MAS3507D Micronas Intermetall, MAS3507D Datasheet - Page 10

• Manufacturer Part Number: MAS3507D
• Description: Mpeg 1/2 Layer 2/3 Audio Decoder
• Manufacturer: Micronas Intermetall

MAS 3507D
2.6.4. Start-up Sequence
The DC/DC converter starts from a minimum input
voltage of 0.9 V. There should be no output load during
startup. In case WSEN is active, the MAS 3507D is in
the DSP operation mode. The start-up script should be
as follows:
1. Enable the DC/DC-converter with a high signal
2. Wait until PUP goes “high”.
3. Wait one more millisecond to guarantee that the out-
4. Enable the MAS 3507D with a “high” signal at pin
Please also refer to Figure 2–2.
Fig. 2–3: DC/DC converter connections
10
DCCF
$8e
(VDD, AVDD) at pin DCEN.
put voltage has settled (recommended).
“WSEN”.
9
CLKI
10
Frequency
oscillator
Start-up
divider
+32
x2
64...94
32...47
0...15
VDD
16
voltage monitor
converter
DC/DC
VSS
AVDD
AVSS
VSENSE
WSEN
DCSO
DCSG
DCEN
PUP
WSEN > 2 V
Fig. 2–2: DC/DC operation
µController
> 0.9 V
Push Button
47 k
Power-On
10 k
47 k
optional
filter
10 nF
DCEN
button
µController
C
330 F
Low ESR
330 F
22 H
out
=1
PRELIMINARY DATA SHEET
C
in
operation
DSP
DC/DC
On
V
0.9 V
in
Micronas