Bosch MAN-REG-X-08 Especificaciones descargar pdf (Pagina 9)

Data sheet

BMA220

Page 9

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.

4. Global memory map

The memory map below shows all externally accessible data registers which are needed to

operate BMA220.The left columns show the memory addresses. The columns in the middle

depict the content of each register bit. The colors of the bits indicate whether they are read-only,

write-only or read- and writable. The memory is volatile so that the writable content has to be re-

written after each power-on.

The extended address space greater than 0x19 (SPI) / 0x32 (I

C) is not shown. These registers

are reserved for further Bosch factory testing and trimming.

Address

(I²C)

Address

(SPI)

bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0

default after

power-up

0x32 0x19 0x00

0x30 0x18 0x00

0x2E 0x17 WDT_TO_en WDT_TO_sel SPI3 0x00

0x2C 0x16 0x00

0x2A 0x15 0x00

0x28 0x14 0x00

0x26 0x13 0x00

0x24 0x12 0x10

0x22 0x11

sbist_sign

0x00

0x20 0x10

serial_high_bw

0x00

0x1E 0x0F unused sleep_en

en_x_channel en_y_channel en_z_channel

0x07

0x1C 0x0E reset_int

en_low en_high_x en_high_y en_high_z

0x00

0x1A 0x0D

en_data en_orient en_slope_x en_slope_y en_slope_z en_tt_x en_tt_y en_tt_z

0x00

0x18 0x0C

tt_int low_int high_int data_int slope_int

0x00

0x16 0x0B

orient_int int_first_x int_first_y int_first_z int_sign

0x00

0x14 0x0A

tip_en

0x08

0x12 0x09

orient_ex slope_filt

0x45

0x10 0x08

tt_filt

0xB5

0xE 0x07 0x7F

0xC 0x06 0x4E

0xA 0x05 0x7F

0x8 0x04 0 0 0x00

0x6 0x03 0 0 0x00

0x4 0x02 0 0 0x00

0x2 0x01 0x00

0x0 0x00 0xDD

Chip ID

tt_samp[1:0]

slope_th[3:0] slope_dur[1:0]

tt_th[3:0] tt_dur[2:0]

acc_z<5:0>

acc_y<5:0>

acc_x<5:0>

Revision ID

low_th[3:0] high_th[3:0]

high_hy[1:0] high_dur[5:0]

low_hy[1:0] low_dur[5:0]

orient_blocking [1:0]

unused

lat_int[2:0]

unused

orient[2:0]

sbist (off,x,y,z)

filt_config[3:0]

unused

range[1:0]

sleep_dur[2:0]

reserved

softreset

suspend

unused

reserved

Figure 2: Memory map

Note

From SPI  I²C use burst address increment in 0x02h steps.

4.1 Control registers

4.1.1 3-wire SPI mode selection

The BMA220 supports both 4-wire and 3-wire SPI. The protocols are exactly the same except

for the fact that in 3-wire mode, the SDI pin is also used for data output.

The default mode is 4-wire SPI. If 3-wire SPI should be used, the SPI3 bit in register 0x17 (SPI)

must be set to ‘1’.

1 2 3 4 5 6 7 8 9 10 11 12 13 14 ... 62 63

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