參數(shù)資料
型號: ICS951601
英文描述: General Purpose Frequency Timing Generator
中文描述: 通用頻率定時發(fā)生器
文件頁數(shù): 3/9頁
文件大小: 119K
代理商: ICS951601
3
ICS951601
Preliminary Prouct Preview
0663B—09/04/03
1.
The ICS clock generator is a slave/receiver, I
2
C component. It can read back the data stored in the latches for
verification.
Read-Back will support Intel PIIX4 "Block-Read" protocol
.
The data transfer rate supported by this clock generator is 100K bits/sec or less (standard mode)
The input is operating at 3.3V logic levels.
The data byte format is 8 bit bytes.
To simplify the clock generator I
2
C interface, the protocol is set to use only "
Block-Writes
" from the controller.
The bytes must be accessed in sequential order from lowest to highest byte with the ability to stop after any
complete byte has been transferred. The Command code and Byte count shown above must be sent, but the
data is ignored for those two bytes. The data is loaded until a Stop sequence is issued.
At power-on, all registers are set to a default condition, as shown.
2.
3.
4.
5.
6.
General I
2
C serial interface information
The information in this section assumes familiarity with I
2
C programming.
For more information, contact ICS for an I
2
C programming application note.
How to Write:
Controller (host) sends a start bit.
Controller (host) sends the write address D2
(H)
ICS clock will
acknowledge
Controller (host) sends a dummy command code
ICS clock will
acknowledge
Controller (host) sends a dummy byte count
ICS clock will
acknowledge
Controller (host) starts sending first byte (Byte 0)
through byte 5
ICS clock will
acknowledge
each byte
one at a
time
.
Controller (host) sends a Stop bit
How to Write:
How to Read:
Controller (host) will send start bit.
Controller (host) sends the read address D3
(H)
ICS clock will
acknowledge
ICS clock will send the
byte count
Controller (host) acknowledges
ICS clock sends first byte
(Byte 0) through byte 5
Controller (host) will need to acknowledge each byte
Controller (host) will send a stop bit
Notes:
Controller (Host)
Start Bit
Address
D3
(H)
ICS (Slave/Receiver)
ACK
Byte Count
ACK
Byte 0
ACK
Byte 1
ACK
Byte 2
ACK
Byte 3
ACK
Byte 4
ACK
Byte 5
ACK
Stop Bit
How to Read:
Controller (Host)
Start Bit
Address
D2
(H)
ICS (Slave/Receiver)
ACK
Dummy Command Code
ACK
Dummy Byte Count
ACK
Byte 0
ACK
Byte 1
ACK
Byte 2
ACK
Byte 3
ACK
Byte 4
ACK
Byte 5
ACK
Stop Bit
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