Ranges and Typical Setup for Evaluation
3
Ranges and Typical Setup for Evaluation
shows the acceptable ranges of values that can be entered for each variable in the GUI.
Table 4. Ranged for GUI Variables
Variable
Decimal Range
SPI Command Range
Number of Options
Set the prescaler and SDO status:
Drop-down menu
0x40–0x51
18
Select the channel:
Drop-down menu
0xE0–0xE1
2
Set the band-pass center frequency:
0 through 63
0x00–0x3F
64
Set the gain:
0 through 63
0x80–0xBF
64
Set the integration time constant:
0 through 31
0xC0–0xDF
32
EVM external clock frequency
4, 5, 6, 8, 10, 12, 16, 20,
Not Applicable
9
24
Integration window setting
Not Applicable
0x0000–0xFFFF
65536
Typical test set-up:
• External signal to CH1 or CH2:
300 mV peak to peak, 7.2-kHz signal to Channel 1
• EVM external clock frequency:
6 MHz
• Bandpass center frequency:
7.27 KHz (42
nd
gain setting (0x22), SPI 0x2A)
• Gain:
.381 (34
th
gain setting (0x22), SPI 0xA2)
• Integration time constant:
106 µs (10th code, SPI 0xCA)
• Integration window setting:
0x0110
Refer to
to see how to input these settings into the GUI.
Figure 5. GUI Inputs
7
SLIU012 – December 2015
TPIC8101 Evaluation Module
Copyright © 2015, Texas Instruments Incorporated