Specifications

Data sheet
BMA220
Page 45
BST-BMA220-DS003-08 | Revision 1.15 | August 2011 Bosch Sensortec
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Note: Specifications within this document are subject to change without notice.
SDA
SCK
Change of
data allowed
Data line
stable, data
valid
Tsudat
Thddat
Figure 21: Waveform diagram for one bit transfer with I²C interface
Table 22: I²C data transfer timing
# Parameter Symbol Min Max Units
1 DATA hold time T
HDDAT
0 0.9
2 DATA setup time T
SUDAT
0.1 -
μs
The first byte of data transmitted after start condition contains the 7-bit address of I²C slave.
The 8
th
bit is an R/W bit which tells whether the master wants to read (R/W = 1) or write
(R/W = 0) data from/to the slave.
Once the slave is addressed, it sends a low active acknowledge bit and accepts the following
data transferred by master. Otherwise it aborts the current data transfer and waits for the start
condition of next data transmission.