GL843 GENESYS [GENESYS LOGIC], GL843 Datasheet - Page 48

• Manufacturer Part Number: GL843
• Description: High Speed USB 2.0 With ADF 2-in-1 Scanner Controller
• Manufacturer: GENESYS [GENESYS LOGIC]

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