Nokia 3510i Service Manual
RH-9
System Module & UI
CCS Technical Documentation
Page 34
ãNokia Corporation
Issue 1 11/02
Figure 7: UEM & UPP SIM connections
The internal clock frequency from UPP CTSI block is 13 MHz in GSM. Thus to achieve the
minimum starting SIMCardClk rate of 3.25 MHz (as is required by the authentication
procedure) and the duty cycle requirement of between 40% and 60% then the slowest
possible clock supplied to the SIM has to be in the GSM system clock rate of 13/4 MHz.
minimum starting SIMCardClk rate of 3.25 MHz (as is required by the authentication
procedure) and the duty cycle requirement of between 40% and 60% then the slowest
possible clock supplied to the SIM has to be in the GSM system clock rate of 13/4 MHz.
Internal Audio
Earpiece
The earpiece selected for RH-9 is the standard DCT3 13-mm earpiece from PSS (previ-
ously used for 3210, 3310, 6210, 7110 among others). The earpiece design is leak tolerant.
ously used for 3210, 3310, 6210, 7110 among others). The earpiece design is leak tolerant.
The internal earpiece is a dynamic earpiece with an impedance of 32 ohms. The earpiece
is a low impedance type, since the sound pressure is to be generated using current and
not voltage as the supply voltage is restricted to 2.7V. The earpiece is driven directly by
the UEM and the earpiece driver in UEM is a bridge amplifier.
is a low impedance type, since the sound pressure is to be generated using current and
not voltage as the supply voltage is restricted to 2.7V. The earpiece is driven directly by
the UEM and the earpiece driver in UEM is a bridge amplifier.
Figure 8: Speaker Interface
Earpiece Acoustic Design
The earpiece acoustics is designed to be type approved by type 3.2, low leak artificial ear
UEM
UPP
C5 C6 C7
C1 C2 C3
SIMDATA
Data
SIMClk
SIMCLK
SIMIO
SIMRST
VSIM
From Battery Type
contact
contact
SIMIO
SIMClk
Data
GND
GND
SIM
SIMIF
register
register
UEM
digital
logic
digital
logic
BSI
UIF Block
CBusDa
CBusEnX
CBusClk
C8
C4
UEMInt
EARN
EARP
EARP
EARN
UEM
10
10