CYUSB3KIT-001 EZ-USB FX3 Development Kit Guide, Doc. #: 001-70237 Rev. *C
48
Kit Operation
3.7.2
Booting from I
2
C EEPROM
Change the PMODE pins on the DVK board to Z1Z to enable I2C boot. On the DVK board, this is
done by configuring the jumpers and switches, as shown in
Table 3-6
. Press RESET button SW8.
The FX3 DVK board re-enumerates with the boot image in the I
2
C EEPROM.
3.7.3
Choosing the Correct I
2
C EEPROM Configuration
Before mounting the I
2
C EEPROM into the U44 socket, you need to consider the following factors to
select the correctly configured EEPROM for the respective size of the firmware image.
■
Verify that the I
2
C EEPROM can accommodate the firmware image built in Release mode. Check
the addressing (A0, A1, and A2) mechanism for the EEPROM part and select these pins on
board using SW40. Follow the steps to decide on the addressing mechanism for the different
EEPROM configurations.
❐
The typical EEPROM pins consists of A0, A1, and A2 address lines. FX3 can address eight
EEPROM (000–111). The address selection can be done using dip switch SW40.
Figure 3-17. EEPROM Block Diagram
Table 3-6. I2C Boot Jumper and Dip Switch Settings
PMODE )in
Required PMODE Pin
State
Jumper and Dip Switch Combination
PMODE2
Z
1. No jumper installed on J98
2. SW25.3 – Don't care (the switch can be either turned ON or OFF
PMODE1
1
1. Short pins 2–3 of jumper J97
2. SW25.2 set to OFF
PMODE0
Z
1. No jumper installed on J96
2. SW25.1 – Don't care (the switch can be either turned ON or OFF)
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