User Guide

NEM-2
System Module and User Interface CCS Technical Documentation
Page 32 Copyright Nokia. All rights reserved. Issue 1 07/03
Phone- Audio Player Interface (MADI)
DCT4 Phone- Audio Player interface signals are specified below. Also the nick name
MADI (MCU- ADSP Interface) is frequently used. Refer to section Functional Description
for further details of the DCT4 Phone- Audio Player interface concept.
Symbol Parameter Min. typ. Max. Unit Note
AudioPlayerP-
wrOn
Audio Player
power enable
0 1.8 V active high; connected to audio
player power supply regulators
AudioPlayerRe-
setX
main Audio
Player reset
0 3.3 V active low; UEMK open drain
output, pull- up resistor inside
Audio Player part
AudioPlayer-
FlashRPX
Audio Player
flash reset
0 3.3 V active low; UEMK open drain
output, pull- up resistor inside
Audio Player part
AudioPlayerRxD audio player
receive data
0 1.8 V DCT4 Phone -> Audio Player; IR
level shifter inside UEMK used
AudioPlayerTxD audio player
transmit data
0 3.3 V Audio Player -> DCT4 Phone; IR
level shifter inside UEMK used
SleepClk RTC clock 0 1.8 V DCT4 Phone -> Audio Player; it is
under investigation if RTC inside
ADSP is needed
32 kHz
USBPwrDetec-
tion
USB power
detection
0 1.8 V active high; wake up from sleep
mode
LineInDetection Line- In detec-
tion
0 1.8 V active high; wake up from sleep
mode
GSM_HF phone audio
out
1 Vpp DCT4 Phone -> Audio Player,
mono GSM down link
FM-Radio_R FM radio, right
channel
80 200 mV
rms
FMR to Audio Player, stereo
Vrf=1mV, L=R, Delta f=22.5KHz,
fmod=1KHz
FM-Radio_L FM radio, left
channel
80 200 MV
rms
FMR to Audio Player, stereo
Vrf=1mV, L=R, Delta f=22.5KHz,
fmod=1KHz