MC97F2664
194
April 11, 2014 Ver. 1.4
11.11.14 USI0/1 I2C Mode
The USI0/1 can be set to operate in industrial standard serial communication protocols mode. The I2C mode
uses 2 bus lines serial data line (SDAn) and serial clock line (SCLn) to exchange data. Because both SDAn and
SCLn lines are open-drain output, each line needs pull-up resistor. The features are as shown below.
- Compatible with I2C bus standard
- Multi-master operation
- Up to 400kHz data transfer read speed
- 7 bit address
- Both master and slave operation
- Bus busy detection
11.11.15 USI0/1 I2C Bit Transfer
The data on the SDAn line must be stable during HIGH period of the clock, SCLn. The HIGH or LOW state of
the data line can only change when the clock signal on the SCLn line is LOW. The exceptions are START(S),
repeated START(Sr) and STOP(P) condition where data line changes when clock line is high.
Figure 11.50 Bit Transfer on the I2C-Bus (USIn, where n = 0 and 1)
SCLn
SDAn
Data line Stable:
Data valid
except S, Sr, P
Change of Data
allowed
Содержание MC97F2664
Страница 20: ...MC97F2664 20 April 11 2014 Ver 1 4 4 Package Diagram Figure 4 1 64 Pin LQFP 1010 Package...
Страница 21: ...MC97F2664 April 11 2014 Ver 1 4 21 Figure 4 2 64 Pin LQFP 1414 Package...
Страница 22: ...MC97F2664 22 April 11 2014 Ver 1 4 Figure 4 3 64 Pin QFN Package...
Страница 23: ...MC97F2664 April 11 2014 Ver 1 4 23 Figure 4 4 44 Pin MQFP 1010 Package...