Baseband - Rf Interface; Internal Signals And Connections; Audio - Nokia RH-53 Manual

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Baseband - RF interface

The interface between the baseband and the RF can be divided into three categories:
- The digital interface from the UPP to the RF ASIC (Mjoelner). The serial digital interface is
used to control the operation of the different blocks in the RF ASICs.
- The analogue interface between UEM and the RF. The analogue interface consists of RX and
TX converter signals. The power amplifier control signal TXC and the AFC signal comes as well
from the UEM.
- Reference clock interface between Mjoelner and UPP, which supplies the 26Mhz system
clock for the UPP.
■

Internal Signals and Connections

The tables below describe internal signals. The signal names can be found on the schematic
for the PWB.

Audio

Signal
MIC1P (Differential input P)
MIC1N (Differential input N)
MICB1 (Microphone Bias)
External loading of MICB1
Table 8: Internal speaker (Differential output EARP & EARN)
Signal
Output voltage swing
Load Resistance (EARP to
EARN)
Load Capacitance (EARP to
EARN)
18
Table 7:
Internal microphone
No
Min
m
- 5mV
- 5mV
2.0 2.1
V V
- -
No
Min
m
4.0 -
25,5 27,
2
- -
COMPANY CONFIDENTIAL
Copyright © 2004 Nokia. All Rights Reserved.
Conditi
Max
on
- TBD
- TBD
2.25 V DC
600uA DC
Max Units
- Vpp
28,9 W
50 nF
RH-53/54
8-System Module
Note
Note
Differential output
2*10Ù 5% +
7,2Ù±10%
ISSUE 1 09/2004