CYUSB3KIT-001 EZ-USB FX3 Development Kit Guide, Doc. #: 001-70237 Rev. *C
42
Kit Operation
Table 3-2
shows the FX3 boot interfaces according to the PMODE[2:0] settings. “USB Fallback”
means that USB is used to boot code if the indicated interface is not present.
Note
“Z” = floating I/O pin state.
On the DVK board, the PMODE [2:0] pins are available through jumpers J98, J97, and J96, and
switch SW25.
Table 3-3
shows the details of the jumper and switch combination to select a specific
boot option.
Note
The “OFF” setting on dipswitch SW25 means logical 1 on the corresponding PMODE pin.
See
AN76405 - EZ-USB FX3 Boot Options
for an explanation of each of these boot options.
Table 3-2. Boot Options with PMODE Pins
PMODE2 Pin
state
PMODE1 Pin
state
PMODE0 Pin
state
Boot Option
USB Fallback
Z
0
0
Sync ADMUX(16-bit)
No
Z
0
1
Async ADMUX(16-bit)
No
Z
1
1
USB Boot
Yes
Z
0
Z
SRAM16-bit)
No
1
Z
Z
I2C
No
Z
1
Z
I2C=> USB
Yes
0
Z
1
SPI=> USB
Yes
Table 3-3. PMODE Pin Options on DVK Board
PMODE Pin
PMODE Pin
State
Jumper and Dip Switch Combination for PMODE Pin State
PMODE2
Z
1. No jumper installed on J98
2. SW25.3 – Don't care (the switch can be either turned ON or OFF)
1
1. Short pins 2–3 of jumper J98
2. SW25.3 set to OFF
0
1. Short pins 2–3 of jumper J98
2. SW25.3 set to ON
PMODE1
Z
1. No jumper installed on J97
2. SW25.2 – Don't care (the switch can be either turned ON or OFF)
1
1. Short pins 2–3 of jumper J97
2. SW25.2 set to OFF
0
1. Short pins 2–3 of jumper J97
2. SW25.2 set to ON
PMODE0
Z
1. No jumper installed on J96
2. SW25.1 – Don't care (the switch can be either turned ON or OFF)
1
1. Short pins 2–3 of jumper J96
2. SW25.1 set to OFF
0
1. Short pins 2–3 of jumper J96
2. SW25.1 set to ON
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