Datasheet

Detailed Description

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2 Detailed Description

The USB board is recognized as an HID-compliant device in Windows Device Manager. Successful

communication with the board by the application is confirmed by the Version: field at the bottom of the

application showing the correct USB firmware revision.

The I

C device address is fixed at 0x36 in this program. The sections on the left side are used to update

the registers of the device. The columns of registers on the right are updated by clicking the Readback All

button. When the program is first opened, the default values as shown above should be present. This will

indicate proper communication with the device.

• 1. Jumper J7 pins 2 to 3 for HWEN

• 2. Jumper J9 pins 1 to 2 for I2C address = 0x36

• 3. Jumpers on J5, J10, and J11 to complete LED power circuit

• 4. Arrange jumpers on HL1 and HL2 to select the number of LEDs in series (see diagram below)

• 5. Connect the LM3630 evaluation board to the USB2ANY interface

• 6. Connect USB2ANY interface board to computer USB port

• 7. Connect an external power supply to J1 and J2. 2.3V < Vin < 5.5V

• 8. Run LM3630.exe (Make sure USB2ANY.dll is in the same directory)

• 9. Check LED_A_EN and LED2_ON_A boxes. This will put both strings on control bank A

• 10. Uncheck the Sleep box

• 11. Move the slider under Brightness for Bank A to increase the current provided to the LEDs

The Interrupt Status Register will update every time the Readback All button is pressed. The status

performed and the Readback All button is pressed.

Access to any register is available through the Manual Control. Enter the address and data for a write or

address only for a read.

See the LM3630 data sheet for detailed descriptions of the registers and their usage.

NOTE: Do not change the configuration of the device while the backlight is enabled. First disable the

backlight by making sure LED_EN_A and/or LEN_EN_B is unchecked. Then adjust the configuration and

turn on the backlight. Changing the configuration while the backlight is on may produce unexpected

results.

NOTE: If the part is enabled to any level of brightness or state and the program is closed, the LM3630

device will remain in the last controlled state.

LM3630 EVM User Guide SNVU213A–March 2013–Revised April 2013

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