21
IC, MAS3549F
Pin No.
Pin Name
I/O
Description
1
AGNDC
Analog reference voltage.
2
MICIN
I
Input for internal microphone amplifier.
3MICBI
I
Bias for internal microphone.
4
INL
I
Left A/D input. (Not used)
5
INR
I
Right A/D input. (Not used)
6
TE
I
Test enable. (Connected to ground)
7
XTI
I
Crystal oscillator (18.432MHz) input.
8
XTO
O
Crystal oscillator (18.432MHz) output.
9
POR
I
Power on reset. Active low.
10
VSS
DSP supply ground.
11
XVSS
Digital output supply ground.
12
VDD
DSP supply.
13XVDD
Digital output supply.
14
I2CVDD
I
2
C supply.
15
DVS
I
2
C device address selector. (Connected to ground)
16
VSENS1
I/O
Sense input and power output of DC/DC 1 converter.
17
DCSO1
DC/DC 1 switch output.
18
DCSG1
DC/DC 1 switch ground.
19
DCSG2
DC/DC 2 switch ground.
20
DCSO2
DC/DC 2 switch output.
21
VSENS2
I/O
Sense input and power output of DC/DC 2 converter.
22
DCEN
I
DC/DC enable (both converters).
23CLKO
O
Clock output. (Not used)
24
I2CC
I/O
I
2
C clock.
25
I2CD
I/O
I
2
C data.
26
SYNC
O
Sync output. (Not used)
27
VBAT
I
Battery voltage monitor input.
28
PUP
O
DC converter power-up signal. (Not used)
PIO end of DMA. Active low.
PIO ready to read. Active low.
PIO ready to write. Active low.
I
PIO DMA request. Active high.
I
PIO chip select. Active low.
PIO data bit 7 (MSB) ~ bit 0 (LSB).
Serial output data. (Not used)
43SOI
O
Serial output frame identification. (Not used)
44
SOC
O
Serial output clock. (Not used)
45
SID
I
Serial input data. Interface A. (Connected to ground)
46
SII
I
Serial input frame identification. Interface A. (Connected to ground)
47
SIC
I
Serial input clock. Interface A. (Connected to ground)
48
SPDO
O
S/PDIF output interface. (Not used)
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