User's Manual Part 1

MC75 Hardware Interface Description
Strictly confidential / Draft
s
MC75_V00.190a Page 20 of 91 15.02.2005
2.3 Circuit Concept
Figure 2 shows a block diagram of the MC75 module and illustrates the major functional
components:
Baseband Block:
• Digital baseband processor with DSP
• Analog processor with power supply unit (PSU)
• Flash / SRAM (stacked)
• Application interface (board-to-board connector)
RF section:
• RF transceiver
• RF power amplifier
• RF front end
• Antenna connector
Digital Baseband
Processor with DSP
Analog Contro ller
wit h PSU
BATT+
GND
IGT
EM ERG_ RS T
ASC(0)
5
SIM Inte rfa ce
CCIN
CCRST
CCIO
CCCLK
CCVCC
D(0:15)
A(0:24)
RD; WR; CS; WAI T
RF Control Bus
Interface
RF - Baseband
NTC
BATT_TEMP
VDDL P
SYN C
R
F
P
a
r
t
Trans ceiver
RF Power
Amplifier
SRAM
Flash
6
8
MC75
Application Interface (80 pins)
I / Q
4
Au di o a na log
10
SD Ca rd
USB
3
I2C
2
VEX T
ISENSE
VSE NSE
VC HA RG E
CHARGEGATE
3
RESET
R
e
s
e
t
BATTYPE
TE M P2
REFCHG
ASC(1)
4
26 MHz
Front End
DAI
7
8
PWR_IN D
Measuring
Network
32 .76 8kHz
26 MHz
RTC
Figure 2: MC75 block diagram