PXD20RM Datasheet, PDF (749/1628 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

Chapter 19
Error Correction Status Module (ECSM)
19.1 Introduction
The Error Correction Status Module (ECSM) provides a myriad of miscellaneous control functions for the
device including program-visible information about configuration, a reset status register, and optional
features such as information on memory errors reported by error-correcting codes. Its Supervisor-mode
access protection feature provides access protection for slave modules INTC, ECSM, MPU, PRAM2P,
STM, and SWT.
19.2 Overview
The Error Correction Status Module is mapped into the IPS space and supports a number of miscellaneous
control functions for the device.
19.3 Features
The ECSM includes these features:
• Program-visible information on the device configuration and revision
• Optional registers for capturing information on memory errors if error-correcting codes (ECC) are
implemented
• Optional registers to specify the generation of single- and double-bit memory data inversions for
test purposes if error-correcting codes are implemented
• Spp_ips_reg_protection provides privileged-only access to selected on-platform slave devices:
INTC, ECSM, MPU, STM, and SWT.
19.4 Memory map and register description
19.4.1 Memory map
Table 19-1 provides the register map of the ECSM.
Table 19-1. ECSM memory map
Address offset
Register
0x00–0x20
0x24
0x28–0x42
0x43
0x44–0x46
0x47
Reserved
Miscellaneous User-Defined Control Register (MUDCR)
Reserved
ECC Configuration Register (ECR)
Reserved
ECC Status Register (ESR)
Location
on page 19-2
on page 19-4
on page 19-5
Freescale Semiconductor
PXD20 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
19-1