Hardwa re so ft w ar e, Proc ess p roce s s – Rainbow Electronics AT89C5132 User Manual

Page 7

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AT89C5132

4256A–USB–06/03

Figure 2. Boot Process Algorithm

Hardwa

re

So

ft

w

ar

e

Hard Cond?

ISP# = L?

RESET

Hard Cond Init

ENBOOT = 1

PC = F000h

FCON = 00h

Prog Cond?

BLJB = P?

Standard Init

ENBOOT = 0

PC = 0000h

FCON = F0h

Prog Cond Init

ENBOOT = 1

PC = F000h

FCON = F0h

User’s

Application

Proc

ess

P

roce

s

s

Hard Init?

FCON = 00h?

User Boot?
SBV < F0h?

User’s

Bootloader

Atmel’s

Bootloader

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