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1.2
Abbreviations
B:
Crystal
C:
Capacitor
R:
Resistor
L:
Coil
F:
Over-voltage protection
D:
Digital circuit
H:
Buzzer, LED, pads for display
J:
Connector
N:
Analogue circuit
U:
Balun
V:
Transistor, diode
X:
Antenna connector, connector-surface on the board
Z:
Filter
EFRA:
AGND:
DCIO:
GND:
VRPAD:
VBATT:
VDIG:
VDSP:
VDD:
VLCD:
VRAD:
VVCO:
LED:
ONSRQ:
EXTAUD:
EXTAUD1:
LO:
RTC:
I2C:
SIMCONCLK: Signal from the processor used for communication to SIM, clock signal.
SIMCONDAT: Signal from the processor used for communication to SIM, data signal.
4/00021-3/FEA 209 544/18 B
Trouble shooting and radio calibration software.
Ground for analogue signal.
DC-voltage through the system connector for charging.
Digital ground.
For the radio-part of the processor and top indicator/ buzzer. 3,8 ± 0.05 V
Battery voltage. 4.8 ± 0.05 V
DC voltage for the processor and memory. 3,2 ± 0.05 V
DC voltage for the DSP (Digital Signal Processor). 3,2 ± 0.05 V
VDIG from the phone voltage through the system connector. 3,2 ± 0.05 V
DC voltage for the display that controls the contrast. -2,7 V
DC voltage for the radio part except the synthesiser. 3,8 ± 0.20 V
DC voltage for the synthesiser. 3,8 ± 0.10 V
Light emitting diode e.g. the background illumination.
Voltage from the On/ Off key that starts the phone.
Input signal at the system connector that the processor use to determinate if
there is any external audio equipment attached.
The same signal as the EXTAUD but at the processor side.
Local oscillator.
Real Time Clock, the internal clock the clock that keeps track of time.
Communications standard for two-way communication using only 2 wires,
clock and data.
Trouble Shooting Guide, Advanced
DC.
DC.
DC.
DC.
DC.
DC.
DC.
DC.
4(121)
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