參數(shù)資料
型號(hào): Si571
廠商: Silicon Laboratories Inc.
英文描述: ANY-RATE I2C PROGRAMMABLE XO/VCXO
中文描述: 任意頻率I2C可編程振蕩器/壓控
文件頁數(shù): 13/26頁
文件大?。?/td> 295K
代理商: SI571
Si570/Si571
Rev. 0.3
13
3.3. I
2
C Interface
The control interface to the Si570 is an I
2
C-compatible
2-wire bus for bidirectional communication. The bus
consists of a bidirectional serial data line (SDA) and a
serial clock input (SCL). Both lines must be connected
to the positive supply via an external pullup. Fast mode
operation is supported for transfer rates up to 400 kbps
as specified in the I
2
C-Bus Specification standard.
Figure 3 shows the command format for both read and
write access. Data is always sent MSB first. The timing
specifications and timing diagram for the I
2
C bus can be
found in the I
2
C-Bus Specification standard (fast mode
operation). The device I
2
C address is specified in the
part number.
Figure 3. I
2
C Command Format
A
Data
A
Data
P
A
1
Slave Address
S
A
Byte Address
A
0
Slave Address
S
From master to slave
From slave to master
A – Acknowledge (SDA LOW)
S – START condition
P – STOP condition
Write Command
Read Command
Address auto incremented after each data read or write
P
A
Data
A
Data
A
Byte Address
A
0
Slave Address
S
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