Toradex Verdin, Manual

Page: 36 / 111

Verdin Carrier Board Design Guide
Preliminary
– Subject to Change
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2.6.1
MIPI DSI Signals
Verdin
Pin Verdin
Signal Name
I/O Type
Power
Rail
Description
37 DSI_1_CLK_P O D-PHY MIPI DSI differential clock positive
35 DSI_1_CLK_N O D-PHY MIPI DSI differential clock negative
49 DSI_1_D0_P I/O D-PHY MIPI DSI differential data lane 0, positive
47 DSI_1_D0_N I/O D-PHY MIPI DSI differential data lane 0, negative
43 DSI_1_D1_P O D-PHY MIPI DSI differential data lane 1, positive
41 DSI_1_D1_N O D-PHY MIPI DSI differential data lane 1, negative
31 DSI_1_D2_P O D-PHY MIPI DSI differential data lane 2, positive
29 DSI_1_D2_N O D-PHY MIPI DSI differential data lane 2, negative
25 DSI_1_D3_P O D-PHY MIPI DSI differential data lane 3, positive
23 DSI_1_D3_N O D-PHY MIPI DSI differential data lane 3, negative
55 I2C_2_DSI_SCL O OD 1.8V
I
2
C interface, intended to be used as DDC
53 I2C_2_DSI_SDA I/O OD 1.8V
19 PWM_3_DSI I/O CMOS 1.8V
Dedicated PWM output for the display backlight brightness control,
could also be used as general-purpose IO
17 GPIO_9_DSI I/O CMOS 1.8V Dedicated general-purpose IO for DSI bridges
21 GPIO_10_DSI I/O CMOS 1.8V Dedicated general-purpose IO for DSI bridges
Table 14: MIPI DSI signals
Additional to the high-speed MIPI DSI signals, the Verdin reserves also pins for a dedicated I
2
C, a
PWM, and two GPIOs for the DSI interface. These signals are intended to be used for controlling
an attached display as well as DSI bridges. Some DSI bridges can embed also sound in the
interface (e.g. HDMI). The I2S_2 interface is recommended to be used in combination with the DSI
interface. The following table shows how the additional signals are recommended to be used for
the different use cases. Whenever possible, follow these recommendations in order to be software
compatible with the reference designs.
Verdin
Pin Verdin
Signal Name
MIPI DSI Display DSI to HDMI Bridge DSI to LVDS Bridge DSI to RGB Bridge
55 I2C_2_DSI_SCL Reserved HDMI DDC Reserved Reserved
53 I2C_2_DSI_SDA Reserved HDMI DDC Reserved Reserved
19 PWM_3_DSI Display Brightness HDMI HPD Display Brightness Display Brightness
17 GPIO_9_DSI Reserved Bridge Interrupt
Bridge Interrupt
Touch Interrupt Bridge Interrupt
Touch Interrupt
21 GPIO_10_DSI Reserved Bridge Reset Bridge Reset Bridge Reset
48 I2S_2_D_IN Reserved Reserved Reserved Reserved
46 I2S_2_D_OUT
Display Backlight
Enable
HDMI Audio
Display Backlight
Enable Display Backlight
Enable
44 I2S_2_SYNC Reserved HDMI Audio Reserved Reserved
42 I2S_2_BCLK Touch Reset HDMI Audio Touch Reset Touch Reset
Table 15: Recommended Usage of DSI Control Signals
2.6.2
Reference Schematics
Besides attaching a display directly to the MIPI DSI interface, there are many display adapters
available. The following display adapters are also available as add-on boards for the Verdin
reference designs. Therefore, bridges used on these adapters are supported by the regular BSP for
the Verdin modules.