MCBSTM32EXL Keil, MCBSTM32EXL Datasheet - Page 626
MCBSTM32EXL
Manufacturer Part Number
MCBSTM32EXL
Description
BOARD EVALUATION FOR STM32F103ZE
Manufacturer
Keil
Specifications of MCBSTM32EXL
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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Inter-integrated circuit (I
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Communication flow
In Master mode, the I
serial data transfer always begins with a start condition and ends with a stop condition. Both
start and stop conditions are generated in master mode by software.
In Slave mode, the interface is capable of recognizing its own addresses (7 or 10-bit), and
the General Call address. The General Call address detection may be enabled or disabled
by software.
Data and addresses are transferred as 8-bit bytes, MSB first. The first byte(s) following the
start condition contain the address (one in 7-bit mode, two in 10-bit mode). The address is
always transmitted in Master mode.
A 9th clock pulse follows the 8 clock cycles of a byte transfer, during which the receiver must
send an acknowledge bit to the transmitter. Refer to the following figure.
Figure 231. I
Acknowledge may be enabled or disabled by software. The I
addressing 7-bit/ 10-bit and/or general call address) can be selected by software.
The block diagram of the I
2
2
C) interface
C bus protocol
SCL
SDA
condition
2
C interface initiates a data transfer and generates the clock signal. A
Start
2
C interface is shown in
Doc ID 13902 Rev 9
MSB
1
2
Figure
8
232.
2
C interface addresses (dual
ACK
9
condition
Stop
RM0008
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