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AC75 Hardware Interface Description
Strictly confidential / Preliminary
2.3
Circuit Concept
Figure 1 shows a block diagram of the AC75 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)
•
Antenna diagnostic
RF section:
•
RF transceiver
•
RF power amplifier
•
RF front end
•
Antenna connector
Front End
RF Power
Amplifier
Transceiver
NTC
Antenna
Diagnostic
AC75
AC75_HD_V00.202
3
26MHz
26MHz
32.768kHz
RTC
Interface
RF - Baseband
RF Control Bus
4
I / Q
REFCHG
Measuring
TEMP2
Network
BATTYPE
ADC
Figure 2: AC75 block diagram
Page 20 of 120
RD; WR; CS; WAIT
Digital Baseband
Processer with DSP
CCIN
CCRST
5
CCIO
CCCLK
CCVCC
Analog
Controller
with PSU
RESET
s
SRAM
D(0:15)
A(0:24)
Flash
ASC(0)
8
4
ASC(1)
2
I2C/SPI
2
SPI
3
USB
10
GPIO
7
DAI
SYNC
6
SIM Interface
PWR_IND
VEXT
DAC_OUT
EMERG_RST
10
Audio analog
IGT
VDDLP
CHARGEGATE
VCHARGE
ISENSE
VSENSE
BATT_TEMP
5
BATT+
8
GND
27.04.2006
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