Table 1-1. DLP3021LEQ1 EVM Operating Mode Switch Positions
Operating Mode
DLP3021LEQ1EVM
SPI Adapter Board
LED State
S1-A
S1-B
S1
S2
Host Mute
Off
On
Off
On
Blue=ON,
Amber=OFF,
Green=ON
Local Host Control
Off
Off
Off
Off
Blue=OFF,
Amber=OFF,
Green=ON
FPGA Programming
On
On
On
On
Blue=ON,
Amber=ON,
Green=ON
Undefined
On
Off
On
Off
Blue=OFF,
Amber=ON,
Green=OFF
A brief description of each operating mode is provided as follows:
Host Mute:
This mode allows direct read/writes to the DMD controller parameters. This is the
recommended operation mode of the EVM for initial development and debug purposes.
The FTDI cable and SPI Adapter board are required to run the EVM in this mode and
bypass the MSP430G2553-Q1 MCU on-board host controller. The DLP Control Program is
the GUI used to configure the DMD control parameters in this mode.
Local Host
Control:
This mode allows the MSP430G2553-Q1 MCU on-board host controller to locally read/
write to the DMD controller. No additional hardware or GUI is required to run the EVM in
this mode because command execution by the MCU automatically starts after the EVM is
powered-up. This mode is recommended for demonstration purposes or system testing to
emulate the end-product module. The SPI Adapter board and FTDI cable are not required
for this operation mode.
FPGA
Programming:
This mode allows the DMD controller to be reprogrammed using the DLP Composer GUI.
The FTDI cable and SPI Adapter board are required to run the EVM in this mode because
the flash program binary is uploaded from the PC to EVM through the FTDI cable. The light
engine will be disabled so that no content is displayed while the EVM is in this mode. See
for details on Flash Programming.
Undefined:
This mode is unsupported by the EVM and should not be used.
To allow the SPI Adapter board to set the operating mode, TI recommends the DLP3021LEQ1EVM electronics
board S1 switches always be set to
Local Host Control
mode. This is because the On-state of either board will
always override the Off-state of the other board. This setup will enable the use the more easily accessible S1
and S2 toggle switches of the SPI Adapter board to set the operating modes. When the SPI Adapter board is
detached, the EVM will automatically start-up in the Local Host Control mode to allow the MSP430 to configure
and run the EVM without intervention from an external controller such as the FTDI cable. When switching
between operating modes, TI recommends that the EVM be fully power cycled to reset and apply the most
recently set operating mode.
1.2.2 Illumination Subsystem
The illumination subsystem includes the LED driver circuit and RGB LEDs. The FPGA has three PWM outputs
which typically correspond to red, green, and blue illumination colors. The PWM duty cycles can be adjusted to
set a reference voltage to an external illumination driver circuit as needed to balance colors and adjust output
brightness. Typical illumination configurations for the DLP3021Q1EVM:
• Optimal Color: PWM=450 with duty cycles of Red=30%, Green=45%, Blue=25%
• High Brightness: PWM=450 with duty cycles of Red=24.9%, Green=62.4%, Blue=12.7%
DLP3021-Q1 Electronics EVM Overview
6
DLP3021LEQ1EVM Evaluation Module
DLPU106A – MARCH 2021 – REVISED OCTOBER 2021
Copyright © 2021 Texas Instruments Incorporated