Nokia 9210i Service Manual
PAMS
Technical Documentation
RAE-5
3. RF+System Module KL8
Page 3 – 34
Issue 1 04/02
Figure 9.
System Connector
XMIC
MBUS
External RF with switch
DCE_TX
DCE_RX
DTR
GND
Spring contacts
SGND
XEAR
to PWB
L_GND
VIN
CHRG_CTRL
DC_jack
Guiding and locking holes
Serial connections
Serial interface signals are MBUS (DCE_DCD) [MBUS], DCE_RX [AccTxData],
DCE_TX [AccRxData] and DCE_DTR [DTR]. First name is the contact name in
the system connector and in square brackets is given the signal name used in
schematics. Note that all these signals are logic level signals thus interface
buffering/level sifting according some serial interface standards is done outside
RAE–5.
DCE_TX [AccRxData] and DCE_DTR [DTR]. First name is the contact name in
the system connector and in square brackets is given the signal name used in
schematics. Note that all these signals are logic level signals thus interface
buffering/level sifting according some serial interface standards is done outside
RAE–5.
MBUS is normally connected to PUP USART. When PUP USART is selected to
be connected to transmit and receive lines (FBUS use) MBUS is not usable as
a serial signal. In synchronous mode MBUS is used as USART’s clock input.
Synchronous mode is used in Flashing.
be connected to transmit and receive lines (FBUS use) MBUS is not usable as
a serial signal. In synchronous mode MBUS is used as USART’s clock input.
Synchronous mode is used in Flashing.
DTR handshaking input is connected to MPUGenIO0. Accessory power output
(VACC) is also fed through the DCE_DTR pin. Diode V489 prevents cable’s sig-
nal output to supply power to KL8, when main battery is not connected, and ac-
cessory power regulator to supply 3V directly to MADLinda’s input. Pullup R310
is thus needed to generate the high level state of DCE_DTR input to MPUGe-
nIO0.
(VACC) is also fed through the DCE_DTR pin. Diode V489 prevents cable’s sig-
nal output to supply power to KL8, when main battery is not connected, and ac-
cessory power regulator to supply 3V directly to MADLinda’s input. Pullup R310
is thus needed to generate the high level state of DCE_DTR input to MPUGe-
nIO0.
External Audio Interface
External audio signals, XMIC and XEAR, come from AUDIO_RFI block (see
p.38 ). An external headset accessory, car kit or loop set can be connected to
the external audio lines. External audio lines are also used to detect different
accessories.
p.38 ). An external headset accessory, car kit or loop set can be connected to
the external audio lines. External audio lines are also used to detect different
accessories.
Charger Interface
Charger voltage input line V_IN is connected through 1.5A fuse (F450) to
CHAPS (charger control) ASIC’s VCH inputs. Divided (47k/4k7) V_IN voltage
level is connected to CCONT’s VCHAR ADC input.
CHAPS (charger control) ASIC’s VCH inputs. Divided (47k/4k7) V_IN voltage
level is connected to CCONT’s VCHAR ADC input.