STV-974/552S-R01 STMicroelectronics, STV-974/552S-R01 Datasheet - Page 21

• Manufacturer Part Number: STV-974/552S-R01
• Description: KIT DEMO W/VS6552
• Manufacturer: STMicroelectronics

Specifications of STV-974/552S-R01

• Sensor Type: CMOS Imaging, Color (RGB)
• Sensing Range: VGA
• Interface: I²C
• Sensitivity: 30 fps
• Embedded: No
• Utilized Ic / Part: STV0974E, VS6552
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 497-3891

4.5.3
Note: 1 16-bit values are in little-endian representation, i.e. LSB at lower address.
Note:
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Functional description
2 No data polling is required to access the microprocessor interface indirect registers.
Direct registers
Access to the microprocessor interface direct registers is controlled by the state of CSN, RDN,
WRN and RS (
Table 8: Microprocessor Interface Direct Registers
The direct registers are used to access all STV0974 indirect registers and external image sensor
registers through I²C. To read from a camera register:
1 Write AR with the indirect register address.
2 Poll the status register RDY bit until high.
3 Read the register data from DR.
To write to a camera register:
1 Write AR with the indirect register address.
2 Write DW with the register data.
3 Poll the status register RDY bit until high.
Address Register (AR)
The Address Register holds the 16-bit address of the camera register to access. AR is written by
two consecutive byte writes, least significant byte first.
To avoid LSB/MSB sequence mismatch, any read access (to DR or SR) guarantees that the
following write to AR updates the LSB (ADDR bits 7:0).
Table 9: Address Register
15
14
[13:0]
CSN
Bits
0
0
0
0
1
ME
RW
ADDR
Name
RDN
X
1
0
1
0
Table 8
WO
WO
WO
WRN
Type
X
0
1
0
1
).
0 = Image sensor register (forward command to I²C master).
1 =
0 = Write access
1 = Read access
Camera register address.
RS
X
0
0
1
1
STV0974
Address Register (AR)
Status Register (SR)
Data Write register (DW)
Data Read register (DR)
No access
register.
Description
Register accessed
STV0974