AN2690 Freescale Semiconductor / Motorola, AN2690 Datasheet - Page 5

• Manufacturer Part Number: AN2690
• Description: Low Frequency EEPROM Emulation on the MC68HLC908QY4
• Manufacturer: Freescale Semiconductor / Motorola

MOTOROLA
ServiceOtherRst ()
Low Frequency EEPROM Emulation on the MC68HLC908QY4
Freescale Semiconductor, Inc.
For More Information On This Product,
N
Figure 1. Method 1 — Flow Diagram
N
ILOP Initialization()
Clear ProgEE Flag
PrepareForReset
ProgEE flag
ProgEE()
ForceReset
ILOP?
Wait for
Reset?
Go to: www.freescale.com
Y
Y
Clear System Tick Flag
N
N
Switch to Xtal clock ()
Y
POR Initialization()
Enable Interrupts
CommonInit()
ProgEE Flag
System Tick
Init Timers()
Function n()
Function1()
Flag set?
POR?
Start
set?
Method 1 — Reset Forced at Start of Main Loop
Y
N
Y
Delay approx 125ms
for 32KHz osc (4096
cycles)
AN2690
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