Texas Instruments EVM430-FR6989, Руководство пользователя, Страница: 13 / 22

BUT1 VR1
1
2
3
BUT2
Motor
Driver
MCU
P
o
w
er
S
w
itc
h
On
<
O
ff
Motor
1
2
3V3
GND
EXT_PWR
3 2 1
PWR_SEL
1-2 BAT
2-3 EXT
2
1
RST
TEST
SBW
1
2
3
I2C 1-
GND
2-
S
DA
3-
S
CL
UA
R
T
1-
GND
2-
RX
D
3-
TX
D
Optical
Sensor
www.ti.com
Motor Board
Table 9. LC Sensor Component Example
LC Sensor
Capacitor Generic C0G/NP0 220-pF ceramic capacitor
Inductor 470 µH Radial type (Murata 11R474C, DigiKey: 811-2034-ND)
4 Motor Board
The motor board is MCU controlled with speed adjustment and bidirectional rotation. With attaching the
rotating disc, this motor board can simulate the rotation of a propeller inside flow meters.
Figure 6. Motor Board Layout
There are two power sources available, the battery power and the external power. To use battery power,
insert two 1.5-V AAA alkaline batteries. Connect pin 1-2 of PWR_SEL. To use external power, connect pin
2-3 of JP2. Connect a 3.3-V power to pin 1 and GND to pin 2 of EXT_PWR.
Table 10. Motor Board Power Source Jumper Setting
Power Source PWR_SEL
Battery Powered 1-2
External Power 2-3
Table 11. Motor Board External Power Pin Setting
EXT_PWR
Pin 1 3.3 V
Pin 2 GND
WARNING: To minimize the risk of personal injury or property damage, never use
rechargeable batteries to power the boards. Only use 1.5-V AAA alkaline batteries.
CAUTION: If the board is powered externally, use bench power supply. BE AWARE THAT
THE BOARD IS NOT EQUIPPED WITH A POWER PROTECTION CIRCUIT.
13 SLAU611 – January 2015 EVM430-FR6989 Evaluation Kit
Submit Documentation Feedback
Copyright © 2015, Texas Instruments Incorporated