Toradex Verdin - MIPI DSI Signals; Reference Schematics

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.