MT9M114_16 Datasheet, PDF (15/62 Pages) ON Semiconductor – High-Definition (HD) System-On- A-Chip (SOC) Digital Image Sensor

Serial Port
MT9M114: 1/6-Inch 720p High-Definition (HD) System-On-A-Chip (SOC) Dig-
ital Image Sensor
This section describes how frames of pixel data are represented on the high-speed
MIPIserial interface. The MIPI output transmitter implements a serial differential sub-
LVDS transmitter capable of up to 768 Mb/s. It supports multiple formats, error
checking, and custom short packets. MT9M114 is designed to MIPI D-PHY version v1.0.
When the sensor is in the software standby system state, the MIPI signals (CLK_P,
CLK_N, DATA_P, DATA_N) indicate ultra lowpower state (ULPS) corresponding to
(nominal) 0V levels being driven on CLK_P, CLK_N, DATA_P, and DATA_N. This is equiv-
alent to signaling code LP-00. When the sensor enters the streaming system state, the
interface goes through the following transitions:
1. After the PLL has locked and the bias generator for the MIPI drivers has stabilized, the
MIPI interface transitions from the ULPS state to the ULPS-exit state (signaling code
LP–10).
2. After a delay (TWAKEUP), the MIPI interface transitions from the ULPS-exit state to
the TX-stop state (signaling code LP–11).
3. After a short period of time (the programmed integration time plus a fixed overhead),
frames of pixel data start to be transmitted on the MIPI interface. Each frame of pixel-
data is transmitted as a number of high-speed packets. The transition from the
TX-stop state to the high-speed signaling states occurs in accordance with the MIPI
specifications. Between high-speed packets and between frames, the MIPI interface
idles in the TX-stop state. The transition from the high-speed signaling states and the
TX-stop state takes place in accordance with the MIPI specifications.
4. If the sensor is reset, any frame in progress is aborted immediately and the MIPI sig-
nals switch to indicate the ULPS.
5. If the sensor is taken out of the streaming system state and reset_register[4] = 1
(standby end-of-frame), any frame in progress is completed and the MIPI signals
switch to indicate the ULPS.
If the sensor is taken out of the streaming system state and reset_register[4] = 0 (standby
end-of-frame), any frame in progress is aborted as follows:
1. Any long packet in transmission is completed.
2. The end of frame short packet is transmitted.
After the frame has been aborted, the MIPI signals switch to indicate the ULPS.
MT9M114/D Rev. 11, 2/16 EN
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