MC68HC705J2 Datasheet, PDF (51/82 Pages) Freescale Semiconductor, Inc – member of the low-cost

Freescale Semiconductor, Inc.
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SECTION 9
MC68HC05J1 EMULATION MODE
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This section describes how to use the MC68HC05J1 emulation mode to achieve
compatibility with MC68HC05J1 devices.
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9.1 Bootloading
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Use the bootloader function to put the MCU in MC68HC05J1 emulation mode. To
activate the emulation mode:
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1. Connect pin PB5 to V_DD in the bootloader circuit.
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2. Program the J1 bit (in the mask option register) high.
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9.2 MC68HC05J1 Emulation
In MC68HC05J1 emulation mode, the MCU operates as an MC68HC05J1 with the
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following exceptions:
• The emulation mode does not support the RC oscillator mask option of the
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MC68HC05J1.
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• The emulation mode does not support the STOP disable mask option of the
MC68HC05J1.
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• The emulation mode has no self-check function.
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MC68HC05J1 EMULATION MODE
Rev. 2
9-1
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