Specifications

Functional Description
30-Dec-2010 CM-X300 Reference Guide Rev 1.31 37
Table 34 CPU GPIO DC Characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Unit
V
IL
Low level input
voltage
V
CC typ
= 3.2V
-0.3
–
0.2 x V
CC
V
V
IH
High level input
voltage
V
CC typ
= 3.2V
0.8 x V
CC
–
V
CC
+ 0.3
V
V
OH
High level output
voltage
I
OH
= -1.5 to -18 mA
0.9 x V
CC
–
V
CC
V
V
OL
Low level output
voltage
I
OH
= -1.25 to -15 mA
V
SS
–
0.1 x V
CC
V
R
PULLUP
,
R
PULLDO
WN
Pull-up and pull-
down resistance
20
45
100
kOhm
3.3.12 Camera Interface
The CM-X300 camera interface is represented by the CPU‘s Quick Capture Interface. It
connects the processor and a compatible external image-capture module, which consists of
a sensor providing RAW image data, a sensor with a minimal level of integrated processing
on RGB or YCbCr image data, or the combination of a sensor with more sophisticated
image-processing capability.
Note: The Camera Interface is available only in CM-X300 modules with PXA310
processor (C624M configuration).
The Quick Capture Interface operates in three modes:
 Preprocessed Still-Image/Video Capture mode. Supports image sensors and camera
modules that provide some level of preprocessing. The image data is in YCbCr 4:2:2
color space. The image data is captured through various interface options, optionally
scaled and/or bit sliced, and then formatted and packed before it is presented to
system memory resources.
 RAW Still-Image Capture mode. Captures and formats image data to be processed
using algorithms targeting display or print quality. The image data is in the four
element Bayer pattern of RGGB color space. The data is captured through the
various interface options, optionally corrected for dead pixels, companded, black-
level clamped, and then packed before it is presented to memory resources.
 RAW Video-Image Capture mode. Offers the digital viewfinder function and the
video-clip capture function at a CIF, QCIF, SIF, or QSIF resolution. The sensor
provides image data in the RAW RGGB color. The integrated pixel processing chain
supports the conversion to RGB 8:8:8 and YCbCr 4:2:2 (and YCbCr 4:2:0 for
PXA31x processor) color space through several functional units, which include:
 Spatial scaling unit (SSU)
 Pixel substitution unit (PSU)
 Companding/black-level clamp/gamma correction unit (CGU)
 Color synthesis unit (CSU)
 Color management unit (color space conversion and correction) (CMU)
Table 35 Camera Interface Signals
CM-X300 Signal
Name
Type
Description
CIF_DD[9:0]
I
Data lines to transmit 8 or 10 bits of data at a time. These pins may be
defined as GPIO[48..39] in a camera-less application.
CIF_MCLK
O
Programmable clock output used by the image sensor.
This pin may be defined as GPIO49 in a camera-less application.
CIF_PCLK
I
Pixel clock used by the Quick Capture Interface to clock the pixel data into
the input FIFO.
This pin may be defined as GPIO50 in a camera-less application.