8A3xxxx 72QFN EVK User Manual
© 2019 Integrated Device Technology, Inc.
7
February 14, 2019
Figure 3. GPIO Setting and Status Display Area
1.5
USB Jack
The board has a USB mini-connector. The other end of the USB cable is a USB Type A connector going to a PC.
1.6
I
2
C between FTDI, CM Device, and Onboard EEPROM
One of the major differences between the 72QFN and 144BGA144 chips is that there is only one serial bus on the 72QFN chip. The I
2
C bus
between the FTDI chip and CM chip is the same bus between the CM chip and the onboard EEPROM. The onboard EEPROM is used to store
device firmware and/or customer’s configuration data. JP12 and JP13 must be jumped between pin 1 and 2 to enable the I
2
C connections.
Table 2.
EEPROM I
2
C Connections
JP12/JP13
JP12/JP13
Jumper Position
Pin 1 and 2
Pin 2 and 3
EEPROM I
2
C Path
FDTI and CM Chip;
CM Chip and EEPROM
N/A
