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Preliminary ?
MT9V032: 1/3-Inch Wide-VGA Digital Image Sensor
Appendix A – Serial Configurations
Configuration of Sensor for Stereoscopic Serial Output with Internal PLL
In this configuration the internal PLL generates the shift-clk (x18) in phase with the
system-clock. The LVDS pins SER_DATAOUT_P and SER_DATAOUT_N must be
connected to a deserializer (clocked at approximately the same system clock frequency).
Figure 7 shows how a standard off-the-shelf deserializer can be used to retrieve back
D OUT (9:2) for both the master and slave sensors. Additional logic is required to extract
out LINE_VALID and FRAME_VALID embedded within the pixel data stream.
Figure 7:
Stereoscopic Topology
S LAVE
MA S TER
2 6 . 6 MHz
Os c .
LVD S
S ER_DATAIN
LVD S
LVD S
BYPA SS _ C LKIN
S
S EN S OR
X 1 8/X 1 2 PL L
S ER_DATAIN
LVD S
BYPA SS _ C LKIN
S EN S OR
LVD S
S ER_DATAOUT
LVD S
S HIFT_ C LKOUT
LVD S
S ER_DATAOUT
LVD S
S HIFT_ C LKOUT
5 meters (maximum)
1. PLL in non- b ypass mo d e
2. PLL in x 18 mo d e (stereos c opy)
1. PLL in b ypass mo d e
D S 92LV1 6
8
PIXEL
FROM
S LAVE
8
PIXEL
FROM
MA S TER
2 6 . 6 MHz
Os c .
LV an d FV are em b e dd e d in the d ata stream
Typical configuration of the master and slave sensors:
1. Power up the sensors.
2. Broadcast WRITE to de-assert LVDS power-down (set R0xB1[1] = 0).
3. Individual WRITE to master sensor putting its internal PLL into bypass mode (set
R0xB1[0] = 1).
4. Broadcast WRITE to both sensors to set the stereoscopy bit (set R0x07[5] = 1).
5. Make sure all resolution, vertical blanking, horizontal blanking, window size, and
AEC/AGC configurations are done through broadcast WRITE to maintain lockstep.
6. Broadcast WRITE to enable LVDS driver (set R0xB3[4] = 0).
7. Broadcast WRITE to enable LVDS receiver (set R0xB2[4] = 0).
8. Individual WRITE to master sensor, putting its internal PLL into bypass mode (set
R0xB1[0] = 1).
9. Individual WRITE to slave sensor, enabling its internal PLL (set R0xB1[0] = 0).
10. Individual WRITE to slave sensor, setting it as a stereo slave (set R0x07[6] = 1).
11. Individual WRITEs to master sensor to minimize the inter-sensor skew (set
R0xB2[2:0], R0xB3[2:0], and R0xB4[1:0] appropriately). Use R0xB7 and R0xB8 to get
lockstep feedback from stereo_error_flag.
12. Broadcast WRITE to issue a soft reset (set R0x0C[0] = 1 followed by R0x0C[0] = 0).
Note:
The stereo_error_flag is set if a mismatch has occurred at a reserved byte (slave and
master sensor’s codes at this reserved byte must match). If the flag is set, steps 11 and
12 are repeated until the stereo_error_flag remains cleared.
PDF: 09005aef824c9998/Source: 09005aef824c999c
MT9V032_LDS_2.fm - Rev. B 3/07 EN
11
Micron Technology, Inc., reserves the right to change products or specifications without notice.
?2006 Micron Technology, Inc. All rights reserved.
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