Texas Instruments BOOSTXL-ULN2003, Руководство пользователя

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Green
1
2
D1
Green
1
2
D2
Green
1
2
D3
Green
1
2
D4
DGND
IN1 IN2 IN3 IN4
0
R5
1.0k
R1
1.0k
R7
1.0k
R3
1.0k
R4
Hardware Description
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10 SLCU002 – September 2016
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Copyright © 2016, Texas Instruments Incorporated
BOOSTXL-ULN2003 Dual Stepper Motor Driver BoosterPack Hardware
2.4.3 LEDs
The four on-board LEDs provide visual feedback for the IN1 through IN4 signals. When operating in 3-pin
mode these LEDs are driven by the SN74HC595, and when operating in 8-pin mode these LEDs are
being driven directly by the MSP430 GPIO pins.
If the user wants to disable the onboard LEDs, resistor R5 can be removed. Additional details are found in
Section 2.6.2 .
Figure 9. Board Image of LEDs Figure 10. Schematic View of LEDs
Table 3. LED Description
Reference Description
D1
D1 is connected to the signal IN1. D1 is on when IN1 is high, and is off when IN1 is low.
When IN1 is high, M1_CH1 is activated – ultimately being pulled to AGND as the CSD17571Q2
inverts the logic signal.
D2
D2 is connected to the signal IN2. D2 is on when IN2 is high, and is off when IN2 is low.
When IN2 is high, M1_CH2 is activated – ultimately being pulled to AGND as the ULN2003A inverts
the logic signal.
D3
D3 is connected to the signal IN3. D3 is on when IN3 is high, and is off when IN3 is low.
When IN3 is high, M1_CH3 is activated – ultimately being pulled to AGND as the ULN2003A inverts
the logic signal.
D4
D4 is connected to the signal IN4. D4 is on when IN4 is high, and is off when IN4 is low.
When IN4 is high, M1_CH4 is activated – ultimately being pulled to AGND as the ULN2003A inverts
the logic signal.