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GL843 Datasheet(PDF) 48 Page - GENESYS LOGIC

Part # GL843
Description  High Speed USB 2.0 With ADF 2-in-1 Scanner Controller
PDF  84 Pages
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Manufacturer  GENESYS [GENESYS LOGIC]
Direct Link  http://www.genesyslogic.com
Logo GENESYS - GENESYS LOGIC

GL843 Datasheet(HTML) 48 Page - GENESYS LOGIC

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GL843 High Speed USB2.0 With ADF 2-in-1 Scanner Controller For 3x
©2000-2006 Genesys Logic Inc. - All rights reserved.
Page 48
(1). Two table moving :
speed
Scanning position
buffer full position
b
d
a
c
time
(2). One table moving :
speed
Scanning position
buffer full position
b
d
a
c
time
{a+(b-1)} mode LPERIOD = Z2MOD
{c+(d-1)} mode LPERIOD = Z1MOD
For example, c (STEPNO = 4 steps for table 1)
= 60H,48H,30H,18H
d (FWDSTEP = 3 steps for moving)
= 18H,18H,18H
LPERIOD = 30H
Then Z1MOD = {(60H + 48H + 30H + 18H) + (18H +18H )} MOD {30H} = 00H
Note: If MCNTSET[1:0]=01 or 10 or 11,then (each step curve value + 1)/VCNT.
VCNT= system clocks per pixel / (MCNTSET+1).
Offset 66h ……..………………..………..………..….………..….…..…..…..…. Default value = 8’h00
PHFREQ7
PHFREQ6
PHFREQ5
PHFREQ4
PHFREQ3
PHFREQ2
PHFREQ1
PHFREQ0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
7-0 PHFREQ[7:0]
PWM frequency for motor phase of unipolar motors
Frequency: (system clock frequency)/[(PHFREQ+1)*4
Offset 67h ……..……..………………..………..….………..….…..………..…. Default value = 8’h7F
STEPSEL1 STEPSEL0 MTRPWM5 MTRPWM4 MTRPWM3 MTRPWM2 MTRPWM1 MTRPWM0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W



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