Figure 5.Power supplies constraints (–0.3 V V
Figure 6.Independent ADC supply (–0.3 V V
Figure 7.Power supplies constraints (3.0 V V
Figure 8.Independent ADC supply (3.0 V V
This document provides electrical specifications, pin assignments, and package diagrams
for the SPC560P44/50 series of microcontroller units (MCUs). It also describes the device
features and highlights important electrical and physical characteristics. For functional
characteristics, refer to the device reference manual.
1.2 Description
This 32-bit system-on-chip (SoC) automotive microcontroller family is the latest
achievement in integrated automotive application controllers. It belongs to an expanding
range of automotive-focused products designed to address chassis applications—
specifically, electrical hydraulic power steering (EHPS) and electric power steering (EPS)—
as well as airbag applications.
This family is one of a series of next-generation integrated automotive microcontrollers
based on the Power Architecture technology.
The advanced and cost-efficient host processor core of this automotive controller family
complies with the Power Architecture embedded category. It operates at speeds of up to
64 MHz and offers high performance processing optimized for low power consumption. It
capitalizes on the available development infrastructure of current Power Architecture
devices and is supported with software drivers, operating systems and configuration code to
assist with users implementations.
1.3 Device comparison
Ta bl e 2 provides a summary of different members of the SPC560P44Lx, SPC560P50Lx
family and their features—relative to full-featured version—to enable a comparison among
the family members and an understanding of the range of functionality offered within this
family.
3.3 V or 5 V single supply with external transistor
Analog power supply3.3 V or 5 V
Supply
Internal RC oscillator16 MHz
External crystal oscillator4–40 MHz
Packages
LQFP100
LQFP144
TemperatureStandard ambient temperature–40 to 125 °C
1. 32 message buffers, selectable single or dual channel support
2. Each FlexCAN module has 32 message buffers.
3. One FlexCAN module can act as a Safety Port with a bit rate as high as 7.5 Mbit/s.
4. Four channels shared between the two ADCs
5. The different supply voltages vary according to the part number ordered.
SPC560P44Lx, SPC560P50Lx is available in two configurations having different features:
full-featured and airbag. Ta bl e 3 shows the main differences between the two versions.
Provides a myriad of miscellaneous control functions for the device including
Error correction status module
(ECSM)
program-visible information about configuration and revision levels, a reset
status register, wakeup control for exiting sleep modes, and optional features
such as information on memory errors reported by error-correcting codes
External oscillator (XOSC)
Provides an output clock used as input reference for FMPLL_0 or as reference
clock for specific modules depending on system needs
Fault collection unit (FCU)Provides functional safety to the device
Flash memoryProvides non-volatile storage for program code, constants and variables
Frequency-modulated phaselocked loop (FMPLL)
Generates high-speed system clocks and supports programmable frequency
modulation
Interrupt controller (INTC)Provides priority-based preemptive scheduling of interrupt requests
JTAG controller
LINFlex controller
Provides the means to test chip functionality and connectivity while remaining
transparent to system logic when not in test mode
Manages a high number of LIN (Local Interconnect Network protocol)
messages efficiently with minimum load on CPU
Provides a mechanism for controlling the device operational mode and mode
Mode entry module (MC_ME)
transition sequences in all functional states; also manages the power control
unit, reset generation module and clock generation module, and holds the
configuration, control and status registers accessible for applications
Periodic interrupt timer (PIT)Produces periodic interrupts and triggers
Peripheral bridge (PBRIDGE)Interface between the system bus and on-chip peripherals
Power control unit (MC_PCU)
Reduces the overall power consumption by disconnecting parts of the device
from the power supply via a power switching device; device components are
grouped into sections called “power domains” which are controlled by the PCU
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Table 4.SPC560P44Lx, SPC560P50Lx series block summary (continued)
BlockFunction
Pulse width modulator
(FlexPWM)
Reset generation module
(MC_RGM)
Static random-access memory
(SRAM)
Contains four PWM submodules, each of which is capable of controlling a
single half-bridge power stage and two fault input channels
Centralizes reset sources and manages the device reset sequence of the
device
Provides storage for program code, constants, and variables
Provides control over all the electrical pad controls and up 32 ports with 16 bits
System integration unit lite (SIUL)
of bidirectional, general-purpose input and output signals and supports up to 32
external interrupts with trigger event configuration
System status and configuration
module (SSCM)
System timer module (STM)
Provides system configuration and status data (such as memory size and
status, device mode and security status), device identification data, debug
status port enable and selection, and bus and peripheral abort enable/disable
Provides a set of output compare events to support AUTOSAR
system tasks
System watchdog timer (SWT)Provides protection from runaway code
Supports up to 18 external sources that can generate interrupts or wakeup
Wakeup unit (WKPU)
events, 1 of which can cause non-maskable interrupt requests or wakeup
events
1. AUTOSAR: AUTomotive Open System ARchitecture (see www.autosar.org)
(1)
and operating
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1.5 Feature details
1.5.1 High performance e200z0 core processor
The e200z0 Power Architecture core provides the following features:
●High performance e200z0 core processor for managing peripherals and interrupts
●Single issue 4-stage pipeline in-order execution 32-bit Power Architecture CPU
●Harvard architecture
●Variable length encoding (VLE), allowing mixed 16-bit and 32-bit instructions
–Results in smaller code size footprint
–Minimizes impact on performance
●Branch processing acceleration using lookahead instruction buffer
●Load/store unit
–1 cycle load latency
–Misaligned access support
–No load-to-use pipeline bubbles
●Thirty-two 32-bit general purpose registers (GPRs)
●Separate instruction bus and load/store bus Harvard architecture
●Hardware vectored interrupt support
●Reservation instructions for implementing read-modify-write constructs
●Long cycle time instructions, except for guarded loads, do not increase interrupt
latency
●Extensive system development support through Nexus debug port
●Non-maskable interrupt support
1.5.2 Crossbar switch (XBAR)
The XBAR multi-port crossbar switch supports simultaneous connections between four
master ports and three slave ports. The crossbar supports a 32-bit address bus width and a
32-bit data bus width.
The crossbar allows for two concurrent transactions to occur from any master port to any
slave port; but one of those transfers must be an instruction fetch from internal flash
memory. If a slave port is simultaneously requested by more than one master port,
arbitration logic will select the higher priority master and grant it ownership of the slave port.
All other masters requesting that slave port will be stalled until the higher priority master
completes its transactions. Requesting masters will be treated with equal priority and will be
granted access to a slave port in round-robin fashion, based upon the ID of the last master
to be granted access.
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The crossbar provides the following features:
●4 master ports:
–e200z0 core complex Instruction port
–e200z0 core complex Load/Store Data port
–eDMA
–FlexRay
●3 slave ports:
–Flash memory (code flash and data flash)
–SRAM
–Peripheral bridge
●32-bit internal address, 32-bit internal data paths
●Fixed Priority Arbitration based on Port Master
●Temporary dynamic priority elevation of masters
1.5.3 Enhanced direct memory access (eDMA)
The enhanced direct memory access (eDMA) controller is a second-generation module
capable of performing complex data movements via 16 programmable channels, with
minimal intervention from the host processor. The hardware micro architecture includes a
DMA engine which performs source and destination address calculations, and the actual
data movement operations, along with an SRAM-based memory containing the transfer
control descriptors (TCD) for the channels. This implementation is utilized to minimize the
overall block size.
The eDMA module provides the following features:
●16 channels support independent 8, 16 or 32-bit single value or block transfers
●Supports variable sized queues and circular queues
●Source and destination address registers are independently configured to either post-
increment or to remain constant
●Each transfer is initiated by a peripheral, CPU, or eDMA channel request
●Each eDMA channel can optionally send an interrupt request to the CPU on completion
of a single value or block transfer
●DMA transfers possible between system memories, DSPIs, ADC, FlexPWM, eTimer
and CTU
●Programmable DMA channel multiplexer for assignment of any DMA source to any
available DMA channel with as many as 30 request sources
●eDMA abort operation through software
1.5.4 Flash memory
The SPC560P44Lx, SPC560P50Lx provides as much as 576 KB of programmable, nonvolatile, flash memory. The non-volatile memory (NVM) can be used for instruction and/or
data storage. The flash memory module interfaces the system bus to a dedicated flash
memory array controller. It supports a 32-bit data bus width at the system bus port, and a
128-bit read data interface to flash memory. The module contains four 128-bit wide prefetch
buffers. Prefetch buffer hits allow no-wait responses. Normal flash memory array accesses
are registered and are forwarded to the system bus on the following cycle, incurring two
wait-states.
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The flash memory module provides the following features:
●Hardware and software configurable read and write access protections on a per-master
basis
●Configurable access timing allowing use in a wide range of system frequencies
●Multiple-mapping support and mapping-based block access timing (up to 31 additional
cycles) allowing use for emulation of other memory types.
●Software programmable block program/erase restriction control
●Erase of selected block(s)
●Read page sizes
–Code flash memory: 128 bits (4 words)
–Data flash memory: 32 bits (1 word)
●ECC with single-bit correction, double-bit detection for data integrity
–Code flash memory: 64-bit ECC
–Data flash memory: 64-bit ECC
●Embedded hardware program and erase algorithm
●Erase suspend, program suspend and erase-suspended program
●Censorship protection scheme to prevent flash memory content visibility
●Hardware support for EEPROM emulation
1.5.5 Static random access memory (SRAM)
The SPC560P44Lx, SPC560P50Lx SRAM module provides up to 40 KB of general-purpose
memory.
The SRAM module provides the following features:
●Supports read/write accesses mapped to the SRAM from any master
●Up to 40 KB general purpose SRAM
●Supports byte (8-bit), half word (16-bit), and word (32-bit) writes for optimal use of
memory
●Typical SRAM access time: 0 wait-state for reads and 32-bit writes; 1 wait state for 8-
and 16-bit writes if back to back with a read to same memory block
1.5.6 Interrupt controller (INTC)
The interrupt controller (INTC) provides priority-based preemptive scheduling of interrupt
requests, suitable for statically scheduled hard real-time systems. The INTC handles 147
selectable-priority interrupt sources.
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For high priority interrupt requests, the time from the assertion of the interrupt request from
the peripheral to when the processor is executing the interrupt service routine (ISR) has
been minimized. The INTC provides a unique vector for each interrupt request source for
quick determination of which ISR has to be executed. It also provides a wide number of
priorities so that lower priority ISRs do not delay the execution of higher priority ISRs. To
allow the appropriate priorities for each source of interrupt request, the priority of each
interrupt request is software configurable.
When multiple tasks share a resource, coherent accesses to that resource need to be
supported. The INTC supports the priority ceiling protocol (PCP) for coherent accesses. By
providing a modifiable priority mask, the priority can be raised temporarily so that all tasks
which share the same resource can not preempt each other.
The INTC provides the following features:
●Unique 9-bit vector for each separate interrupt source
●8 software triggerable interrupt sources
●16 priority levels with fixed hardware arbitration within priority levels for each interrupt
source
●Ability to modify the ISR or task priority: modifying the priority can be used to implement
the Priority Ceiling Protocol for accessing shared resources.
●2 external high priority interrupts directly accessing the main core and I/O processor
(IOP) critical interrupt mechanism
1.5.7 System status and configuration module (SSCM)
The system status and configuration module (SSCM) provides central device functionality.
The SSCM includes these features:
●System configuration and status
–Memory sizes/status
–Device mode and security status
–Determine boot vector
–Search code flash for bootable sector
–DMA status
●Debug status port enable and selection
●Bus and peripheral abort enable/disable
1.5.8 System clocks and clock generation
The following list summarizes the system clock and clock generation on the SPC560P44Lx,
SPC560P50Lx:
●Lock detect circuitry continuously monitors lock status
The FMPLL allows the user to generate high speed system clocks from a 4–40 MHz input
clock. Further, the FMPLL supports programmable frequency modulation of the system
clock. The PLL multiplication factor, output clock divider ratio are all software configurable.
●Reduced frequency divider (RFD) for reduced frequency operation without forcing the
PLL to relock
●Frequency-modulated PLL
–Modulation enabled/disabled through software
–Triangle wave modulation
●Programmable modulation depth (±0.25% to ±4% deviation from center frequency):
programmable modulation frequency dependent on reference frequency
●Self-clocked mode (SCM) operation
1.5.10 Main oscillator
The main oscillator provides these features:
●Input frequency range: 4–40 MHz
●Crystal input mode or oscillator input mode
●PLL reference
1.5.11 Internal RC oscillator
This device has an RC ladder phase-shift oscillator. The architecture uses constant current
charging of a capacitor. The voltage at the capacitor is compared by the stable bandgap
reference voltage.
The RC oscillator provides these features:
●Nominal frequency 16 MHz
●±5% variation over voltage and temperature after process trim
●Clock output of the RC oscillator serves as system clock source in case loss of lock or
loss of clock is detected by the PLL
●RC oscillator is used as the default system clock during startup
1.5.12 Periodic interrupt timer (PIT)
The PIT module implements these features:
●4 general purpose interrupt timers
●32-bit counter resolution
●Clocked by system clock frequency
●Each channel can be used as trigger for a DMA request
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1.5.13 System timer module (STM)
The STM module implements these features:
●One 32-bit up counter with 8-bit prescaler
●Four 32-bit compare channels
●Independent interrupt source for each channel
●Counter can be stopped in debug mode
1.5.14 Software watchdog timer (SWT)
The SWT has the following features:
●32-bit time-out register to set the time-out period
●Programmable selection of system or oscillator clock for timer operation
●Programmable selection of window mode or regular servicing
●Programmable selection of reset or interrupt on an initial time-out
●Master access protection
●Hard and soft configuration lock bits
●Reset configuration inputs allow timer to be enabled out of reset
1.5.15 Fault collection unit (FCU)
The FCU provides an independent fault reporting mechanism even if the CPU is
malfunctioning.
The FCU module has the following features:
●FCU status register reporting the device status
●Continuous monitoring of critical fault signals
●User selection of critical signals from different fault sources inside the device
●Critical fault events trigger 2 external pins (user selected signal protocol) that can be
used externally to reset the device and/or other circuitry (for example, safety relay or
FlexRay transceiver)
●Faults are latched into a register
1.5.16 System integration unit – Lite (SIUL)
The SPC560P44Lx, SPC560P50Lx SIUL controls MCU pad configuration, external
interrupt, general purpose I/O (GPIO), and internal peripheral multiplexing.
The pad configuration block controls the static electrical characteristics of I/O pins. The
GPIO block provides uniform and discrete input/output control of the I/O pins of the MCU.
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The SIU provides the following features:
●Centralized general purpose input output (GPIO) control of as many as 80 input/output
pins and 26 analog input-only pads (package dependent)
●All GPIO pins can be independently configured to support pull-up, pull down, or no pull
●Reading and writing to GPIO supported both as individual pins and 16-bit wide ports
●All peripheral pins (except ADC channels) can be alternatively configured as both
general purpose input or output pins
●ADC channels support alternative configuration as general purpose inputs
●Direct readback of the pin value is supported on all pins through the SIUL
●Configurable digital input filter that can be applied to some general purpose input pins
for noise elimination: as many as 4 internal functions can be multiplexed onto 1 pin
1.5.17 Boot and censorship
Different booting modes are available in the SPC560P44Lx, SPC560P50Lx: booting from
internal flash memory and booting via a serial link.
The default booting scheme uses the internal flash memory (an internal pull-down is used to
select this mode). Optionally, the user can boot via FlexCAN or LINFlex (using the boot
assist module software).
A censorship scheme is provided to protect the content of the flash memory and offer
increased security for the entire device.
A password mechanism is designed to grant the legitimate user access to the non-volatile
memory.
Boot assist module (BAM)
The BAM is a block of read-only one-time programmed memory and is identical for all
SPC560Pxx devices that are based on the e200z0h core. The BAM program is executed
every time the device is powered on if the alternate boot mode has been selected by the
user.
The BAM provides the following features:
●Serial bootloading via FlexCAN or LINFlex
●Ability to accept a password via the used serial communication channel to grant the
legitimate user access to the non-volatile memory
1.5.18 Error correction status module (ECSM)
The ECSM provides a myriad of miscellaneous control functions regarding program-visible
information about the platform configuration and revision levels, a reset status register, a
software watchdog timer, wakeup control for exiting sleep modes, and information on
platform memory errors reported by error-correcting codes and/or generic access error
information for certain processor cores.
The Error Correction Status Module supports a number of miscellaneous control functions
for the platform. The ECSM includes these features:
●Registers for capturing information on platform memory errors if error-correcting codes
(ECC) are implemented
●For test purposes, optional registers to specify the generation of double-bit memory
errors are enabled on the SPC560P44Lx, SPC560P50Lx.
●Checker applied on PBRIDGE output toward periphery
●Byte endianess swap capability
1.5.20 Controller area network (FlexCAN)
The SPC560P44Lx, SPC560P50Lx MCU contains one controller area network (FlexCAN)
module. This module is a communication controller implementing the CAN protocol
according to Bosch Specification version 2.0B. The CAN protocol was designed to be used
primarily as a vehicle serial data bus, meeting the specific requirements of this field: realtime processing, reliable operation in the EMI environment of a vehicle, cost-effectiveness
and required bandwidth. The FlexCAN module contains 32 message buffers.
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The FlexCAN module provides the following features:
●Full implementation of the CAN protocol specification, version 2.0B
–Standard data and remote frames
–Extended data and remote frames
–Up to 8-bytes data length
–Programmable bit rate up to 1 Mbit/s
●32 message buffers of up to 8-bytes data length
●Each message buffer configurable as Rx or Tx, all supporting standard and extended
●Programmable transmit-first scheme: lowest ID or lowest buffer number
●Time stamp based on 16-bit free-running timer
●Global network time, synchronized by a specific message
●Maskable interrupts
●Independent of the transmission medium (an external transceiver is assumed)
●High immunity to EMI
●Short latency time due to an arbitration scheme for high-priority messages
●Transmit features
–Supports configuration of multiple mailboxes to form message queues of scalable
depth
–Arbitration scheme according to message ID or message buffer number
–Internal arbitration to guarantee no inner or outer priority inversion
–Transmit abort procedure and notification
●Receive features
–Individual programmable filters for each mailbox
–8 mailboxes configurable as a six-entry receive FIFO
–8 programmable acceptance filters for receive FIFO
●Programmable clock source
–System clock
–Direct oscillator clock to avoid PLL jitter
1.5.21 Safety port (FlexCAN)
The SPC560P44Lx, SPC560P50Lx MCU has a second CAN controller synthesized to run at
high bit rates to be used as a safety port. The CAN module of the safety port provides the
following features:
●Identical to the FlexCAN module
●Bit rate as fast as 7.5 Mbit/s at 60 MHz CPU clock using direct connection between
CAN modules (no physical transceiver required)
●32 message buffers of up to 8 bytes data length
●Can be used as a second independent CAN module
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1.5.22 FlexRay
The FlexRay module provides the following features:
●Full implementation of FlexRay Protocol Specification 2.1
●32 configurable message buffers can be handled
●Dual channel or single channel mode of operation, each as fast as 10 Mbit/s data rate
●Message buffers configurable as Tx, Rx or RxFIFO
●Message buffer size configurable
●Message filtering for all message buffers based on FrameID, cycle count and message
ID
●Programmable acceptance filters for RxFIFO message buffers
1.5.23 Serial communication interface module (LINFlex)
The LINFlex (local interconnect network flexible) on the SPC560P44Lx, SPC560P50Lx
features the following:
●Supports LIN Master mode, LIN Slave mode and UART mode
●LIN state machine compliant to LIN1.3, 2.0, and 2.1 specifications
●Handles LIN frame transmission and reception without CPU intervention
●LIN features
–Autonomous LIN frame handling
–Message buffer to store Identifier and as much as 8 data bytes
–Supports message length as long as 64 bytes
–Detection and flagging of LIN errors (sync field, delimiter, ID parity, bit framing,
checksum, and time-out)
–Classic or extended checksum calculation
–Configurable Break duration as long as 36-bit times
–Diagnostic features: Loop back; Self Test; LIN bus stuck dominant detection
–Interrupt-driven operation with 16 interrupt sources
●LIN slave mode features
–Autonomous LIN header handling
–Autonomous LIN response handling
●UART mode
–Full-duplex operation
–Standard non return-to-zero (NRZ) mark/space format
–Data buffers with 4-byte receive, 4-byte transmit
–Configurable word length (8-bit or 9-bit words)
–Error detection and flagging
–Parity, Noise and Framing errors
–Interrupt-driven operation with four interrupt sources
–Separate transmitter and receiver CPU interrupt sources
–16-bit programmable baud-rate modulus counter and 16-bit fractional
–2 receiver wake-up methods
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1.5.24 Deserial serial peripheral interface (DSPI)
The deserial serial peripheral interface (DSPI) module provides a synchronous serial
interface for communication between the SPC560P44Lx, SPC560P50Lx MCU and external
devices.
The DSPI modules provide these features:
●Full duplex, synchronous transfers
●Master or slave operation
●Programmable master bit rates
●Programmable clock polarity and phase
●End-of-transmission interrupt flag
●Programmable transfer baud rate
●Programmable data frames from 4 to 16 bits
●Up to 20 chip select lines available
–8 on DSPI_0
–4 each on DSPI_1, DSPI_2 and DSPI_3
●8 clock and transfer attributes registers
●Chip select strobe available as alternate function on one of the chip select pins for
deglitching
●FIFOs for buffering as many as 5 transfers on the transmit and receive side
●Queueing operation possible through use of the eDMA
●General purpose I/O functionality on pins when not used for SPI
1.5.25 Pulse width modulator (FlexPWM)
The pulse width modulator module (PWM) contains four PWM submodules, each capable of
controlling a single half-bridge power stage. There are also four fault channels.
This PWM is capable of controlling most motor types: AC induction motors (ACIM),
permanent magnet AC motors (PMAC), both brushless (BLDC) and brush DC motors
(BDC), switched (SRM) and variable reluctance motors (VRM), and stepper motors.
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The FlexPWM block implements the following features:
●16-bit resolution for center, edge-aligned, and asymmetrical PWMs
●Maximum operating clock frequency of 120 MHz
●PWM outputs can operate as complementary pairs or independent channels
●Can accept signed numbers for PWM generation
●Independent control of both edges of each PWM output
●Synchronization to external hardware or other PWM supported
●Double buffered PWM registers
–Integral reload rates from 1 to 16
–Half cycle reload capability
●Multiple ADC trigger events can be generated per PWM cycle via hardware
●Write protection for critical registers
●Fault inputs can be assigned to control multiple PWM outputs
●Programmable filters for fault inputs
●Independently programmable PWM output polarity
●Independent top and bottom deadtime insertion
●Each complementary pair can operate with its own PWM frequency and deadtime
values
●Individual software-control for each PWM output
●All outputs can be programmed to change simultaneously via a “Force Out” event
●PWMX pin can optionally output a third PWM signal from each submodule
●Channels not used for PWM generation can be used for buffered output compare
functions
●Channels not used for PWM generation can be used for input capture functions
●Enhanced dual-edge capture functionality
●eDMA support with automatic reload
●2 fault inputs
●Capture capability for PWMA, PWMB, and PWMX channels not supported
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1.5.26 eTimer
The SPC560P44Lx, SPC560P50Lx includes two eTimer modules. Each module provides
six 16-bit general purpose up/down timer/counter units with the following features:
●Maximum operating clock frequency of 120 MHz
●Individual channel capability
–Input capture trigger
–Output compare
–Double buffer (to capture rising edge and falling edge)
–Result alignment circuitry (left justified; right justified)
–32-bit read mode allows to have channel ID on one of the 16-bit part
–DMA compatible interfaces
1.5.28 Cross triggering unit (CTU)
The cross triggering unit allows automatic generation of ADC conversion requests on user
selected conditions without CPU load during the PWM period and with minimized CPU load
for dynamic configuration.
It implements the following features:
●Double buffered trigger generation unit with as many as eight independent triggers
generated from external triggers
●Trigger generation unit configurable in sequential mode or in triggered mode
●Each Trigger can be appropriately delayed to compensate the delay of external low
pass filter
●Double buffered global trigger unit allowing eTimer synchronization and/or ADC
command generation
●Double buffered ADC command list pointers to minimize ADC-trigger unit update
●Double buffered ADC conversion command list with as many as 24 ADC commands
●Each trigger has the capability to generate consecutive commands
●ADC conversion command allows to control ADC channel from each ADC, single or
synchronous sampling, independent result queue selection
1.5.29 Nexus development interface (NDI)
The NDI (Nexus Development Interface) block provides real-time development support
capabilities for the SPC560P44Lx, SPC560P50Lx Power Architecture based MCU in
compliance with the IEEE-ISTO 5001-2003 standard. This development support is supplied
for MCUs without requiring external address and data pins for internal visibility. The NDI
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block is an integration of several individual Nexus blocks that are selected to provide the
development support interface for this device. The NDI block interfaces to the host
processor and internal busses to provide development support as per the IEEE-ISTO 50012003 Class 2+ standard. The development support provided includes access to the MCU’s
internal memory map and access to the processor’s internal registers during run time.
The Nexus Interface provides the following features:
●Configured via the IEEE 1149.1
●All Nexus port pins operate at V
●Nexus 2+ features supported
(no dedicated power supply)
DDIO
–Static debug
–Watchpoint messaging
–Ownership trace messaging
–Program trace messaging
–Real time read/write of any internally memory mapped resources through JTAG
pins
–Overrun control, which selects whether to stall before Nexus overruns or keep
executing and allow overwrite of information
–Watchpoint triggering, watchpoint triggers program tracing
●Auxiliary Output Port
–4 MDO (Message Data Out) pins
–MCKO (Message Clock Out) pin
–2 MSEO
–EVTO
●Auxiliary Input Port
–EVTI
(Message Start/End Out) pins
(Event Out) pin
(Event In) pin
1.5.30 Cyclic redundancy check (CRC)
The CRC computing unit is dedicated to the computation of CRC off-loading the CPU. The
CRC module features:
●Support for CRC-16-CCITT (x25 protocol):
16
–x
●Support for CRC-32 (Ethernet protocol):
–x
●Zero wait states for each write/read operations to the CRC_CFG and CRC_INP
The JTAG controller (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.
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The JTAG controller provides the following features:
●IEEE Test Access Port (TAP) interface with 4 pins (TDI, TMS, TCK, TDO)
●Selectable modes of operation include JTAGC/debug or normal system operation.
●A 5-bit instruction register that supports the following IEEE 1149.1-2001 defined
instructions:
–BYPASS, IDCODE, EXTEST, SAMPLE, SAMPLE/PRELOAD
●A 5-bit instruction register that supports the additional following public instructions:
–ACCESS_AUX_TAP_NPC, ACCESS_AUX_TAP_ONCE
●3 test data registers: a bypass register, a boundary scan register, and a device
identification register.
●A TAP controller state machine that controls the operation of the data registers,
instruction register and associated circuitry.
1.5.32 On-chip voltage regulator (VREG)
The on-chip voltage regulator module provides the following features: