Datasheet

Resets and Interrupts
Register Descriptions
MC9S12DP256 — Revision 1.1
Resets and Interrupts
WRTINT — Write to the Interrupt Test Registers
Read anytime; Write only in special modes and with I-mask and
X-mask set.
1 = Disconnect the interrupt inputs from the priority decoder and
use the values written into the ITEST registers instead.
0 = Disables writes to the test registers; reads of the test registers
will return the state of the interrupt
NOTE: Any interrupts which are pending at the time that WRTINT is set will
remain until they are overwritten.
ADR3 – ADR0 — Test register select bits
Write anytime, read anytime
These bits determine which test register is selected on a read or write.
The hexadecimal value written here will be the same as the upper
nibble of the lower byte of the vectors selects. That is, an “F” written
into ADR3 – ADR0 will select vectors $FFFE – $FFF0 while a “7”
written to ADR3 – ADR0 will select vectors $FF7E – $FF70.
ITCR — Interrupt Test Control Register
Address Offset: $0015
Bit 7 654321Bit 0
0 0 0 WRTINT ADR3 ADR2 ADR1 ADR0
Reset:
00001111
Freescale Semiconductor, I
Freescale Semiconductor, Inc.
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