參數(shù)資料
型號: AMIS-30622
英文描述: I2C Microstepping Motordriver
中文描述: 的I2C微步Motordriver
文件頁數(shù): 27/35頁
文件大?。?/td> 2887K
代理商: AMIS-30622
AMI Semiconductor - Rev. 2.3
www.amis.com
27
9.2.4 Inter-IC Control (I
2
C) Bus
The I
2
C interface enabled in the AMIS-30622 uses pins 1 and
2 as Data I/O and Serial Clock respectively.
9.2.4.1 Physical Layer
Both SDA and SCK lines are connected to positive supply
voltage via a current source or pull-up resistor. When there
is no traffic on the bus both lines are high. Analog glitch
filters are implemented to suppress spikes with a length up
to 50 ns.
9.2.4.2 Communication on 2-wire Serial Bus Interface
Each communication starts with a Start condition and ends
with a Stop condition. Both conditions are unique and
cannot be confused with data. A high to low transition on
the SDA line while SCK is high defines a Start condition. A
low to high transition on the SDA line while SCK is high
defines a Stop condition. (see figure “Start / Stop
conditions” below). The master always generates the SCK
clock. On every rising transition of SCK the data on SDA is
valid. Data on SDA line is only allowed to change as long as
SCK is low.
Every byte sent on SDA must be 8-bit, with the most
significant bit (MSB) transferred first. The number of bytes
that can be transmitted to the AMIS-30622 is restricted to 8
bytes. Each byte is followed by an acknowledge bit, which is
issued by the receiving node (figure below).
Bit Transfer on 2-wire Serial Bus Interface
Start / Stop Conditions
AMIS-30622 I
2
C Microstepping Motordriver
Data Sheet
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