Phytec phyCORE-OMAP44 Series, Руководство по оборудованию

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Part II: PCM-959/phyCORE-OMAP44xx Carrier Board phyCORE-OMAP44xx
120 ©
PHYTEC Messtechnik GmbH
2012
L-760e_1
The next table shows the supplementary signals related to the camera interface (I
2
C, STROBE, SHUTTER, etc.)
which are also available at the expansion connector X5.
2.1.3.9.2 Secondary Camera Interface CSI2-B/CSI22 (X4)
The secondary camera interface (CSI2-B/CSI22 ) of the phyCORE-OMAP44xx is available at FFC connector X4
(Camera_2 interface of the phyCORE-OMAP44xx carrier board), which is compatible to PHYTEC's phyCAM-P
camera interface standard. It provides connectivity to an 8-bit parallel camera interface. The camera serializer
at U1 (SN65LVDS315RGER) converts the 8-bit parallel camera data to MIPI-CSI1 compliant serial data.
The serialized data is available on the differential serial data output DOUT which connects to the CSI2-B/CSI22
camera interface of the phyCORE-OMAP44xx.
The phyCAM-P camera interface provides also an I
2
C interface to control the image sensor of the camera module.
It connects to the I2C3 I
2
C bus of the phyCORE-OMAP44xx.
The supply voltage for the camera module ranges from 1.8 V to 3.3 V depending on the camera module attached
to the secondary camera interface. A step-down switching regulator at U29 adjusts the camera supply voltage
automatically according to the resistor connected to the camera module's "Power Voltage Set" output (input
CAM-2_VSET on camera connector X4). To attach the supply voltage to the Camera_2 interface circuitry jumper
JP1 must be closed.
Note:
Pins X1B5 to X1B8 on the phyCORE-Connector provide either signals of the keyboard interface, or camera
lanes 3 and 4 of the primary camera interface. The resistor array JN1 on the phyCORE-OMAP44xx allows to
choose which signals are brought out at these pins. In order to use lanes 3 and 4 of the primary camera
interface JN1 must be set to position 2. Please refer to
Figure 6 to see where JN1 is located.
Pin # Signal Name I/O SL Description
X5C10 CAM-1_SCL I/O VCC_CAM-1 Camera_1 I
2
C clock signal
1
1. To use the Camera_1 I
2
C interface JP6 must be closed to have VCC_CAM_1 available.
X5C11 CAM-1_SDA I/O VCC_CAM-1 Camera_1 I
2
C data signal1
X5C13 CAM-1_CTRL1 - - Camera_1 control signal 1
X5C14 CAM-1_CTRL2 - - Camera_1 control signal 2
X5C15 X_CAM_STROBE O VCC_1V8_IO Camera flash activation
trigger
X5C16 X_CAM_SHUTTER O VCC_1V8_IO Mechanical shutter control
signal
X5C17 X_CAM_GLOBAL_RESET I/O 1.8 V / VCC_1V8_IO Camera sensor reset
Table 56: CSI2-A/CSI21 Supplementary Signals at Expansion Connector X5
Note:
The function of camera control signals CAM-1_CTRL1 and CAM-1_CTRL2 depends on the camera board used.
Connector X2 allows to connect them either to GND, or VCC_CAM-1 (only available at X2 if jumper JP6 is closed)
or any other signal needed. Please refer to the hardware manual delivered with your camera board for precise
information on theses signals and their function.