MC68HC05B6_13 Datasheet, PDF(264/302 Page) Freescale Semiconductor, Inc – Microcontrollers

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MC68HC05B6_13 Datasheet, PDF (264/302 Pages) Freescale Semiconductor, Inc – Microcontrollers

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14

Preliminary Reset

IRQ at 2xVDD? N

Y

TCAP1=VDD? N

Y

Y

SEC bit active? N

Bootstrap mode

User mode

Non-user mode

Parallel E/EEPROM bootstrap

Erased EPROM verification

Y

PD3 set?

Y

SEC bit active?

Red LED on

N

N

Red LED on

Preliminary N

PD2 set?

Y

N

PD1 set?

Y

EPROM erased?

Y

N

Y

PD4 set?

N

Y

PD2 set?

N

Jump to RAM

($0051)

Serial RAM

load/execute

Non-user mode

Green LED on

Y

SEC bit active?

Red LED on

Preliminary PD1 set?

N

Erase EEPROM1

Red LED off

N

C

N

Y

PD4 set?

A

B

Figure H-3 Modes of operation flow chart (1 of 2)

Freescale

H-14

MC68HC705B32

MC68HC05B6

Rev. 4.1

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