HMC5983-DEM Datasheet, PDF(13/28 Page) Honeywell Accelerometers

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HMC5983-DEM Datasheet, PDF (13/28 Pages) Honeywell Accelerometers – 3-Axis Digital Compass IC

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HMC5983

REGISTERS

This device is controlled and configured via a number of on-chip registers, which are described in this section. In the

following descriptions, set implies a logic 1, and reset or clear implies a logic 0, unless stated otherwise.

The table below lists the registers and their access. All address locations are 8 bits.

Table2: Register List

Address Location

0x00

0x01

0x02

0x03

0x04

0x05

0x06

0x07

0x08

0x09

0x0A

0x0B

0x0C

0x31

0x32

Name

Configuration Register A

Configuration Register B

Mode Register

Data Output X MSB Register

Data Output X LSB Register

Data Output Z MSB Register

Data Output Z LSB Register

Data Output Y MSB Register

Data Output Y LSB Register

Status Register

Identification Register A

Identification Register B

Identification Register C

Temperature Output MSB Register

Temperature Output LSB Register

Access

Read/Write

Read

This section describes the process of reading from and writing to this device. The devices uses an address pointer to

indicate which register location is to be read from or written to. These pointer locations are sent from the master to this

slave device and succeed the 7-bit address (0x1E) plus 1 bit read/write identifier, i.e. 0x3D for read and 0x3C for write.

To minimize the communication between the master and this device, the address pointer updated automatically without

master intervention. The register pointer will be incremented by 1 automatically after the current register has been read

successfully.

The address pointer value itself cannot be read via the IÂ²C bus.

Any attempt to read an invalid address location returns 0âs, and any write to an invalid address location or an undefined bit

within a valid address location is ignored by this device.

To move the address pointer to a random register location, first issue a âwriteâ to that register location with no data byte

following the commend. For example, to move the address pointer to register 10, send 0x3C 0x0A.

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