Specifications

BMA180
Preliminary data sheet
Bosch Sensortec
Rev. 1.0 Page 64 / - proprietary information - 06 March 2009
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as copying and passing on to third parties. BOSCH and the symbol are registered trademarks of Robert Bosch GmbH, Germany.
Specifications within this document are preliminary and subject to change without notice. Document is not intended for publication.
Start
RW Stop
1 0 0 0 0 0 1 0 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0
Register adress (02h)
CSB
=
0
CSB
=
1
Data byte Data byte
Data register - adress 03h Data register - adress 04h
Control byte Data byte
Data register - adress 02h
Figure 19: SPI multiple read
8.4.2 SPI timings
4-wire SPI timings Symbol Condition Min. Typ. Max Unit
SPI clock input
frequency
Fspi_4
Fspi_4_slow
VDDIO > 1.6V
VDDIO < 1.6V
10
7.5
MHz
MHz
SCK low pulse Tlow_sck_4 20 ns
SCK high pulse Thigh_sck_4 20 ns
SDI setup time Tsetup_sdi_4 20 ns
SDI hold time Thold_sdi_4 20 ns
SDO output delay
Tdelay_sdo_
4
25 pF load 30 ns
CSB setup time Tsetup_csb_
4
20 ns
CSB hold time Thold_csb_4 40 ns
CSB
SCK
T_setup_csb_4
T_low_sck_4 T_high_sck_4
T_hold_csb_4
SDI
T_setup_sdi_4 T_hold_sdi_4
SDO
T_delay_sdo_4
Figure 20: SPI timing