User Guide

RM-11
System Module CC Technical Documentation
Page 26 ©2004 Nokia Corporation Confidential Issue 1 02/2004
BB_RF Interface Connections
The BB and RF parts are connected together without a physical connector.
Figure 21: BB_RF interface connections (1)
Rip
#
Signal
Name
DAMPS,
GSM1900
Connected
from--- to
BB
I/O
Signal Properties
A/D--Levels---Freq./
Timing resolution
Description / Notes
RFICCNTRL(2:0) RF IC Control Bus from UPP to RF IC (TACO)
0
RFBUSCLK UPP RFIC In Dig
9.72 MHz RF Control serial bus bit clock
1
RFBUSDA UPP/RFIC RFIC
UPP
I/O Dig
Bi-directional RF Control serial bus data,
2
RFBUSEN1X UPP RFIC In Dig
0/1.8V
(0: <0.4V
1: >1.4 V)
RFIC Chip Sel X
PUSL(2:0) Power Up Reset from UEM to RF IC (TACO)
0
PURX UEM RFIC Out Dig
0/1.8V 10us Power Up Reset for RF IC
SLCLK & SLEEPX not used in RF
GENIO(28:0) General I/O Bus connected to RF, see also separate collective GENIO(28:0)
table. Control lines from UPP GENIOs to RF
5
TXP1 RFIC UPP Out Dig
0/1.8V
10 us Low Band Tx enabled
6
TXP2 RFIC UPP Out Dig
0/1.8V High Band Tx enabled
11
BANDSEL
RFIC
UPP Out Dig
0/1.8V Rx Band select. Option for module LNA.
Not used in Stella.