S912XEG384J3VA Datasheet, PDF (268/1324 Pages) Freescale Semiconductor, Inc – MC9S12XEP100 Reference Manual Covers MC9S12XE Family

Chapter 6 Interrupt (S12XINTV2)
6.3.2.3
Priority
low
high
Table 6-6. XGATE Interrupt Priority Levels
XILVL2
0
0
0
0
1
1
1
1
XILVL1
0
0
1
1
0
0
1
1
XILVL0
0
1
0
1
0
1
0
1
Meaning
Interrupt request is disabled
Priority level 1
Priority level 2
Priority level 3
Priority level 4
Priority level 5
Priority level 6
Priority level 7
Interrupt Request Configuration Address Register (INT_CFADDR)
Address: 0x0127
7
6
5
4
3
2
1
0
R
INT_CFADDR[7:4]
W
0
0
0
0
Reset
0
0
0
1
0
0
0
0
= Unimplemented or Reserved
Figure 6-5. Interrupt Configuration Address Register (INT_CFADDR)
Read: Anytime
Write: Anytime
Table 6-7. INT_CFADDR Field Descriptions
Field
Description
7–4
Interrupt Request Configuration Data Register Select Bits — These bits determine which of the 128
INT_CFADDR[7:4] configuration data registers are accessible in the 8 register window at INT_CFDATA0–7. The hexadecimal
value written to this register corresponds to the upper nibble of the lower byte of the address of the interrupt
vector, i.e., writing 0xE0 to this register selects the configuration data register block for the 8 interrupt vector
requests starting with vector at address (vector base + 0x00E0) to be accessible as INT_CFDATA0–7.
Note: Writing all 0s selects non-existing configuration registers. In this case write accesses to
INT_CFDATA0–7 will be ignored and read accesses will return all 0.
6.3.2.4 Interrupt Request Configuration Data Registers (INT_CFDATA0–7)
The eight register window visible at addresses INT_CFDATA0–7 contains the configuration data for the
block of eight interrupt requests (out of 128) selected by the interrupt configuration address register
(INT_CFADDR) in ascending order. INT_CFDATA0 represents the interrupt configuration data register
of the vector with the lowest address in this block, while INT_CFDATA7 represents the interrupt
configuration data register of the vector with the highest address, respectively.
MC9S12XE-Family Reference Manual Rev. 1.25
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Freescale Semiconductor