PXD20 Datasheet, PDF (22/130 Pages) Freescale Semiconductor, Inc – PXD20 Microcontroller

Overview
1.4.32 Stepper stall detect (SSD) module
The SSD module provides a circuit to measure and integrate the induced voltage on the non-driven coil of a stepper motor using
full steps when the gauge pointer is returning to zero (RTZ).
The SSD module features the following:
• Programmable full step state
• Programmable integration polarity
• Blanking (recirculation) state
• 16-bit integration accumulator register
• 16-bit modulus down counter with interrupt
1.4.33 Sound generator module (SGM)
The SGM features the following:
• 4-channel audio mixer
• Each channel capable of independent Tone generation or Wave playback
• Individual channel volume control (8-bit resolution)
• Tone Mode:
— Programmable Tone frequency
— Programmable amplitude envelope: attack, duration and decay
— Programmable number of tone pulses and inter-tone duration
• Wave Mode:
— One FIFO per channel working in conjunction with eDMA
— Supports standard audio sampling rates (4 kHz, 8 kHz, 11.025 kHz, 16 kHz, 22.050 kHz, 32 kHz, 44.100 kHz,
48 kHz)
— Same sample rate applies to all channels
— 8-bit, 12-bit, 16-bit input data formats
— Programmable wave duration and inter-wave duration
— Repeat mode with programmable number of wave playbacks
• SGM Output:
— 16-bit PWM channel
— Integrated I²S master interface for connection to external audio DAC
1.4.34 IEEE 1149.1 JTAG controller (JTAGC)
JTAGC features the following:
• Backward compatible to standard JTAG IEEE 1149.1-2001 test access port (TAP) interface
• Support for boundary scan testing
1.4.35 Nexus Development Interface (NDI)
The Nexus 3 module is compliant with Class 3 of the IEEE-ISTO 5001-2008 standard, with additional Class 4 features
available. The following features are implemented:
• Program Trace via Branch Trace Messaging (BTM). Branch trace messaging displays program flow discontinuities
(direct and indirect branches, exceptions, etc.), allowing the development tool to interpolate what transpires between
the discontinuities. Thus static code may be traced.
PXD20 Microcontroller Data Sheet, Rev. 2
22
Preliminary—Subject to Change Without Notice
Freescale Semiconductor