3.4.10 MIPI CSI/DSI Interface

The SAM9X75-Curiosity board embeds a 4-lane MIPI D-PHY for interfacing with CSI compatible cameras and DSI compatible displays.

The board features a 22-pin FPC/FFC connector (J29) with 0.5 mm pitch, similar to the one used for the Raspberry Pi Compute Module boards. 4-lane MIPI cameras can connect to the board directly, while 2-lane cameras and displays provided by Raspberry Pi(1) require a 22-pin to 15-pin FPC adapter. For 4-lane MIPI displays, an adapter is necessary due to various non-standard connector pinout across different manufacturers. Additional GPIOs and TWI interface are provided for camera/display control.

Note:
  1. Raspberry Pi is a trademark of Raspberry Pi Trading.

The following figure shows the MIPI CSI camera interface.

Figure 3-34. MIPI CSI Camera Interface
A diagram of a computer Description automatically generated

The following table shows the MIPI CSI/DSI interface signal description.

Table 3-19. MIPI CSI/DSI Interface Signal Description
Pin No. PIO Signal Name Signal Description
1, 4, 7, 10, 13, 16, 19 – GND Ground
2 – MIPI_D0_N MIPI D-PHY negative differential input data 0
3 – MIPI_D0_P MIPI D-PHY positive differential input data 0
5 – MIPI_D1_N MIPI D-PHY negative differential input data 1
6 – MIPI_D1_P MIPI D-PHY positive differential input data 1
8 – MIPI_CK_N MIPI D-PHY negative differential input clock
9 – MIPI_CK_P MIPI D-PHY positive differential input clock
11 – MIPI_D2_N MIPI D-PHY negative differential input data 2
12 – MIPI_D2_P MIPI D-PHY positive differential input data 2
14 – MIPI_D3_N MIPI D-PHY negative differential input data 3
15 – MIPI_D3_P MIPI D-PHY positive differential input data 3
17 PC19 MIPI_CSI_GPIO0 General Purpose I/O
18 PC15 MIPI_CSI_GPIO1 General Purpose I/O
20 PA25 CAM_I²C_CLK_ TWI Clock
21 PA24 CAM_I²C_DATA TWI Data
22 – VDD_3V3 or 5V_MAIN 3.3V or 5V