Baseband Troubleshooting Instructions
CCS Technical Documentation
Page 12
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Nokia Corporation
Issue 1 10/02
X300 PIN 1
XRES
LCD reset,
see Figure 38, “X300 PIN 1: XRES (startup), UPP (D400 pin
A7) -> LCD CONNECTOR (X300 pin 1),” on page 30
UPP (D400) -> LCD CONECTOR (X300)
X300 PIN 2
XCS
LCD chip select,
see Figure 39, “X300 PIN 2: XCS, UPP (D400 pin C7) ->
LCD CONNECTOR (X300 pin 2),” on page 31
UPP (D400) -> LCD CONECTOR (X300)
X300 PIN 3
VSS
LCD ground
LCD CONECTOR (X300) -> PHONE GROUND
X300 PIN 4
SDA
LCD data,
see Figure 40, “X300 PIN 4: SDA, UPP (D400 pin B6) -> LCD
CONNECTOR (X300 pin 4),” on page 31
UPP (D400) -> LCD CONECTOR (X300)
X300 PIN 5
SCLK
LCD clock,
see Figure 41, “X300 PIN 5: SCLK, UPP (D400 pin C6) -> LCD
CONNECTOR (X300 pin 5),” on page 32
UPP (D400) -> LCD CONECTOR (X300)
X300 PIN 6
VDDI
LCD logic voltage supply 1.8 V
VIO 1.8 V -> LCD CONECTOR (X300)
X300 PIN 7
VDD
LCD voltage supply
VFLASH1 2.78 V -> LCD CONECTOR (X300)
X300 PIN 8
VOUT
Booster output,
see Figure 42, “X300 PIN 8: VOUT, LCD CONNECTOR
(X300 PIN 8) -> C301 and C302,” on page 32
LCD CONNECTOR (X300) -> C301 and C302
X303 PIN 2
KEYB_LIGHT
Keyboard backlight current,
see Figure 43, “X303 PIN 2: KEYB_LIGHT,
BACKLIGHT CIRCUITRY (V300 pin 6) -> UI CONNECTOR (X303 pin 2),”
BACKLIGHT CIRCUITRY (V300) -> UI CONNECTOR (X303)
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