mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 578

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Overview
25.1.2 Features
The EzPort includes the following features:
25.1.3 Modes of Operation
The EzPort can operate in one of two different modes, enabled or disabled.
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• Serial interface that is compatible with a subset of the SPI format.
• Able to read, erase and program flash memory.
• Able to reset the micro-controller, allowing it to boot from the flash memory after the
• Enabled — When enabled, the EzPort steals access to the flash memory, preventing
• Disabled — When the EzPort is disabled, the rest of the micro-controller can access
memory has been configured.
access from other cores or peripherals. The rest of the microcontroller is disabled to
avoid conflicts. The flash is configured for NVM Special Mode.
flash memory as normal.
Flash Memory
Controller
Flash
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Figure 25-1. EzPort Block Diagram
Micro-controller
EzPort Enabled
Core
Preliminary
EzPort
Reset
Reset Controller
G
Reset Out
Freescale Semiconductor, Inc.
EZP_CS
EZP_CK
EZP_D
EZP_Q