User's Manual

MC46 Hardware Interface Description
Confidential / Released
s
mo b i l e
MC46_HD_V03.05 Page 75 of 99 13.11.2003
Function Signal name IO Signal form and level Comments
RFSDAI I
RXDDAI I
SCLK I
TFSDAI O
Digital audio
interface
TXDDAI O
V
OL
max = 0.2V at I = 1mA
V
OH
min = 2.35V at I = -1mA
V
OH
max = 2.73V
V
IL
max = 0.5V
V
IH
min = 1.95V, V
IH
max = 3.3V
I
I
max = 330µA at V
IN
= 3.3V
If unused keep pins open.
EPP2 O
EPN2 O
V
O
max = 3.7Vpp
See also Table 31.
The audio output is
balanced and can directly
operate an earpiece.
If unused keep pins open.
EPP1 O
EPN1 O
V
O
max = 3.7Vpp
See also Table 31.
Balanced audio output.
Can be used to directly
operate an earpiece.
If unused keep pins open.
MICP1 I
MICN1 I
R
I
# 50kW differential
V
I
max = 1.03Vpp
See also Table 32.
Balanced microphone
input. To be decoupled
with 2 capacitors (C
K
=
100nF), if connected to a
microphone or another
device.
If unused keep pins open.
MICP2 I
MICN2 I
R
I
= 2kW differential
V
I
max = 1.03Vpp
See also Table 32.
Balanced microphone
input. Can be used to
directly feed an active
microphone.
If used for another signal
source, e.g. op amp, to be
decoupled with capacitors.
If unused keep pins open.
Analog audio
interfaces
AGND Separate ground
connection for external
audio circuits.
Explanation of signal names: P = positive, N = negative