MPC564EVB Freescale Semiconductor, MPC564EVB Datasheet - Page 855
![KIT EVAL FOR MPC561/562/563/564](/photos/39/39/393946/mpc564evbimage_sml.jpg)
MPC564EVB
Manufacturer Part Number
MPC564EVB
Description
KIT EVAL FOR MPC561/562/563/564
Manufacturer
Freescale Semiconductor
Type
Microcontrollerr
Specifications of MPC564EVB
Contents
Module Board, Installation Guide, Power Supply, Cable, Software and more
Processor To Be Evaluated
MPC56x
Data Bus Width
32 bit
Interface Type
RS-232, Ethernet
For Use With/related Products
MPC561, 562, 563, 564
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Chapter 20
Dual-Port TPU3 RAM (DPTRAM)
The dual-port RAM (DPTRAM) module with TPU3 microcode storage support consists of a control
register block and an 8-Kbyte array of static RAM, which can be used either as a microcode storage for
TPU3 or as a general-purpose memory. The MPC561/MPC563 has one DPTRAM module. The module
serves two TPU3 modules (A and B).
The DPTRAM module acts as a common memory on the IMB3 and allows the transfer of data to the two
TPU3 modules. Therefore, the DPTRAM interface includes an IMB3 bus interface and two TPU3
interfaces. When the DPTRAM is being used in microcode mode, the array is only accessible to the TPU3
via a separate local bus, and not via the IMB3.
In the MPC561/MPC563, the DPTRAM base address register (RAMBAR) must be set to a particular value
to fit into the IMB memory map of the part. The DPTRAM RAMBAR register must be programmed to
0xFFA0.
The DPTRAM module is powered by V
RAM if standby power is supplied via the IRAMSTBY pin of the MPC561/MPC563. IRAMSTBY must
be supplied by an external source.
The DPTRAM may also be used as the microcode control store for up to two TPU3 modules when placed
in a special emulation mode. In this mode the DPTRAM array may only be accessed by either or both of
the TPU3 units simultaneously via separate emulation buses, and not via the IMB3.
The DPTRAM contains a multiple input signature calculator (MISC) in order to provide RAM data
corruption checking. The MISC reads the DPTRAM address and generates a 32-bit data-dependent
signature. This signature can then be checked by the host.
20.1
Freescale Semiconductor
•
•
•
•
Eight Kbytes of static RAM
Accessible by the CPU only if neither TPU3 is in emulation mode
Low-power stop operation
— Entered by setting the STOP bit in the DPTMCR
— Does not enter low-power state while in TPU3 emulation mode for protection
TPU3 microcode mode
Features
The RCPU cannot perform instruction fetches from any module on the
IMB3 (including the DPTRAM). Only data accesses are permitted.
MPC561/MPC563 Reference Manual, Rev. 1.2
DD
in normal operation. The entire array may be used as standby
NOTE
20-1
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