Motorola MC9S12GC-Family warranty HCS12 Core Block Description, Device-specific information, Ppage

Device User Guide — 9S12C128DGV1/D V01.05

changed to known start-up states. Refer to the respective module Block User Guides for register reset states.

5.3.1 Reset Summary Table

Table 5-2 Reset Summary

Reset	Priority	Source	Vector
Power-on Reset	1	CRG Module	$FFFE, $FFFF
External Reset	1	RESET pin	$FFFE, $FFFF
Low Voltage Reset	1	VREG Module	$FFFE, $FFFF
Clock Monitor Reset	2	CRG Module	$FFFC, $FFFD
COP Watchdog Reset	3	CRG Module	$FFFA, $FFFB

5.3.2 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 User Guides for register reset states. Refer to the HCS12 Multiplexed External Bus Interface (MEBI) Block Guide for mode dependent pin configuration of port A, B and E out of reset.

Refer to the PIM Block User Guide for reset configurations of all peripheral module ports.

Refer to Figure 1-2to Figure 1-5footnotes for locations of the memories depending on the operating mode after reset.

The RAM array is not automatically initialized out of reset.

NOTE: For devices assembled in 48-pin or 52-pin LQFP packages all non-bonded out pins should be configured as outputs after reset in order to avoid current drawn from floating inputs. Refer to Table 2-1for affected pins.

Section 6 HCS12 Core Block Description

Consult the individual block guides for information about the HCS12 core modules, i.e. central processing unit (CPU), interrupt module (INT), module mapping control module (MMC), multiplexed external bus interface (MEBI), debug12 module (DBG12) and background debug mode module (BDM).

Where the CPU12 Reference Manual refers to cycles this is equivalent to device bus clock periods.

6.1 Device-specific information

6.1.1 PPAGE

External paging is not supported on these devices. In order to access the 16K flash blocks in the address range $8000-$BFFF the PPAGE register must be loaded with the corresponding value for this range. Refer to Table 6-1for device specific page mapping.

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