Canon Scanner XRD9829REF User Manual

July 1998-2  
XRD9829REF  
USER MANUAL  
CIS 30-BIT COLOR SINGLE LINE SCANNER  
EXAR Corporation, 48720KatoRoad, Fremont, CA94538(510)668-7000FAX(510)668-7017  
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XRD9829REF  
DATA  
FLIP-  
FLOP  
FIFO  
SRAM  
DATA  
CIS OUTPUT  
PARALLEL  
PORT DB25  
CONNECTOR  
DATA  
XRD9829  
5-BIT BUS NIBBLE  
1.25V  
DC  
INTEL 486 Compatible  
FLIP-  
FLOP  
FIFO  
SRAM  
DATA  
DATA  
XRD9829 CONTROL SIGNALS  
MACH435 CPLD  
CIS CONTROL SIGNALS  
PARALLEL PORT CONTROL  
Figure 1. Block Diagram of XRD9829REF  
TheXRD9829isacompletelinearCISorCCDsensorsignalprocessoronasinglemonolithic  
chip. The XRD9829 includes a high speed 10-Bit ADC, a 6-Bit Programmable Gain Amplifier  
withgainadjustmentof1to10andan8-Bitprogrammableinputreferredoffsetcalibrationrange  
of 800 mV. See the XRD9829EVAL User Manual / PCB board for evaluating the XRD9829  
CIS / CCD signal processor chip.  
Rev.1.00  
3
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XRD9829REF  
AVDD  
Power  
Down  
VIN0  
DVDD  
VIN1  
VIN2  
VIN3  
4-1  
+
_
MUX  
VRT  
VREF+  
BUFFER  
10  
5
DATA  
OUT  
10-BIT  
ADC  
RL  
PGA  
DB4:0 / DB9:5  
DGND  
PORT  
V
V
DCEXT  
DCREF  
VRB  
INT/EXT_V  
DCREF  
6
G<5:0>  
6-BIT GAIN  
REGISTER  
CLP  
AVDD  
AGND  
Power  
Down  
MUX SEL  
DC/AC  
AGND  
8-BIT DAC  
AGND  
8
O<7:0>  
CIS/CCD  
ADCCLK  
PDB  
8-BIT OFFSET  
REGISTER  
VRT  
CCD  
SCLK  
SDATA  
LD  
CIS  
CONTROL LOGIC  
Figure 2. Functional Block Diagram of XRD9829  
OPERATIONALPROCEDURE  
The routine listed below will first calibrate the photo response of the CIS using the XRD9829.  
Aftercalibration,theXRD9829REFcanbeusedtoscananycolortargettoshowCISnon-color  
corrected response. (Color correction is typically done in the digital asic.)  
HowtoRuntheXRD9829REFDemonstration:  
1. Make sure the computer is powered off and the AC power adapter is disconnected from a  
wall outlet  
2. Connect the parallel port cable to the printer port of the computer  
3. Connect the AC power adapter into a wall outlet  
4. Turn on the computer and activate Windows 95  
LoadingEXARSoftware  
5. Load the diskette labeled ScanIt 1.0 Disk # 1 into the floppy drive  
6. Select the Start menu in the program manager and choose RUN  
7. Inside the small pop-up window, type: A:\setup  
8. Follow the instructions to finish software installation  
Rev.1.00  
4
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XRD9829REF  
ParallelPortConfigurations  
9. Confirm the parallel port address as follows:  
a. Select the Start Menu, choose Settings, then choose Control Panel  
b. From the Control Panel window which pops up, double-click on System  
c. In the System Properties window, select Device Manager  
d. From the Device Manager window, double-click on Ports (COM & LPT)  
e. Double-click on Printer Port (LPT1). If you can not find it, please goto Step 10  
f. From the pop-up window, select Resources  
g. Verify the Input/Output Range is set to 0378 - 037F  
h. If the range is not correct, clear the Use Automatic Settings check box by  
clicking it  
i. Choose correct address which is 0378 by default and click OK  
j. Re-start the computer as advised  
10. If you do not have a Printer Port configured on your computer, please follow the steps  
listed below:  
a. From the Control Panel window which pops up, double-click on Add New Hardware  
b. From the pop-up window, click the Next > button  
c. Select ‘No’ when prompted for ‘Do you want Windows to search for your new  
hardware?’, then click the Next > button  
d. Choose Ports (COM & LPT), then click the Next > button  
e. Choose Printer Port, then click the Next > button  
f. Make a note of the Input/Output Range of Printer Port of your computer and click  
OK.  
g. You will use these values later when configure the ScanIt software  
h. Re-start the computer as advised  
OffsetAdjustmentWithaBlackTarget  
11. Set the dip switches located on the side panel of the scanner to 1100010000 as shown  
in Figure 2 and push the Serial Port button which is located on the front panel of the  
demo system. This will reset the XRD9829.  
Rev.1.00  
5
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XRD9829REF  
S S D D D D D D D D  
1
0
7
6
5
4
3
2
1
0
1
0
Figure 3. Dip Switches Set to Value 1100010000 to Reset the XRD9829  
Rev.1.00  
6
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XRD9829REF  
ControlRegisters  
Function  
(Register  
S1/S0)  
D7  
D6  
D5  
D4  
D3  
D2  
D1  
D0  
Power-up  
State  
(Note 1)  
Gain  
(00)  
G5  
O7  
G4  
O6  
G3  
O5  
G2  
O4  
G1  
O3  
G0  
O2  
X
X
000000XX  
01000000  
(MSB)  
(LSB)  
Offset  
O1  
O0  
(01)  
(MSB)  
X
(LSB)  
Mode  
X
VRT  
INPUTDC  
DC/AC  
CIS/CCD  
MUXSEL  
MUXSEL  
XX000000  
(10)  
0:INTERNAL  
1:EXTERNAL  
0:INTERNAL  
REFERENCE  
0: DC  
1: AC  
0: CIS  
1:CCD  
(VDCREF  
)
0 0: VIN0  
0 0: VIN0  
(VDCREF  
AGND)  
=
0 1: VIN1  
1 0: VIN2  
0 1: VIN1  
1 0: VIN2  
1:EXTERNAL  
1 1: VIN3  
TEST2  
1 1: VIN3  
(VDCREF=VDCEXT  
)
Mode  
&Test  
(11)  
X
X
X
DIGITALRESET  
TEST3  
TEST1  
X
XXX0000X  
0: NO RESET  
1:RESET  
0:TEST3  
DISABLED  
0:TEST2  
DISABLED  
0:TEST1  
DISABLED  
1: VIN1 PIN  
TIEDTO  
(REGISTERSARE  
RESETTO  
1:OUTPUT  
OFBUFFER  
TIEDTOVIN3  
PIN (VIN3 PIN  
(VIN2 PIN  
1:OUTPUT  
OF PGA  
POWER-UP  
STATES)  
TIEDTO  
INPUTOF  
ADC  
VIN2 PIN  
BECOMES  
(PGAOUTPUT  
DISCONNECTED  
FROMINPUT  
ANOUTPUT)  
BECOMES  
ANOUTPUT)  
OFADC)  
Table 1. Control Register Description for XRD9829  
Note:  
1These are the control register settings upon initial power–up. The previous register settings are retained following a  
logic power-down initiated by the PDB signal.  
Rev.1.00  
7
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XRD9829REF  
12. Select the Start Menu, choose Programs, then choose XRD9829REF icon  
13. A window will pop up as shown below. The upper window shows the Plot of Captured  
Data and the lower window shows the Histogram of data. Figure 3 shows the pop-  
up window when ScanIt is first  
e
Figure 4. ScanIt Software Window Before Scanning  
14. Select SETUP from the pull-down menu and choose I/O ADDRESS. In the window  
thatpops up, type in the Input/Output Range of Printer Port of your computer. The  
default setting is 378H.  
Rev.1.00  
8
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XRD9829REF  
15. Pick the black target out from the kit and put it on a flat area. Place the XRD9829REF  
on top of the black target with the CIS sensor facing downwards. From the CAPTURE  
menu select SNAP SHOT for a single line scan of the black target with the dip  
switches set to zero. A typical result of a black target scan is shown below:  
Figure 5. Non-calibrated Black Target Scan  
16. Set the dip switches to 1000010000 to select the external DC reference for the 1.25V  
global offset adjustment. Push the Serial Port button. The XRD9829 will subtract  
whatever voltage appears on Pin 16, in this case, 1.25V, from the input. From the  
CAPTURE menu select SNAP SHOT. A typical result of the global offset adjustment  
is shown below. Please notice that the black code value has moved down.  
Rev.1.00  
9
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XRD9829REF  
Figure 6. Black Target Scan After Global Offset Adjust  
Rev.1.00  
10  
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XRD9829REF  
XRD9829  
VDD  
VIN0 - VIN2  
VRT  
C
I
S
VIN0  
VIN3  
RL  
5V  
100K  
34K  
VRB  
Figure 7. Simplified Block Diagram Showing Global Offset Adjustment by XRD9829  
UsingExternalResistorLadder  
17. Set the dip switches to 0111000000 to select the internal offset DAC for fine offset  
adjustment. Push the Serial Port button. From the CAPTURE menu select SNAP  
SHOT. The offset should now move the output of the CIS to almost zero scale.  
Please refer to data sheet for offset adjustment. A typical result of the fine offset  
adjustment is shown below.  
Rev.1.00  
11  
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XRD9829REF  
Figure 8. Black Target Scan After Global and Fine Adjust  
Rev.1.00  
12  
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XRD9829REF  
XRD9829  
VDD  
VRT  
C
I
VIN0  
RL  
S
8-Bit Offset  
DAC  
VRB  
Figure 9. Simplified Block Diagram Showing Fine Offset Adjustment by XRD9829  
18. Switch the black target to the enclosed white target. From the CAPTURE menu select  
SNAP SHOT for a single line scan of the white target. A typical result of a white  
target is shown below.  
Rev.1.00  
13  
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XRD9829REF  
Figure 10. White Target Scan Without Gain Adjustment  
19. Set the dip switches to 0000000100 to select the desired gain. Push the Serial Port  
button. From the CAPTURE menu select SNAP SHOT. The gain should move the  
output of the CIS to almost full scale. Please refer to data sheet for further gain  
adjustment and optimal values of dip switches for your scanner. A typical result of the  
white target with gain adjustment is shown below.  
Rev.1.00  
14  
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XRD9829REF  
Figure 11. White Target Scan After Gain Adjustment  
Rev.1.00  
15  
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XRD9829REF  
XRD9829  
VDD  
VRT  
VIN0  
C
I
RL  
PGA  
S
VRB  
6-Bit Gain Register  
Figure 12. Simplied Block Diagram Showing Gain Adjustment by XRD9829  
20. Once the XRD9829 has been fully calibrated, any target can be scanned. For  
example: Scan a gray scale to demonstrate the stair step response or a color  
target for color responsitivity  
Rev.1.00  
16  
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XRD9829REF  
Figure 13. Gray-scale Target Scan  
Important:  
1. If at any time an unexpected result is shown or the demo system seems to not  
working, please pull the AC adapter out from the wall outlet to cycle power. Start the  
procedures again from Step 11.  
2. Keep the scanner away from other electrical equipment, power cords, light dimmers  
etc. as stray electrical fields can end up in the digitized data.  
Rev.1.00  
17  
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SchematicsforXRD9829REF  
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XRD9829REF  
Notes  
Rev.1.00  
21  
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XRD9829REF  
Notes  
Rev.1.00  
22  
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XRD9829REF  
Notes  
Rev.1.00  
23  
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XRD9829REF  
NOTICE  
EXAR Corporation reserves the right to make changes to the products contained in this publication in order to  
improve design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any  
circuits described herein, conveys no license under any patent or other right, and makes no representation that  
the circuits are free of patent infringement. Charts and schedules contained here in are only for illustration  
purposes and may vary depending upon a user’s specific application. While the information in this publication  
has been carefully checked; no responsibility, however, is assumed for in accuracies.  
EXAR Corporation does not recommend the use of any of its products in life support applications where the  
failure or malfunction of the product can reasonably be expected to cause failure of the life support system or to  
significantly affect its safety or effectiveness. Products are not authorized for use in such applications unless  
EXAR Corporation receives, in writing, assurances to its satisfaction that: (a) the risk of injury or damage has  
been minimized; (b) the user assumes all such risks; (c) potential liability of EXAR Corporation is adequately  
protected under the circumstances.  
Copyright1998EXARCorporation  
Datasheet July 1998  
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.  
Rev.1.00  
24  
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