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System device identification (SDID)
9.2 System device identification (SDID)
This device is hard coded to the value 0x45 in the SIM_SDID registers.
9.3 Universally unique identification (UUID)
This device contains up to 64-bit UUID to identify each device in this family. The intent
of UUID is to enable distributed systems to uniquely identify information without
significant central coordination.
9.4 Reset and system initialization
Resetting the MCU provides a way to start processing from a set of known initial
conditions. During reset, most control and status registers are forced to initial values and
the program counter is loaded from the reset vector (0xFFFE:0xFFFF). On-chip
peripheral modules are disabled and I/O pins are initially configured as default functions
on ALT0. The
CCR
a chance to initialize the stack pointer (SP) and system control settings. SP is forced to
0x00FF at reset.
This device has the following sources for reset:
• Power-on reset (POR)
• Low-voltage detect (LVD)
• Windowed COP (COP) timer
• Illegal opcode detect (ILOP)
• Illegal address detect (ILAD)
• Background debug forced reset
• External reset pin (RESET)
• Loss of clock reset (LOC)
• Flash illegal access detect (FILA)
Each of these sources, with the exception of the background debug forced reset, has an
associated bit in the system reset status (SRS) register.
98
[I] bit is set to block maskable interrupts so that the user program has
MC9S08SU16 Reference Manual, Rev. 5, 4/2017
NXP Semiconductors
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