Chapter 21 Interrupt (S12MC9S12XDP512V1)
MC9S12XDP512 Data Sheet, Rev. 2.11
Freescale Semiconductor PRELIMINARY 851
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21.3.1.3 Interrupt Request Configuration Address Register (INT_CFADDR)
Read: Anytime
Write: Anytime
Address: 0x0127
76543210
RINT_CFADDR[7:4] 0000
W
Reset 00010000
= Unimplemented or Reserved

Figure 21-5. Interrupt Configuration Address Register (INT_CFADDR)

Table 21-5. INT_CFADDR Field Descriptions

Field Description
7–4
INT_CFADDR[7:4]
Interrupt Request Configuration Data Register Select Bits — These bits determine which of the 128
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 interrupt vector, i.e.,
writing 0xE0 to this register selects the configuration data register block for the 8 interrupt vector requests
starting with vector (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.