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