MT9P001 Datasheet, PDF (20/48 Pages) ON Semiconductor – CMOS Digital Image Sensor

MT9P001: 1/2.5-Inch 5Mp Digital Image Sensor
Features
Features
Reset
The MT9P001 may be reset by using RESET_BAR (active LOW) or the reset register.
Hard Reset
Assert (LOW) RESET_BAR, it is not necessary to clock the device. All registers return to
the factory defaults. When the pin is negated (HIGH), the chip resumes normal opera-
tion.
Soft Reset
Set the Reset register field to “1” (R0x0D[0] = 1). All registers except the following will be
reset:
• Chip_Enable
• Synchronize_Changes
• Reset
• Use_PLL
• Power_PLL
• PLL_m_Factor
• PLL_n_Divider
• PLL_p1_Divider
When the field is returned to “0,” the chip resumes normal operation.
Power Up and Power Down
When first powering on the MT9P001, follow this sequence:
1. Ensure RESET_BAR is asserted (LOW).
2. Bring up the supplies. If both the analog and the digital supplies cannot be brought
up simultaneously, ensure the digital supply comes up first.
3. Negate RESET_BAR (HIGH) to bring up the sensor.
When powering down, be sure to follow this sequence to ensure that I/Os do not load
any buses that they are connected to.
1. Assert RESET_BAR.
2. Remove the supplies.
Clocks
The MT9P001 requires one clock (EXTCLK), which is nominally 96 MHz. By default, this
results in pixels being output on the DOUT pins at a maximum data rate of 96 Mp/s. With
VDD_IO = 1.8V, maximum master clock and maximum data rate become 48 MHz and
48 Mp/s, respectively. The EXTCLK clock can be divided down internally by setting
Divide_Pixel_Clock to a non-zero value. This slows down the operation of the chip as
though EXTCLK had been divided externally.
f_{PIXCLK= {}
f_EXTCLK
f_{EXTCLK / (2 × Divide_Pixel_Clock)}
if Divide_Pixel_Clock = 0
otherwise
MT9P001_DS Rev. L 4/15 EN
20
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