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參數(shù)資料
| 型號： | OV7620 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | OV7620 SINGLE-CHIP CMOS VGA COLOR DIGITAL CAMERA |
| 中文描述： | OV7620的單芯片CMOS VGA彩色數(shù)碼相機 |
| 文件頁數(shù)： | 25/60頁 |
| 文件大小： | 313K |
| 代理商： | OV7620 |
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OV7620 Product Specifications - Rev. 1.2 (5/13/00)
OMNIVISION TECHNOLOGIES INC.
25
Preliminary
Company Confidential
1.12 SCCB BUS
SCCB access is enabled only if pin
SBB
=0. OV7620 is a slave device that supports 400kbit/s 7bit
address data transfer protocol. Within each byte, MSB is always transferred first, read/write con-
trol bit is the LSB of the first byte
The protocol requires
SIO-0
must be stable during the HIGH period of the
SIO-1
. Each data bit can
only change state when is
SIO-1
LOW.
OV7620 reserves
CS(2:0)
for the slave ID, which makes eight slave camera combinations.
OV7620 SCCB supports multi-byte write and multi-byte read. In a write cycle, the master must
supply the subaddress, however, the master does not supply the subaddress in the read cycle,
therefore, OV7620 takes the read subaddress from the previous write cycle. In multi-byte write
or multi-byte read cycles, the subaddress is auto increment after the first data byte so that con-
tinuous locations can be accessed in one bus cycle. Since a multi-byte cycle overwrites its orig-
inal subaddress, if a read cycle follows immediately to a multi-byte cycle, it is necessary to insert
a single byte write cycle that provides a new subaddress.
If OV7620 support 400 kBit/s fast SCCB mode, system clock (CLK) must be at least 10 Mhz.
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