Nokia NSB-9 Service Manual page 225

CCS Technical Documentation
CBUSENX CBUS selection and enable
VIO Power supply for LCD, UPP and flash
memory
VFLASH1 Power supply for LCD, IR and flash
memory
VANA Power supply for UEM (AD, RF and
audio codecs)
VCORE Power supply for UPP
DLIGHT DC/DC converter control
Signal Name Function
RESET Hagar reset
RF_BUSEN1 Hagar chip select and latch enable
XRES LCD reset
SI LCD serial data input
SCI LCD serial clock input
XCS LCD chip select
EXTRDX Flash memory read enable
FLSCSX Flash memory chip select
FLSCLK Flash memory clock in burst mode
EXTWRX Flash memory write enable
Signal Name Function
VBAT Battery voltage for UEM, power
amplifier, DC/DC converter, IR,
audio amp, keyboard leds and vibra
BTEMP Battery temperature, test mode
switch
FBUSRX FBUS from UEM to UPP
FBUSTX FBUS from UPP to UEM
UEMINT Interrupt request for UPP
DBUSDA DBUS clock
DBUSCLK DBUS data input/output
DBUSEN1X DBUS selection and enable
MBUSRX MBUS from UEM to UPP
MBUSTX MBUS from UPP to UEM
Issue 1 04/03
J408 1.8-0V, digital signal
C207 1.8V
C205 2.8V
C206 2.8V
C208 1.0-1.8V programmable
Converter
∼ ∼ ∼ ∼ VBAT
pin8
Test Point Signal Characteristics
J1 0 -1.8V, digital signal
J4 1.8-0V, digital signal
X300/2 1.8-0V, digital signal
X300/3 0 -1.8V, digital signal
X300/6 0 -1.8V, 3.25 MHz digital
clock signal
X300/5 1.8-0V, digital signal
J417 1.8-0V, digital signal
J420 1.8-0V, digital signal
J419 0 -1.8V, ∼ ∼ ∼ ∼ 35 MHz digital
clock signal
J416 1.8-0V, digital signal
Test Point Signal Characteristics
Battery 3.6V
connector
Battery
connector
and J102
J412 0 -1.8V, digital signal
J411 1.8-0V, digital signal
J405 0 -1.8V, digital signal
J414 0 -1.8V, digital signal
J413 0 -1.8V, 13 MHz digital
clock signal
J415 1.8-0V, digital signal
J410 1.8-0V, digital signal
J409 1.8-0V, digital signal
Nokia Corporation
Troubleshooting Instructions
Controlled by MCU
1.8 V used in NHM-4, initial value is 1.5V
Notes
Burst mode only when read
Notes
3.1V – 4.2V
Controlled by DSP
Controlled by DSP
Controlled by DSP
NSB-9
Page 51