BMA020 Bosch Sensortec, BMA020 Datasheet - Page 12

• Manufacturer Part Number: BMA020
• Description: 3-AXIS ACCELEROMETER DIGITAL I/F
• Manufacturer: Bosch Sensortec

Specifications of BMA020

• Axis: X, Y, Z
• Acceleration Range: ± 2g, 4g, 8g
• Sensitivity: 256LSB/g, 128LSB/g, 64LSB/g
• Voltage - Supply: 2 V ~ 3.6 V
• Output Type: Digital
• Bandwidth: 3kHz
• Interface: I²C, SPI
• Mounting Type: Surface Mount
• Package / Case: 12-LGA
• For Use With: 828-1014 - BMA020 TRIBOX DEMO BOARD W/USB828-1008 - BMA020 DAUGHTERCARD FOR DEV KIT
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 828-1000-2

If a not-latched interrupt is generated, the device waits in the normal mode till the interrupt
condition disappears. The minimum duration of interrupt activation is 330µs. If no interrupt is
generated, the sensor IC goes to sleep mode for a defined time (wake_up_pause).
For more details on the wake-up functionality, please refer to chapter 7.3
3.1.5 Wake_up_pause
These bits (address 15h, bit 2 and 1) define the sleep phase duration between each automatic
wake-up.
Table 5: Settings of wake_up_pause
Note: The accuracy of the wake-up timer is about ±30%.
3.1.6 Shadow_dis
BMA020 provides the possibility to block the update of data MSB while LSB are read out. This
avoids a potential mixing of LSB and MSB of successive conversion cycles. When this bit
(address 15h, bit 3) is at 1, the blocking procedure for MSB is not realized and MSB only
reading is possible.
Rev. 1.2
© Bosch Sensortec GmbH reserves all rights even in the event of industrial property rights. We reserve all rights of disposal such
as copying and passing on to 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.
wake_up_pause<1:0>
00
01
10
11
Digital, triaxial acceleration sensor
Sleep phase duration
Data sheet
BMA020
Page 12
2560 ms
320 ms
20 ms
80 ms
Bosch Sensortec
30 May 2008