GL843 GENESYS [GENESYS LOGIC], GL843 Datasheet - Page 49

• 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 68h ……..……..………………..………..….………..….…..………..…. Default value = 8’h7F
Offset 69h ……..………………..………..………..….………..….…..…..…..…. Default value = 8’h00
7-6 STEPSEL[1:0] For type selection of table one, table two and table three in scanning mode.
5-0 MTRPWM[5:0] PWM duty cycle selection of table one, table two and table three of motor phase
7-6 FSTPSEL[1:0] For type selection of table four and table five in command mode.
5-0 FASTPWM[5:0] PWM duty cycle selection of table four and table five of motor phase of unipolar
7-0 FSHDEC[7:0]
FSTPSEL1 FSTPSEL0 FASTPWM5 FASTPWM4 FASTPWM3 FASTPWM2 FASTPWM1 FASTPWM0
FSHDEC7 FSHDEC6 FSHDEC5 FSHDEC4 FSHDEC3 FSHDEC2 FSHDEC1 FSHDEC0
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GL843 High Speed USB2.0 With ADF 2-in-1 Scanner Controller For 3x
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(1) For bipolar motors:
(2) For unipolar motors:
MTRPWM = 0 1/64 duty
Note: If PHFREQ < 0FH,then PWM setting must < (PHFREQ+1)*4
(1) For bipolar motors:
(2) For unipolar motors:
FASTPWM = 0 1/64 duty
Note: If PHFREQ < 0FH,then PWM setting must < (PHFREQ+1)*4
Deceleration steps after scanning finished (table three).
Note: It cannot be programmed to logic zero.
of unipolar motors in scanning mode.
motors in scanning mode.
10 Quarter step (for 2916, 6219, 3955, 3967).
11 Eighth step (for 3955, 3967).
10 Reserved.
11 Single-phase-on full step.
10 Quarter step (for 2916, 6219, 3955, 3967).
11 Eighth step (for 3955, 3967).
10 Reserved.
11 Single-phase-on full step.
00 Full step (for 1939, 1940, 2916, 6219, 3955, 3967).
01 Half step (for 1939, 1940, 2916, 6219, 3955, 3967).
00 Two-phase-on full step.
01 Half step.
00 Full step (for 1939, 1940, 2916, 6219, 3955, 3967).
01 Half step (for 1939, 1940, 2916, 6219, 3955, 3967).
00 Two-phase-on full step.
01 Half step.
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= 1 2/64 duty
= 2 3/64 duty
……
= 63 64/64 duty
= 1
= 2
……
= 63 64/64 duty
2/64 duty
3/64 duty
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Page 49
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