Texas Instruments PGA450Q1EVM-S, Руководство пользователя

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Setup and Operation
5 SLDU019B – December 2015 – Revised March 2016
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PGA450Q1EVM-S User's Guide and TIDA-00151 UART Demo Instructional
2.2.2 Programming the PGA450-Q1 EEPROM
The PGA450Q1EVM-S is preloaded with the EEPROM values listed in Table 2 . These instructions are
provided in the event that the user prefers to modify the EEPROM using the PGA450Q1EVM GUI, rather
than the corresponding UART command. Use the steps that follow to program the device for EEPROM
memory.
Step 1. Assuming the MCU status is still set to MICRO IS IN RESET , go to the EEPROM tab, and
enter the register values for addresses 0x00 through 0x1F as listed in Table 3 .
The values at 0x00 to 0x1F are the threshold values used in software. TI recommends that the user
begins with the example values provided, and then adjusts these values later as necessary.
The value at address 0x1F is the sensor address.
Step 2. Click the WRITE SELECTED button. To ensure the threshold values are written correctly,
click the READ ALL button.
Step 3. Click the PROGRAM EEPROM button to store the threshold values.
Step 4. Click the Reload button. To ensure the threshold values have been written correctly and
retained, click the READ ALL button. The EEPROM table should appear as shown in
Figure 3 .
Table 3. EEPROM Register Map Values
Register Address Register Value Description
0x00 0xFF Threshold level 0
0x01 0xD7 Threshold level 1
0x02 0x95 Threshold level 2
0x03 0x84 Threshold level 3
0x04 0x62 Threshold level 4
0x05 0x62 Threshold level 5
0x06 0x52 Threshold level 6
0x07 0x78
Where in FIFO to apply threshold level 7 defined at
EEPROM address 0x08 from to the end of the FIFO. Long
mode (most significant hex) multiplied by 40 [interval 40 to
600]. Short mode (least significant hex) multiplied by 8
[interval 8 to 120].
0x08 0x64
Threshold level 7, the fixed level of threshold to end of
FIFO. Long mode and short mode multiplied by 5 and 1
respectively.
0x09 0x95
Threshold ignore count from beginning of FIFO for long
(most significant hex) and short (least significant hex)
modes respectively.
0x0A 0x43
1-6 change interval of the threshold level across FIFO for
long mode (most significant hex) multiplied by 8 [interval 8
to 120]. Short mode (least significant hex) multiplied by 2
[interval 2 to 15].
0x0B 0x12 PULSE_CNTA
0x0C 0xFF BLANKING_TIMER
0x0D 0x06 FIFO_CTRL
0x0E 0x32 DOWNSAMPLE
0x0F 0x01 CONTROL_1
0x10 0x00 BURST_MODE
0x11 0x8A BURST_ONA_LSB
0x12 0x8A BURST_OFFA_LSB
0x13 0x05 DEADTIME
0x14 0x09 SAT_DEGLITCH
0x15 0x03 BPF_B1_MSB
0x16 0x2D BPF_B1_LSB
0x17 0xEC BPF_A2_MSB