MT9T001P12STC Datasheet, PDF (17/41 Pages) Micron Technology – 1/2-Inch 3-Megapixel CMOS Digital Image Sensor

MT9T001 - 1/2-Inch 3-Megapixel Digital Image Sensor
Registers
Table 5: Register Descriptions (continued)
Register
Bit
Description
Read Mode 3
0x21
0
1
Row Address Mode
0x22
2:0
5:4
Global Reset—default = 0x0000—when set, snapshot mode makes use of the global reset—that
is, the entire array is released from reset simultaneously. Ineffective unless Snapshot (Reg0x1E[8])
is set.
Use GSHT_CTL—default = 0x0000.
When set, the leading edge of the GSHT_CTL pad signal is used to start the shutter sequence in
snapshot mode, and the trailing edge starts the read sequence. When clear, the leading edge of
the TRIGGER pad signal is used to initiate the shutter sequence, the trailing edge of GSHT_CTL
starts the exposure, and the trailing edge of the TRIGGER pad signal is used to start the strobe
and readout. Ineffective unless Snapshot (Reg0x1E[8]) and Global Reset are set.
Row Skip—the number of row-pairs to skip for every row read. For example, “0” means read
every row pair. “1” is skip 2x; 2 is skip 3x, etc. If Row Bin is non-zero, this should be set to the
interval between the first rows in each bin. For full binning, Row Skip equals Row Bin.
Row Bin—the number of rows to be read per row output minus one. For normal read out, this
should be “0.” For Bin 2x, it should be “1”; for Bin 3x, it should be “2.”
Column Address Mode
0x23
2:0 Column Skip—the number of column-pairs to skip for every pair read. Zero means read every
column. “1” means skip one pair for every pair read (Skip 2x); 2 means skip 2 pairs for every pair
read (Skip 3x) etc.
5:4 Column Bin—the number of columns to be addressed per column read out minus one. Zero
produces standard 1:1 read out. A value of “1” produces Bin 2x; “2” would be Bin 3x.
Note: Column start address value must be a multiple of Reg0x23 [5:4] + 1.
Green1 Gain
0x2B
6:0 Green1 analog gain—default = 0x08 (8) = 1x gain.
14:8 Green1 digital gain—default = 0x00 (0) = 1x gain.
Blue Gain
0x2C
6:0 Blue analog gain—default = 0x08 (8) = 1x gain.
14:8 Blue digital gain—default = 0x00 (0) = 1x gain.
Red Gain
0x2D
6:0 Red analog gain—default = 0x08 (8) = 1x gain.
14:8 Red digital gain—default = 0x00 (0) = 1x gain.
Green2 Gain
0x2E
6:0 Green2 analog gain—default = 0x08 (8) = 1x gain.
14:8 Green2 digital gain—default = 0x00 (0) = 1x gain.
Test Data
0x32
11:2 Test Data—the data inserted into the data path to produce test pattern when "Use Test Data"
(Reg0x07, bit 6) is set. Test Data will be inserted for even columns, and the inverse will be inserted
for odd columns.
Global Gain
0x35
Black Level
0x49
6:0 Global analog gain—default = 0x08 (8) = 1x gain.
14:8 Global digital gain—default = 0x00 (0) = 1x gain. This register can be used to set all four gains at
once. When read, it returns the value stored in Reg0x2B.
11:2 Desired black level in image.
81004bad/80ffb422
MT9T001_3100_DS_2.fm - Rev. D 7/05 EN
17
Micron Technology, Inc., reserves the right to change products or specifications without notice.
©2004 Micron Technology, Inc. All rights reserved.