Table of Contents
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Pin Name
LCDD1
F11
LCDD2
A10
LCDD3
B10
LCDD4
D10
LCDD5
B9
LCDD6
E10
LCDD7
D9
GPIO24
A11
GPIO25
B11
Electrical Interface Between Baseband and Keypad
Introduction
The D2800 JUNO (BCM21351) BB ASIC uses it's GPIOs for the keypad interface. The keypad interface orients
the keys in rows and columns where GPIO[0:5] are used for rows 0 through 5 and GPIO[8:11] are used for
columns 0 through 3. The keypad is on a seperate PWB connected to the mainboard by connector X2420.
The GPIO I/O buffers on the D2800 JUNO are protected by the Z2400 EMI filter.
All GPIOs use 1.8V CMOS signaling levels.
Page 5 – 32
Pin
Figure 46 D2800 Baseband ASIC (BCM21351) Display Interface Pins
COMPANY CONFIDENTIAL
Copyright © 2010 Nokia. All rights reserved.
I/O
Type
O
CMOS
LCD Reset
I
CMOS
LCD Panel Tearing Effect
RM-497
System Module
Description
Issue 1
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Table of Contents
Troubleshooting
