ov7620 OmniVision Technologies, Inc, ov7620 Datasheet - Page 33

• Manufacturer Part Number: ov7620
• Description: Single-chip Cmos Vga Color Digital Camera
• Manufacturer: OmniVision Technologies, Inc

OV7620/OV7120 Product Specifications - Rev. 1.2 (7/10/01)
Register 14- rw: Common control C
Register 15- rw: Common control D
Register 16 - rw: Frame Drop
Bits
Default
Bits
Default
Bits
Default
COMC7 - AWB activation threshold selection: 1- high; 0-low.
COMC6 - Reserved.
COMC5 - QVGA digital output format selection. 1 - 320x240; 0 - 640x480.
COMC4 - Field/Frame vertical sync output in VSYNC port selection: 1 - frame sync, only inserted in ODD
COMC3 - HREF polarity selection: 0 - HREF positive effective, 1 - HREF negative.
COMC2 - RGB gamma selection: 1 - Gamma on, value defined by register [62] value; 0 - gamma is 1 (lin-
COMC1 - Reserved.
COMC0 - Reserved.
COMD7 - Reserved.
COMD6 - PCLK polarity selection. “0” OV7620/OV7120 output data at PCLK falling edge and data bus will
COMD<5:1> - Reserved.
COMD0 - U V digital output sequence exchange control. 0 - V U V U ... for 16Bit, V Y U Y ... for 8 Bit; 1- U
FD<7:2>- Frame drop selection, it operates in ODD and EVEN mode as defined by FD<1:0>, it is ignored
COMC7
COMD7
000000 - 000001: disable digital data output, only output black reference level.
000010 - 111111: Output 1 of (2 ~ 63) frame. If set register 33 bit 1= 1, that means
only drop 1 frame from (2 ~ 63) frame.
FD7
0
0
-
field vertical sync; 0 - field vertical sync, effect in Interlaced mode
ear).
be stable at PCLK rising edge; “1” rising edge output data and stable at PCLK falling edge.
When OV7620/OV7120 work as CCIR656 format, COMB4=1, this bit is disable and should
use PCLK rising edge latch data bus.
V U V ... for 16Bit and U Y V Y ... for 8 Bit.
in OFF & FRAME mode. Its purpose is to divide the video signal into programmed number of
time slots in unit of field/frame, and to allow HREF to be active only one field/frame during the
period. This function does not affect the video data or pixel rate.
COMC6
COMD6
FD6
0
0
-
COMC5
COMD5
FD5
0
0
-
COMC4
COMD4
FD4
0
0
-
Preliminary
COMC3
COMD3
FD3
0
0
-
COMC2
COMD2
FD2
1
0
-
Company Confidential
OMNIVISION TECHNOLOGIES INC.
COMC1
COMD1
FD1
1
-
-
COMC0
COMD0
FD0
1
1
-