mt9v112 Micron Semiconductor Products, mt9v112 Datasheet - Page 45

• Manufacturer Part Number: mt9v112
• Description: 1/6-inch Soc Vga Cmos Digital Image Sensor
• Manufacturer: Micron Semiconductor Products

Turning Frame Rates
sensor parameters. The sensor registers are in address
page 0, some of which are shown in Table 13.
Default Blanking Calculations
shown in Table 14.
T able 14: Blanking Parameter Calculations
pixels all the way around the image, taking the active
image size to 648 x 488 in full power mode. This is
achieved through the default settings:
• oversize and show border bits are set by default
• oversize and show border bits are not context
User Blanking Calculations
minimum values for horizontal blanking and vertical
blanking must be taken into account. Table 15 shows
minimum values for each register.
09005aef8154a39d/09005aef8175e6cc
MT9V112_2.fm- Rev. A 1/05 EN
PARAMETER
PC_PERIOD Sensor Pixel Clock Period
A: Active Data Time (per line): R0 x 04:0 + 8 (border) * PC_PERIOD
Q: Horizontal Blanking: [R0 x 05:0 | R0 x 07:0] * PC_PERIOD
Row Time = Q + A
P: Frame Start / End Blanking: 6 * PC_PERIOD
V: Vertical Blanking: [R0 x 06:0 | R0 x 08:0] * (Q + A) + (Q - 2 * P)
F: Total Frame Time: (R0 x 03:0 + [R0 x 06:0 | R00 x 08:0]) * (Q + A)
A ctual frame rates can be tuned by adjusting various
The MT9V 112 default blanking calculations are
In the MT9V112, the sensor core adds four border
switchable, and therefore, their location is only in
read mode context B.
When calculating blanking for different clock rates,
45
SOC VGA DIGITAL IMAGE SENSOR
T able 13: Register Address Functions
T able 15: User Blanking Minimum
REGISTER
R0x04:0
R0x03:0
R0x07:0, R0x05:0
R0x08:0, R0x06:0
PARAMETER
Horizontal Blanking 132 (sensor pixel clocks)
Vertical Blanking
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CALCULATION
(2/24)µs = 0.083µs
648 x (2/24) = 53.784µs
154 x (2/24) = 12.782µs
66.566µs
6 x (2/24) = 0.5µs
(11 x 66.566) + (12.782 - 1.0) = 744µs
(488 + 11) x 66.566µs = 33216.434µs t30 fps
Values
FUNCTION
MT9V112
MT9V112
(units of sensor pixel clocks)
Vertical blanking, default is 11
(rows including black rows)
Column width, typically 640 in the
Row width, typically 480 in the
Horizontal blanking, default is 203
MINIMUM
6 + Reg0x22:0[2:0] rows
©2004 Micron Technology, Inc. All rights reserved.
PRELIMINARY
MT9V112