iCE40 UltraPlus Mobile Development Platform
Evaluation Board User Guide
© 2017-2018 Lattice Semiconductor Corp. All Lattice trademarks, registered trademarks, patents, and disclaimers are as listed at
www.latticesemi.com/legal
.
All other brand or product names are trademarks or registered trademarks of their respective holders. The specifications and information herein are subject to change without notice.
FPGA-EB-02007-1.1
9
4.
Clock Sources
A 27 MHz oscillator is built on the Mobile Development Platform board. External clock input can also be provided to
this board depending on the J23 settings.
There are six devices sharing the same clock source that are available at the same time. These include four
iCE40UP5K(U1~U4) devices that are responsible for various demos, U43 which is a stereo audio DAC with direct drive
headphone amplifier, and U39 which is an ultra-compact size 640 x 480 image sensor.
Short Pins 2-3 leads the onboard 27 MHz clock to these devices and provides external clock source through Pin 2 and
Pin 3 (GND).
U14
On Board
27 MHz
External
Clock
Source
U1 ICE40UP5K
–
A
(Display Demo)
U2 ICE40UP5K
–
B
(Audio Demo)
U3 ICE40UP5K
–
C
(Sensor Demo)
U4 ICE40UP5K
–
D
(Camera Demo)
U43 Max9850
(Audio DAC&Amplifier, Audio Demo)
U39 OVM7692
(Image Sensor, Camera Demo)
Figure 4.1. Clock Sources for the iCE40 UltraPlus MDP Board
