Datasheet

Preliminary Data Sheet
BMA400
Page 42 /
Confidential
BST-BMA400-DS000-00 | Version 0.1 | November 2017 Bosch Sensortec
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Note: Specifications within this document are subject to change without notice.
Electrical Interrupt Pin Behavior
Both interrupt pins INT1 and INT2 can be configured to show the desired electrical behavior.
The ‘active’ level of each interrupt pin is determined by the int1_lvl and int2_lvl bits.
If int1_lvl = 1 / int2_lvl = 1, then pin “INT1” / pin “INT2” are active HIGH.
The characteristic of the output driver of the interrupt pins is configured with bits int1_od and int2_od.
By setting bits int1_od / int2_od to ‘1’, the output drivers show open-drive characteristic, by setting
the configuration bits to 0, the output drivers show CMOS push-pull characteristic.
When open-drive characteristic is selected in the design, an external pull-up or pull-down resistor
should be applied according the int(1/2)_lvl configuration.
For all interrupts, the user is responsible of the settings, no hardware checks of the settings are
implemented before processing interrupts.
int(1/2)_od
int(1/2)_lvl
“INT1” / “INT2”
output driver
0
0
active ‘0’
push-pull characteristic
0
1
active ‘1’
push-pull characteristic
1
0
active ‘0’
open-drive characteristic sink (NMOS)
1
1
active ‘1’
open-drive characteristic source
(PMOS)
Confidential and under NDA
Seeed Studio
Confidential and under NDA
Seeed Studio
Confidential and under NDA