sc9s08mz16 Freescale Semiconductor, Inc, sc9s08mz16 Datasheet - Page 31

• Manufacturer Part Number: sc9s08mz16
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 3
Modes of Operation
3.1
The operating modes of the SC9S08MZ16 are described in this chapter. Entry into each mode, exit from
each mode, and functionality while in each of the modes are described.
3.2
3.3
This is the normal operating mode for the SC9S08MZ16. This mode is selected when the BKGD/MS pin
is high at the rising-edge of reset. After a reset occurs in this mode, the CPU executes code fetched from
internal memory beginning at 0xFFFE:0xFFFF.
3.4
The active background mode functions are managed through the background debug controller (BDC) in
the HCS08 core. The BDC, together with the on-chip debug module (DBG), provide the means for
analyzing MCU operation during software development.
Active background mode is entered in any of five ways:
Freescale Semiconductor
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Run mode
Active background mode for code development
Stop modes:
— System clocks stopped; voltage regulator in standby
— Stop2 — Partial power down of internal circuits, RAM contents retained
— Stop3 — All internal circuits powered for fast recovery
When the BKGD/MS pin is low at the rising edge of reset
When a BACKGROUND command is received through the BKGD pin
When a BGND instruction is executed
When encountering a BDC breakpoint
Introduction
Features
Run Mode
Active Background Mode
SC9S08MZ16 does not support wait mode. In
Processor Unit
this device.
(S08CPUV2),” all wait mode description is not available in
SC9S08MZ16 MCU Data Sheet, Rev. 0 Draft C
NOTE
Chapter 7, “Central
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