Texas Instruments SN65DSI8 Series, User'S Manual And Implementation Manual, Page: 6 / 17

Hardware Description
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6 SLLU221 – October 2016
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Copyright © 2016, Texas Instruments Incorporated
SN65DSI83, SN65DSI84, and SN65DSI85 EVM User’s Manual and
Implementation Guide
2.7 Reference CLK Programmability
The SN65DSI8X EVM incorporates a programmable CLK circuitry using a TI-programmable device,
CDCEL913. The output of the CDCEL913 is connected to the reference CLK of the SN65DSI8X. The
default frequency of the reference CLK is 27 MHz. The CLK can be programmed via I
2
C signals brought
out to on-board connectors J9, J12, or J10. When J10 is used, place jumpers on J9 and J12. The
reference CLK can be pre-programmed to a desired value, if requested prior to shipping.
2.8 DIP Switch Configuration
A DIP switch is provided to operate the device or EVM in different configurations. When the switch is in an
open position, the corresponding signal is tied high. When the switch is in the ON (closed) position, the
corresponding signal is tied to GND.
The signals in the greyed out region are not enabled unless a corresponding resistor is installed.
Table 2. DIP Switch Setting
DIP SW No Signal Name Description
Default Configuration
Open(Off)
HIGH
Closed(On)
LOW
SW2-1
DIP1 – Dimming CTRL or
LED_BKLT_EN
Controls LED backlight driver enable in default
configuration.
Installing R100 and uninstalling R63 enables
control on dimming control of the backlight
driver.
Always switch back to closed (ON) position
prior to unplug or plug operation of the panel.
x
SW2-2 I2C_3V3EN
Enables 3.3-V voltage translator for the I
2
C
signals
x
SW2-3 BRD_RSTN
Controls the EN/RESET signal of the
SN65DSI8X high or low
x
SW2-4 RSVD1 Reserved x
SW2-5 RSVD2 Reserved x
SW2-6 ADDR
Controls the ADDR signal of the SN65DSI8X
high or low
x
SW2-7 PWMIN Controls the PWMIN of J6 high or low x
SW2-8 LED_EN
Controls the LED_EN of J2 or J5 high or low
This switch should be toggled high to enable
the LED of the connected panel.
Always switch back to closed (ON) position
prior to unplug or plug operation of the panel.
x
3 Quick Start Guide
Quick-start instructions are provided in the following list:
1. Plug in a DSI source to J4
2. Plug in a LVDS video sink device on J2, J5 or J6
3. Plug in an I
2
C host on J10 if an external I
2
C host is used.
4. Make sure the DIP switch setting is in a correct configuration.
5. Apply power to the EVM. The following LEDs should light up: D3, D6, and D7. D1 may light up
depending on the configuration.
6. Start video streaming on the DSI input
7. Configure the device for the desired mode of operation via I
2
C. Video output should be observed after
configuration is complete.