User Guide

PAMS Technical Documentation 3. System Module
NSD-5
Issue 1 05/02 Nokia Corporation Page 19
RX_IF_AGC
Signal from MAD4 pin A16 (mdRxIfAgc) to RIF pin AGC to control the gain of the receive
IF section. It is activated only by CDMA.
CAFE Module/Interface
CAFE Module Description
Introduction
CAFE module provides an interface between the digital portion of the phone (CDMA dig-
ital data and control signal processing) and the analog portion (RF). It consists of CAFE
ASIC and some discrete components around the ASIC. It also provides an interface
between MCU/DSP and external audio accessory.
Inside CAFE ASIC, there are several sub-blocks: CDMA receive A/D converter, CDMA
receive FIR filter, CDMA transmit D/A converter, PLL clock recovery circuitry, and audio
CODEC. Externally, the module contains some data buses and control lines, as well as
some clock signals.
Figure 10 provides a brief overview of the interface.
Type Range Resolution
Load
impedance
Filtering
PDM 0 - 2.8V 8bits @ 9.6 MHz clock Min: 10k
BB: RC = 1.0 x 10
-4
sec