Texas Instruments OMAP36 Series, Техническое справочное руководство

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camisp-022
CAM.TCTRL_CTRL[4:0]
DIVA
CSI2_96M_FCLK CAM_L4_ICLK
CAM_MCLK
cam_pclk
Divider
1,...,30
CAM.TCTRL_CTRL[9:5]
DIVB
cam_xclka
cam_xclkb
CSI2_96M_FCLK CAM_ICLK cam_pclk
Divider
1,...,30
CM_FCLKEN_CAM[1]
EN_CSI2
CAM_L3_ICLK
CAM_FCLK
CM_ICLKEN_CAM[0]
EN_CAM
CM_ICLKEN_CAM[0]
EN_CAM
CM_FCLKEN_CAM[0]
EN_CAM
Camera ISP
Public Version
Camera ISP Integration
www.ti.com
• CSI2 Serial interface clock domain
• CSI2 byte clock domain, whitch frequency depends on the image sensor type and size, its frame rate
and its blanking period. The clock is generated from the bit-clock from the sensor and converted into
byte clock.
• Parallel interface clock domain. This frequency depends on the imaging sensor type and size, its frame
rate and its blanking time. The functional clock is required to be at least 2x faster than the pixel clock
when the bridge is disabled and a least equal when it is enabled.
• Slave interface clock domain, from L4 interconnect
6.3.1.1.1 Camera ISP Clock Tree
Figure 6-51 shows the clock tree for the camera ISP module.
Figure 6-51. Camera ISP Clock Tree Diagram
6.3.1.1.2 Camera ISP Clock Descriptions
Table 6-12 describes the camera ISP clocks.
Table 6-12. Camera ISP Clock Descriptions
Signal Name IO Description
CAM_FCLK Input Functional clock (L3 interconnect clock domain) Functional clock
domain.
CAM_ICLK Input Interface clock (L4 interconnect clock domain) Interface clock
domain.
CAM_MCLK
(1)
Input Internal clock from PRCM at 216 MHz. The CAM_MCLK is used by
the clock generator to generate cam_xclka and cam_xclkb. It is also
used by the control Signal generator to generate cam_shutter,
cam_strobe, and cam_global_reset. For more information, see
Section 6.4.4 , Camera ISP Timing Control.
cam_xclka Output External clock for the image-sensor module. For serial or parallel
sensor.
(1)
The CAM_MCLK frequency can be less than, or equal to 216 MHz.
1140Camera Image Signal Processor SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated