Introduction
MPC5565 Microcontroller Reference Manual, Rev. 1.0
Freescale Semiconductor
1-15
processor, and for a write operation, the data from the processor is written to cache. If the access does not
match a valid cache tag entry (misses in the cache), or a write access is required to memory, the cache
performs a bus cycle on the system bus.
1.4.12
Static RAM (SRAM)
The MPC5500 family internal SRAM module provides a general-purpose memory block that supports
mapped read/write accesses from any master. The SRAM size is 80 KB. Included within the SRAM block
is a 32-KB block powered by a separate supply for standby operation and ECC error correction and
detection.
1.4.13
Boot Assist Module (BAM)
The boot assist module (BAM) is read-only memory programmed by Freescale and is identical for all
MCUs with an e200z6 core. The BAM program executes every time the MCU is powered on, or when
reset in normal mode. The BAM supports theseboot modes:
•
Booting from internal flash memory
•
Single master booting from external memory
•
Serial boot loading (program is downloaded to SRAM over an eSCI or FlexCAN peripheral and
then executed)
The BAM reads the reset configuration halfword (RCHW) from flash memory (either internal or external)
to configure the device hardware. The MMU is then configured for all resources and maps all physical
addresses to logical addresses with the minimum address translation, to allow application boot code to
execute as either Classic Power Architecture Book E code (default) or as Freescale VLE code.
1.4.14
Enhanced Management Input/Output System (eMIOS)
The enhanced modular I/O system (eMIOS) module generates or measures time events. A unified channel
(UC) module provides a consistent interface to a superset of all the MIOS channel functionality. This
allows more flexibility to program each unified channel for different functions in different applications.
To identify up to two timed events, each UC uses two comparators, a time base selector, and registers. This
structure can produce match events to measure or generate a waveform. Alternatively, input events can
capture the time base, allowing measurement of an input signal.
1.4.15
Enhanced Time Processing Unit (eTPU)
The enhanced time processing unit (eTPU) is an enhanced coprocessor designed for timing control.
Operating in parallel with the host CPU, the eTPU processes instructions and real-time input events,
performs output waveform generation, and accesses shared data without host intervention. Consequently,
for each timer event, the CPU setup and service times are minimized or eliminated. In the MCU, the TPU
engine is combined with shared instruction and data RAM to form a powerful time processing subsystem.
The MPC5565 has one eTPU engine. High-level assembler/compiler and documentation can be used to
develop customized functions for the eTPU. The eTPU supports several features of older TPU versions,
making it easy to port older applications.
Содержание MPC5565
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Страница 577: ...Boot Assist Module BAM MPC5565 Microcontroller Reference Manual Rev 1 0 15 18 Freescale Semiconductor...
Страница 895: ...Deserial Serial Peripheral Interface DSPI MPC5565 Microcontroller Reference Manual Rev 1 0 19 72 Freescale Semiconductor...
Страница 973: ...Preface MPC5565 Microcontroller Reference Manual Rev 1 0 21 36 Freescale Semiconductor...
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Страница 1153: ...Calibration MPC5565 Microcontroller Reference Manual Rev 1 0 B 8 Freescale Semiconductor...