PXS20RM Datasheet, PDF (62/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Introduction
1.4.37 Redundancy Control and Checker Unit (RCCU)
The RCCU checks all outputs of the sphere of replication (addresses, data, control signals). It has the
following features:
• Duplicated module to guarantee highest possible diagnostic coverage (check of checker)
• Multiple times replicated IPs are used as checkers on the SoR outputs
1.4.38 Voltage Regulator / Power Management Unit (PMU)
The on-chip voltage regulator module provides the following features:
• Single external rail required
• Single high supply required: nominal 3.3 V for packaged option
— Packaged option requires external ballast transistor due to reduced dissipation capacity at high
temperature but can use embedded transistor if power dissipation is maintained within package
dissipation capacity (lower frequency of operation)
• All I/Os are at same voltage as external supply (3.3 V nominal)
• Duplicated Low-Voltage Detectors (LVD) to guarantee proper operation at all stages (reset,
configuration, normal operation) and, to maximize safety coverage, one LVD can be tested while
the other operates (on-line self-testing feature)
1.4.39 Built-In Self-Test (BIST) Capability
This device includes the following protection against latent faults:
• Boot-time Memory Built-In Self-Test (MBIST)
• Boot-time scan-based Logic Built-In Self-Test (LBIST)
• Run-time ADC Built-In Self-Test (BIST)
• Run-time Built-In Self Test of LVDs
1.4.40 IEEE 1149.1 JTAG Controller (JTAGC)
The JTAGC block provides the means to test chip functionality and connectivity while remaining
transparent to system logic when not in test mode. All data input to and output from the JTAGC block is
communicated in serial format. The JTAGC block is compliant with the IEEE standard.
The JTAG controller provides the following features:
• IEEE Test Access Port (TAP) interface with 5 pins:
— TDI
— TMS
— TCK
— TDO
— JCOMP
• Selectable modes of operation include JTAGC/debug or normal system operation
1-22
PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor