Specifications

84 Issue Date: 2004/11/05 │ CONFIDENTIAL
CL765 │ Camera Application Processor
Datasheet │ Doc. #: CLQP-DS-743
4.14.1.3. Registers Related to Sensor Interface
a) Device ID (0x22)
Sensor Device ID is decided by CIS_Type pin. In short, if CIS_TYPE[2:0] is
[000], the sensor device ID is Omnivision CMOS VGA sensor and the value
is 7bit Hex value 0x21(7bit data). Like this, [001] is set to Hynix CMOS
VGA(0x11), [010] is set to SONY CMOS VGA(0x1f), and [011] is set to
SANYO CCD VGA(0x3C). Therefore, to use the sensor different from the
above value, the value should be set to [110] or [111]. If CIS_TYPE is set to
User Select Mode, the CL765 decides the device ID by referring to 0X22
register.
For example, in case of HYNIX HV7131GP, 7bit Device ID is 0x11. When
changing this value into the binary number, the binary number is 001_0001.
And the number is 1001_0001(0x91) by adding up the highest 1Bit Enable bit.
But the initial value is 0xA0 when the value of 0x22 has not set yet.
b) Input Pixel Ratio (0x23)
This is the ratio of data rate (PCLK) from the sensor and the clock (a clock
provided to M_CLK Pin) that runs in the CL765.
0x23 register value = (M_CLK/PCLK – 1) (However, only 0/1/2/3 is valid.)
c) CIS Input Clock Control (0x25)
- Bit[1:0] : This is the ratio of C_MCLK provided to the sensor and M_CLK.
C_MCLK is a clock provided from the CL765 to the sensor and
this is the important factor to decide the frame rate of the sensor.
Therefore, the spec of the sensor should be referred to decide this
value.
C_MCLK Frequency = M_CLK / 2
{0x25 Bit[1:0] – 1}
(However, only 1/2/3 is valid)
- Bit[3:2]
Figure 4-32. Sensor Data Sampling
* The polarity of C_HS / C_VS can be varied depending on the sensor.