MAS3506D datasheet(14/52 Pages) MICRONAS

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MAS 3506D

PRELIMINARY DATA SHEET

Micronas

The commands are then executed by the DSP during

its normal operation without any loss or interruption of

the incoming data or outgoing audio data stream.

However, due to some time critical firmware parts, a

certain latency time for the response has to be

expected at the locations marked with a “W” (= wait).

The theoretical worst case response time does not

exceed 4 ms. However, the typical response time is

less than 0.5 ms.

3.2. I2C Control Register (Subaddress 6Ahex)

The I2C control register is a write-only register. Its

main purpose is the software reset of the MAS 3506D.

The software reset is done by writing a 16-bit word to

the MAS 3506D with bit 8 set. The 4 least significant

bits are reserved for task selection. The task selection

is only useful in combination with download software.

In the standard application these bits must always be

set to 0.

Fig. 3–1: I2C-bus protocol for the MAS 3506D. Signals originating from the MAS 3506D are grayed.

Table 3–3: Control register data bit assignment1)

1) x = don’t care, R = reset, T3...T0 = task selection

15 14 13 12 11 10 09 08 07 06 05 04 03 02 01 00

T3 T2 T1 T0

SDW

control

d3,d2

d1,d0

high byte data

low byte data

Example: I2C write access

SDA

SCL

DR (3bhex)

Example: I2C read access

DW (3ahex)

data_read (69hex)

SDW (3ahex)A

data_write (68hex)

high byte data

low byte data

W = Wait

A = Acknowledge (Ack)

N = Not Acknowledge (NAK)

S = Start

P = Stop

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