MAS3587F datasheet(17/82 Pages) MICRONAS

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ADVANCE INFORMATION

MAS 3587F

Micronas

3. I2C Interface

3.1. General

3.1.1. Device Address

Controlling the MAS 3587F is done via an I2C slave

interface. The device addresses are 3C/3Ehex (device

write) and 3D/3Fhex (device read) as shown in Table 3–

1. The device address pair 3C/3Dhex applies if the DVS

pin is connected to VSS, the device address pair 3E/

3Fhex applies if the DVS pin is connected to VDD.

I2C clock synchronization is used to slow down the

interface if required.

3.1.2. I2C Registers and Subaddresses

The interface uses one level of subaddresses. The

MAS 3587F interface has 7 subaddresses allocated

for the corresponding I2C registers. The registers can

be divided into three categories as shown in Table 3–2.

The address 6Ahex is used for basic control, i.e. reset

and task select. The other addresses are used for data

transfer from/to the MAS 3587F.

The I2C registers of the MAS 3587F are 16 bits wide,

the MSB is denoted as bit[15]. Transmissions via I2C

bus have to take place in 16-bit words (two byte trans-

fers, MSB sent first); thus, for each register access,

two 8-bit data words must be sent/received via I2C

bus.

Table 3–1: I2C device address

W/R

001

111DVS

0/1

Table 3–2: I2C Subaddresses

Sub-

address

(hex)

I2C-

Name

Function

Direct Configuration

CON-

TROL

Controller writes to

MAS 3587F control register

DCCF

Controller writes to first

DC/DC configuration regis-

ter

DCFR

Controller writes to

second DC/DC config reg.

DSP Core Access

DATA

(WRITE)

Controller writes to

MAS 3587F DSP

DATA

(READ)

Controller reads from

MAS 3587F DSP

Codec Access

CODEC

(WRITE)

Controller writes to

MAS 3587F codec register

CODEC

(READ)

Controller reads from

MAS 3587F codec register

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