BU6566GVW_09 ROHM [Rohm], BU6566GVW_09 Datasheet - Page 11

• Manufacturer Part Number: BU6566GVW_09
• Description: Camera Image Processors Compatible with JPEG Image
• Manufacturer: ROHM [Rohm]

2.
2.1. System clock and camera clock
External input clock (XIN) may be divided set and supplied as CAMCKO clock to camera module.
The relation of data synchronization clock CAMCKI clock from camera and system clock SCLK must be set so as to meet the
following formula.
2.2. Camera module interface timing
The timing of the camera image signal in camera I/F is shown in Table 2.2-1.
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BU6566GVW, BU6568GV
tCMS
tCMH
Symbol
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Camera Module Interface Timing
fSCLK  2
The clock relation in fSCLK = fCAMCKO = 2
CAMCKI rising/falling camera set up time
CAMCKI rising/falling camera hold time
CAMVS
CAMHS
CAMD0
CAMCKI
CAMCKI
－CAMD7
(CKPL=“0”)
(CKPOL=“1”)
internal SCLK
[fSCLK=fCAMCKO=2
CAMCKO
CAMCKI
fSCLK
fCAMCKI
Moreover, [Camera timing 1] or [Camera timing 2] shown below must be satisfied.
[Camera timing１] (In the case when CAMCKI signal is as asynchronous as CAMCKO)
tCAMCKIH > tSCLK + 1ns and tCAMCKIL > tSCLK + 1ns
[Camera timing 2] (In the case when CAMCKI signal is as synchronous as CAMCKO)
total delay + margin ( 10ns) < tSCLK
×
fCAMCKI
Figure .2.1-1 Relation between system clock and camera clock
tCAMCKIH
tCAMCKIL
total delay
Table 2.2-1 BU6566GVW/BU6568GV timing (camera data)
Details
total delay
BU6566GVW
/BU6568GV
System clock frequency
Camera clock frequency input to CAMCKI terminal
×
fCAMCKI]
delay from CAMCKO change point to CAMCKI change point
CAMCKI = "H"
total
delay
CAMCKO
×
CAMCKI
detect
fCAMCKI is shown in Figure.2.1-1.
11/16
CAMCKI High interval
CAMCKI Low interval
tCMS
MIN.
CAMERA
1/5
1/5
Module
CAMCKI = "L"
detect
TYP.
-
-
……(2.1-1)
……(2.1-2)
……(2.1-3)
MAX.
-
-
tCMH
Unit
ns
ns
BU6566GVW/BU6568GV
BU6566GVW/BU6568GV
Technical Note
2009.04 - Rev.B
Remarks