User Guide

Camera Module CCS Technical Documentation
Page 6 ¤Nokia Corporation Issue 2 11/02
Figure 1: Block diagram of camera module
Signal description
The following description indicates the meaning of each signal shown in figure above.
(1) VDD Supply voltage to the main circuits of a camera module
(2) GND2 Ground line corresponding to VDD
(3) D + Fast serial data out
(4) VDDI Supply voltage to sub LVDS circuit. This voltage can be always applied,
even if the Vctrl is off.
(5) D - Fast serial data out of which is inverted to D+
(6) SDA Serial data line of CCI bus
(7) GND1 Ground line corresponding to VDDI
(8) SCL Serial clock line of CCI bus
(9) Clk + Fast serial clock
(10) Vctrl This signal is used for sub LVDS circuit to be shut off in order to reduce
stand-by current of a camera module. “High” designates “ON”. Please
see the operation flow chart.
(11) Clk - Fast serial data out of which is inverted to Clk+
(12) GND3 Ground line corresponding to Extclk.
(13) Extclk System clock from Nokia engine to the camera module. This signal is
sinusoidal by RC filtering on Nokia engine. Extclk is AC coupled to the
camera module through a capacitor of which capacitance is more than
Image
Section
TG
CDS/AGC
ADC
SG
Signal
Processing
Format
Converter
Sub LVDSPLL/VCO
Single lens
CCI bus
I/F
Nokia Engine
VGA CMOS sensor Camera DSP
V
GA2 Camera Module
2
2
43
0.01
uF
Spring connector