MT9D115 Datasheet, PDF (52/66 Pages) ON Semiconductor – CMOS Digital Image Sensor

MT9D115: 1/5-Inch SOC Digital Image Sensor
Other Features
GPIO and Output Enable Controls
General Purpose I/Os
The four GPIOs of the MT9D115 can be configured in multiple ways. Each of the I/Os
can be used as a simple input/output that can be programmed from the host. The status
of the GPIO is read at power up and can be used as a module ID to identify different
module suppliers. In addition, module ID can be stored in the OTP memory of the
sensor. Information on the OTP memory can be found in “One-time Programmable
Memory (OTPM)” on page 51.
If 10-bit RAW output is required, GPIO[1:0] can be configured as bit 1 and bit 0 (the LSBs)
of a 10-bit data bus.
GPIO[2] can be configured to output a flash pulse to trigger an external xenon or LED
flash or a shutter pulse to control an external shutter.
GPIO[3] can also be configured as an input to be used as an OE_BAR signal for the data
bus.
The general purpose inputs are enabled or disabled through register settings. Once
enabled, all four inputs must be driven to valid logic levels by external signals. The state
of the general purpose inputs can be read from a register.
Output Enable Control
When the parallel pixel data interface is enabled, its signals can be switched asynchro-
nously between being driven and High-Z under signal or register control.
MT9D115 DS Rev. E Pub. 4/15 EN
52
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