PXR40RM Datasheet, PDF (279/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Chapter 8
System Information Module
8.1 SIM Overview
The System Information Module (SIM) contains the calibration constants for the on-chip Temperature
Sensor and a 128-bit Device ID constant that is unique to every chip. All values are read-only, and may
not be changed by software.
Two 32-bit locations are reserved for temperature sensor calibration constants. A description of their usage
is provided in the Temperature Sensor Chapter. The Unique Device ID is encoded and stored in four
adjacent memory locations. There is no specific user information provided in the Device ID. Table 8-1
shows the organization of the constants.
8.1.1 SIM Constants
Offset from
0xFFFE_C000
0x00
0x04
0x08
0x0C
0x10
0x14
0x18
0x1C
0x20
0x24
0x28
0x2C
0x30
0x34
0x38
0x3C
Table 8-1. SIM Constants
0:15
16:31
Temperature sensor calibration constant
Temperature sensor calibration constant
Reserved
Unique Device ID
Unique Device ID
Unique Device ID
Unique Device ID
Reserved
PXR40 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor
8-1