MSP3400CPP View Datasheet(PDF) - Micronas

Part Name

Description

Manufacturer

MSP3400CPP

Multistandard Sound Processor

Micronas 

PRELIMINARY DATA SHEET

5.3. Start Up Sequence

After power on or RESET, the IC is in an inactive state.

The CCU has to transmit the required coefficient set for

a given operation via the I2C bus. Initialization must start

with the demodulator part. If required for any reason, the

audio processing part can be loaded before the demo-

dulator part.

The reset pin should not be > 0.45 DVSUP (see recom-

mended operation conditions) before the 5 Volt digital

power supply (DVSUP) and the analog power supply

(AVSUP) are > 4.75 Volt and the MSP-Clock is running

(Delay: 2 ms max, 0.5 ms typ.).

This means, if the reset low-high edge starts with a delay

of 2 ms after DVSUP> 4.75 Volt and AVSUP>4.75 Volt,

even under worst case conditions, the reset is ok.

MSP 3400C

DVSUP/V

AVSUP/V

4.75

Oscillator

max. 2

RESETQ

0.45 * DVSUP

Fig. 5–3: Power-up sequence

Micronas

min. 2

time / ms

time / ms

time / ms

Note: The reset should

not reach high level be-

fore the oscillator has

started. This requires a

reset delay of >2 ms

19

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