Lattice Semiconductor iCE40 UltraLite User Manual page 13

Breathe Ramp [3:0]
0000*
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Blink Rate [3:0]
0000
0001
0010
0011
0100
0101*
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
1. By default, the LED "On-Time" is fixed at approximately one second.
iCE40 UltraLite Breakout Board
Factor
.0x (fast)
.063x
.125x
.25x
.5x
1x
2x
4x (slow)
—
—
—
—
—
—
—
—
1
Off Time (s)
Always On
1/16 (fast)
1/8
1/4
1/2
1
2
4
Always Off
—
—
—
—
—
—
—
13