User Guide

Baseband Troubleshooting Instructions CCS Technical Documentation
Page 12 ¤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),”
on page 33
BACKLIGHT CIRCUITRY (V300) -> UI CONNECTOR (X303)