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iCE40LP8K
The iCE40LP8K (U5/U22) is one of the devices on the board used to demonstrate the Lattice Type-C Power Deliv-
ery (PD) management and Cable Detect (CD) solution. In order to support the variety of demos, the iCE device
provides multiple parallel and serial connections to the MachXO2 device on the board. Table 5 and Table 6 provide
the detailed definition of the connections. Both the devices are connected to the J18 (Embedded Controller
header).
The iCE configuration may be stored in external SPI Flash (Refer the section Programming Mux and Switch Set-
tings for more information. The external SPI Flash (U10) is connected to the configuration SPI port of the iCE
device. These signals, along with the CDONE and CRESET signals from the iCE are connected to the MachXO2-
4000ZE device to facilitate connection from the PC (for programming) to both the iCE and SPI Flash.
The 25 MHz oscillator X2 is used to provide an external clock signal to the iCE40LP device. This clock signal is
also passed to the iCE5LP device. Table 7 provides the detailed definition of the clock connections.
Table 7. Clock Connections for iCE40LP
ICE40LP8K(U22)
IO Ball
D8
Power Supply
Power supply to the development kit is by the MINI-USB Type-B connector or from an external adaptor. This con-
nector provides 5 V source for the voltage regulators on the board which supply the power to MachXO2 and iCE
devices on the board. Each IO and core voltage rail on the board is accessible by a test point on the board. The
current flowing to each rail can also be measured using a 1
Figure 5 shows the device power rails. There are three voltage regulators on the board used to supply the 3.3 V,
1.8 V, and 1.2 V rails. The input to these regulators is the 5 V rail on the board, which is supplied from either the
MINI-USB Type-B connector or external power adaptor via switch SW2.
Figure 5. Device Power Rails
Several of the voltage rails also connect to indicator LEDs on the board to display the power status to the user.
These LEDs are listed in Table 8.
Bank
IO Ball
1
20
J8
EXT
ADAPTER
J2
USB MINI
USB Type-C Demo Kit V2 Board
ICE5LP4K(U5)
Bank
2
Ω
resistor placed in the path of each voltage rail.
U14
SW2
LD0
5V
U15
LD0
U21
LD0
10
Schematic Net
Name
CLK IN
VCC3V3
VCC1V2
DP3V3
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