Figure 110 ALS HW implementation
Table 17 ALS resistor values
Symbol
R1
R2
R3
R4
R5
R6
R7
NTC-res
Value
5 kOhm
15 kOhm
30 kOhm
50 kOhm
470
kOhm
100
kohm
470
kohm
47 kOhm
ASICs
RAP3G ASIC
RAP3G ASIC is a 3G Radio Application Processor. RAM memory is integrated into RAP3G.
In general RAP3G consists of three separate parts:
• Processor subsystem (PSS) that includes the main processor and related functions
• MCU peripherals that are mainly controlled by MCU
• DSP peripherals that are mainly controlled by DSP
RAP3G core voltage (1.4V) is generated from Tahvo VCORE and I/O voltage (1.8V) is from Retu VIO. The core
voltage in sleep mode is lowered to 1.05V.
Retu EM ASIC
Retu EM ASIC includes the following functional blocks:
• Start up logic and reset control
• Charger detection
• Battery voltage monitoring
• 32.768kHz clock with external crystal
• Real time clock with external backup battery
• SIM card interface
• Stereo audio codecs and amplifiers
• A/D converter
• Regulators
• Vibra interface
• Digital interface (CBUS)
RM-42
System Module
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