to a level and priority. Each internal interrupt has a
unique ICR. Each of the 7 interrupt levels has 5 priorities, for a total of 35 possible priority
levels, encompassing internal and external interrupts. The four external interrupt pins offer
seven possible settings at a fixed interrupt level and priority.
The IRQPAR determines these settings for external interrupt request levels. External
interrupts can be programmed to supply an autovector or execute an external interrupt
acknowledge cycle. This is described in Section 9.2.2, “Autovector Register (AVR).”
9.2.1 Interrupt Control Registers (ICR0–ICR9)
The interrupt control registers (ICR0–ICR9) provide bits for defining the interrupt level and
priority for the interrupt source assigned to the ICR, shown in Table 9-2.
Table 9-3 describes ICR fields.
7
6–5
4–2
1–0
Bits
Address
Reset
Field
R/W
AVEC
—
IL
IP
Field
AVEC
MBAR + 0x04C (ICR0); 0x04D (ICR1); 0x04E (ICR2); 0x04F (ICR3); 0x050 (ICR4); 0x051 (ICR5);
Autovector enable. Determines whether the interrupt-acknowledge cycle input (for the internal
interrupt level indicated in IL for each interrupt) requires an autovector response.
0 Interrupting source returns vector during interrupt-acknowledge cycle.
1 SIM generates autovector during interrupt acknowledge cycle.
Reserved, should be cleared.
Interrupt level. Indicates the interrupt level assigned to each interrupt input. See Table 9-4.
Interrupt priority. Indicates the interrupt priority for internal modules within the interrupt-level
assignment. See Table 9-4.
00 Lowest
01 Low
10 High
11 Highest
7
0
Figure 9-2. Interrupt Control Registers (ICR0–ICR9)
Table 9-2. Interrupt Control Registers (Continued)
6
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MBAR Offset
For More Information On This Product,
Table 9-3. ICRn Field Descriptions
0x052 (ICR6); 0x053 (ICR7); 0x054 (ICR8); 0x055 (ICR9)
—
—
0x053
0x054
0x055
Chapter 9. Interrupt Controller
5
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Register
ICR7
ICR8
ICR9
4
DMA1
DMA2
DMA3
Description
R/W
0_00
IL
3
Name
Interrupt Controller Registers
2
1
00
IP
0
9-3