MMA8450QT datasheet(19/57 Pages) FREESCALE

19 / 57 page

Sensors

Freescale Semiconductor

MMA8450Q

Table 11 is the memory map of the MMA8450Q.The user has access to all addresses from 0x00 to 0x3F.

Table 11. Register Address Map

Name

Type

Address

Auto-Increment

Address

Default

Comment

STATUS(1)(2)

0x00

0x01

00000000

Addresses 0x00, 0x04, 0x0B are aliases to the

same register. Data Ready status information or

FIFO status information.

OUT_X_MSB(1)(2)

0x01

0x02

0x01

output

[7:0] are 8 MSBs of

12-bit real-time sample.

Root pointer to XYZ

FIFO 8-bit data.

OUT_Y_MSB(1)(2)

0x02

0x03

output

[7:0] are 8 MSBs of 12-bit real-time sample

OUT_Z_MSB(1)(2)

R0x03

0x00

output

[7:0] are 8 MSBs of 12-bit real-time sample

STATUS(1)(2)

0x04

0x05

00000000

Addresses 0x00, 0x04, 0x0B are aliases to the

same register. Data Ready status information or

FIFO status information.

OUT_X_LSB(1)(2)

0x05

0x06

0x05

output

[3:0] are 4 LSBs of

12-bit sample.

Root pointer to XYZ

FIFO 12-bit data.

OUT_X_MSB(1)(2)

0x06

0x07

output

[7:0] are 8 MSBs of 12-bit real-time sample

OUT_Y_LSB(1)(2)

0x07

0x08

output

[3:0] are 4 LSBs of 12-bit real-time sample

OUT_Y_MSB(1)(2)

0x08

0x09

output

[7:0] are 8 MSBs of 12-bit real-time sample

OUT_Z_LSB(1)(2)

0x09

0x0A

output

[3:0] are 4 LSBs of 12-bit real-time sample

OUT_Z_MSB(1)(2)

R0x0A

0x04

output

[7:0] are 8 MSBs of 12-bit real-time sample

STATUS(1)(2)

0x0B

0x0C

00000000

Addresses 0x00, 0x04, 0x0B are aliases to the

same register. Data Ready status information or

FIFO status information.

OUT_X_DELTA(1)(2)

0x0C

0x0D

output

8-bit AC X-axis data

OUT_Y_DELTA(1)(2)

0x0D

0x0E

output

8-bit AC Y-axis data

OUT_Z_DELTA(1)(2)

R0x0E

0x0B

output

8-bit AC Z-axis data

WHO_AM_I(1)

0x0F

0xC6

11000110

NWM Programmable Fixed Device ID No.

F_STATUS(1)(2)

0x10

0x11

00000000

FIFO Status: No FIFO event Detected

F_8DATA(1)(2)

R0x11

0x11

Output

FIFO status and 8-bit samples

F_12DATA(1)(2)

R0x12

0x12

Output

FIFO status and 12-bit samples

F_SETUP(1)(3)

R/W

0x13

0x14

00000000

FIFO setup

SYSMOD(1)(2)

0x14

0x15

Output

Current System Mode

INT_SOURCE(1)(2)

0x15

0x16

Output

Interrupt status

XYZ_DATA_CFG(1)(4)

R/W

0x16

0x17

00000000

Acceleration data event flag configuration

HP_FILTER_CUTOFF

1,3

R/W

0x17

0x18

00000000

Cutoff frequency is set to 4Hz @ 400Hz

PL_STATUS(1)(2)

0x18

0x19

00000000

Landscape/Portrait orientation status

PL_PRE_STATUS(1)(2)

0x19

0x1A

00000000

Landscape/Portrait previous orientation

PL_CFG(1)(4)

R/W

0x1A

0x1B

10000011

Landscape/Portrait configuration.

1g Lockout offset is set to default value of 1.15g.

Debounce counters are clear during invalid

sequence condition.

PL_COUNT(1)(3)

R/W

0x1B

0x1C

00000000

Landscape/Portrait debounce counter

PL_BF_ZCOMP(1)(4)

R/W

0x1C

0x1D

00000010

Back-Front Trip threshold is

±75°.

Z-Lockout angle is 32.14°

PL_P_L_THS_REG1(1)(4)

R/W

0x1D

0x1E

00011010

Portrait-to-Landscape Trip Angle is 30°

MMA8450QT Datasheet(PDF) 19 Page - Freescale Semiconductor, Inc

MMA8450QT Datasheet(HTML) 19 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57

Datasheet Download

Link URL