Velodyne VLS-128, User Manual, Page: 79 / 132

pwr_3_3v = 2693
(raw value)
(2693 * 5.0) / 4096 = 3.287 V
10.2.3.3.6 top:pwr_raw
This is the top board's unregulated power rail. Its operating range is 1.6 V to 1.9 V.
To convert the raw value, use Equation 10-1 on page 77 .
Example:
pwr_raw = 1428
(raw value)
(1428 * 5.0) / 4096 = 1.743
10.2.3.3.7 top:pwr_vccint
This is the top board's 1.2 V rail. Its operating range is 1.0 V to 1.4 V.
To convert the raw value, use Equation 10-1 on page 77 .
Example:
pwr_vccint = 977
(raw value)
(977 * 5.0) / 4096 = 1.193 V
10.2.3.3.8 bot:i_out
This is the sensor's input power line. Its operating range is 0.3 A to 1.0 A. (It spikes whenever the motor spins up.)
To convert the raw value, use Equation 10-2 on page 77 .
Example:
i_out = 2086
(raw value)
(2086 * 5.0) / 4096 = 2.546
10.0 * (2.546 - 2.5) = 0.464 A
10.2.3.3.9 bot:lm20_temp
This field indicates the temperature of the bottom board. Its operating range is -25.0° C to 90.0° C.
To convert the raw value, use
Equation 10-3 on page 77
.
Example:
lm20_temp = 1231 (raw value)
(1105 * 5.0) / 4096 = 1.503
-1481.96 + SQRT(2. ((1.8639 – 1.503) / 3.88E-6)) = 31.082° C
Chapter 10 • Sensor Communication 79
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