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参数资料
| 型号： | CS7654-KQ |
| 厂商： | CIRRUS LOGIC INC |
| 元件分类： | 消费家电 |
| 英文描述： | CCD COLOR SPACE PROCESSOR WITH ANALOG OUTPUT |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封装： | 10 X 10 X 1.40 MM, TQFP-64 |
| 文件页数： | 26/62页 |
| 文件大小： | 1028K |
| 代理商： | CS7654-KQ |
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CS7654
26
Address Set Operation
The ADDRESS SET format consists of a two-byte
packet which sets the address of a subsequent
READ operation. The first byte of the Station Ad-
dress with the LSB (data direction bit) set LOW to
indicate a write operation. The second byte is the
register address (0..255). The ADDRESS SET for-
mat is the same as the WRITE format, without the
register data (third byte).
Read Operations in Three-Byte Mode
The READ operation may consist of two or more
bytes. The first byte is the station address with the
LSB (data direction bit) set HIGH indicating a read
operation. The addressed device then sends one or
more bytes back from the register last addressed by
the previous WRITE operation or the previous AD-
DRESS SET operation.
Operating CS7654 in Four-Byte I
2
C Config-
uration
In this configuration the external controller talks
only to the CS7654 through the primary I
2
C inter-
face. All the other slave devices on the camera
board are tied to the secondary I
2
C port of the
CS7654. WRITE and READ packets only are de-
fined in four-byte mode. Independent address set
operations to slave devices on the secondary I
2
C
bus is not allowed in four-byte mode. Four-byte
mode is active when the P4BYTMODE pin (pin
46) is logic high.
Write Operations in Four-Byte mode
All WRITE operations from an external controller,
through the CS7654, to any slave device must use
the four-byte mode; this includes writing to the
CS7654 itself. The external controller sends a four-
byte WRITE command to the CS7654 which ini-
tiates a WRITE operation to the destination slave
device and sets the I2CBUSY bit in the status reg-
ister ( 01h at SA 0x34h ). The I2CBUSY bit is
cleared when the write operation on the secondary
bus is complete. The External controller can poll
the status register to check if the CS7654 has com-
pleted the command.
The CS7654 has a one-command-buffer which al-
lows the external controller to queue one additional
command while the current command is still being
executed. If more than one command is sent before
the I2CBUSY bit is cleared, the CS7654 saves only
the last command and executes it after the current
one is completed. Commands that involve writing
Byte Sequence
First Byte
Second Byte
Third Byte
WRITE Format Packet Detail
Station Address with LSB Set LOW
Device Register Address (0..255)
Register Data (0..255)
Table 6. WRITE Format Packet
Byte Sequence
ADDRESS SET format
Packet Details
Station Address with LSB Set LOW
Device Register Address (0..255)
Table 7. ADDRESS SET Format Packet Operation
First Byte
Second Byte
External
controller
EPROM
s
2
C
p
2
C
CS7615
CS7654
Figure 16. I
2
C configuration showing primary
and secondary I
2
C busses.
To other sub-systems
Byte Sequence
First Byte
READ Format Packet Details
Station Address with LSB set HIGH;
Source Device then Returns One
Byte of Register Data (0..255)
Returned data from CS7654
Table 8. READ Format Packet.
Second Byte
相关PDF资料 |
PDF描述 |
|---|---|
| CS7666 | DIGITAL COLOR-SPACE PROCESSOR FOR CCD CAMERAS |
| CS7666-KQ | DIGITAL COLOR-SPACE PROCESSOR FOR CCD CAMERAS |
| CS7808 | MULTI PURPOSE AUDIO/VIDEO EMBEDDED PROCESSOR |
| CS7808-CM | MULTI PURPOSE AUDIO/VIDEO EMBEDDED PROCESSOR |
| CS80C86 | CMOS 16-Bit Microprocessor |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CS7655AM | 制造商:Cypress Semiconductor 功能描述:PLAT - Rail/Tube 制造商:Cypress Semiconductor 功能描述:SEMICONDUCTOR OTHER |
| CS7655AMT | 制造商:Cypress Semiconductor 功能描述:PLAT - Tape and Reel 制造商:Cypress Semiconductor 功能描述:SEMICONDUCTOR OTHER |
| CS7660 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Digital Video Color-Space Processor |
| CS7660-KM | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Image Processor |
| CS7665 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:Digital Color-Space Processor for CCD Cameras |
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