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MT9V115W00STCK22EC1-750 Datasheet(PDF) 11 Page - ON Semiconductor |
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MT9V115W00STCK22EC1-750 Datasheet(HTML) 11 Page - ON Semiconductor |
11 / 51 page MT9V115 DS Rev. E Pub. 5/15 EN 11 ©Semiconductor Components Industries, LLC, 2015. MT9V115: 1/13-Inch VGA SOC Digital Image Sensor Functional Description Power-On Reset The MT9V115 includes a power-on reset feature that initiates a reset upon power-up. A soft reset is issued by writing commands through the two-wire serial interface. Two types of reset are available: • A soft reset is issued by writing commands (SYSCTL R0x001A[0] = 1)through the two- wire serial interface register 0x1A bit[4:6] during normal operation. •An internal power-on reset The output states after hard reset are shown in Table 5 on page 11. A soft reset sequence to the sensor has the same effect as the hard reset and can be acti- vated by writing to a register through the two-wire serial interface. On-chip power- onreset circuitry can generate an internal reset signal in case an external reset is not provided. The RESET_BAR signal has an internal pull-up resistor and can be left floating. Standby The MT9V115 supports two different standby modes: 1. Hard standby mode 2. Soft standby mode The hard standby mode is invoked by asserting the STANDBY pin. It then disables all of the digital logic within the image sensor, and only supports being awoken by de- asserting the STANDBY pin. The soft standby mode is enabled by a single register access, which then disables the sensor core and most of the digital logic. However, the serial interface is kept alive, which allows the image sensor to be awoken via a serial register access. All output signal status during standby are shown in Table 5. Hard Standby Mode The MT9V115 can enter hard standby mode by using external STANDBY signal, as shown in Figure 3. The two-wire serial interface and IFP block shut down even when EXTCLK is running during hard standby mode. Table 5: Status of Output Signals During Reset and Standby Signal Reset Post-Reset Standby DOUT[7:0] High-Z High-Z High-Z PIXCLK High-Z High-Z High-Z LV High-Z High-Z High-Z FV High-Z High-Z High-Z CLK_N High-Z 0 0 CLK_P High-Z 0 0 DATA_N High-Z 0 0 DATA_P High-Z 0 0 |
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