Bosch MAN-REG-X-08 Especificaciones descargar pdf (Pagina 44)

Data sheet

BMA220

Page 44

BST-BMA220-DS003-08 | Revision 1.15 | August 2011 Bosch Sensortec

third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.

Note: Specifications within this document are subject to change without notice.

Table 21: I²C start/stop timing

Parameter Symbol Condition Min Units

START hold time T

HDSTA

0.6

START setup time T

SUSTA

0.6

STOP setup time T

SUSTO

0.6

Internal hold time T

HOLD_INT

f_SDA

= 100 ns

f_SCL

= 100 ns

0.3 (MAX)

Clock to Data Out T

VD_ACK

f_SDA

= 100 ns

f_SCL

= 100 ns

0.08

μs

Acknowledge

Each byte of data transferred must be acknowledged. It is indicated by an acknowledge bit sent

by the receiver. The transmitter must release the SDA line (no pull down) during the

acknowledge pulse while the receiver must then pull the SDA line low so that it remains stable

low during the high period of the acknowledge clock cycle.

SDA

By transmitter

SCK

Start condition

SDA

By receiver

9 8 2 1

Acknowledge

Not Acknowledge

Clock pulse for

acknowledgement

Figure 20: Waveform diagram for I²C acknowledgement on SDA

Data Transfer:

Each data bit transferred via SDA line must remain stable during high period of SCK pulse.

1 2 ... 39 40 41 42 43 44 45 46 47 48 49 ... 62 63

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