MC9S12HZ256 Datasheet, PDF (55/692 Pages) Freescale Semiconductor, Inc – HCS12 Microcontrollers

Chapter 1 MC9S12HZ256 Device Overview
1.10.2 Resets
Resets are a subset of the interrupts featured in Table 1-12. The different sources capable of generating a
system reset are summarized in Table 1-12.
Reset
Power-on Reset
External Reset
Low Voltage Reset
Clock Monitor Reset
COP Watchdog Reset
Table 1-12. Reset Summary
Priority
1
1
1
2
3
Source
CRG Module
RESET pin
VREG Module
CRG Module
CRG Module
Vector
0xFFFE, 0xFFFF
0xFFFE, 0xFFFF
0xFFFE, 0xFFFF
0xFFFC, 0xFFFD
0xFFFA, 0xFFFB
1.10.3 Effects of Reset
When a reset occurs, MCU registers and control bits are changed to known start-up states. Refer to the
respective module block description chapters for register reset states. MC mode dependent pin
configuration of port A, B and E out of reset.
Refer to the PIM block description chapter for reset configurations of all peripheral module ports.
Refer to Table 1-1 for locations of the memories depending on the operating mode after reset.
The RAM array is not automatically initialized out of reset.
MC9S12HZ256 Data Sheet, Rev. 2.04
Freescale Semiconductor
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