GL646USB datasheet(37/43 Pages) ETC

37 / 43 page

Revision 1.3

Mar.22 2001

-36-

GL646USB

note: If PHFREQ < 0FH,then PWM setting must < (PHFREQ+1)*4

7.63. Reg :66H,67H

(Write)

Defalut : 00H,00H

GPO[12:7]

: GPO12~7 outputs ports

GPO[6:1]

: GPO6~1 outputs ports

7.64. Reg :68H,69H

(Write)

Defalut : 00H,00H

GPOE[12:7]

: GPO12~7 ports output enable set.

GPOE[6:1]

: GPO6~1 ports output enable set.

Set ‘1’ : output.

Reset ‘0’ : input.

GPOM12~11 : to select GPIO12~11 as Bi-polar motor driver V-ref input voltage in

order to control drive current.

7.65. Reg :6AH

(Write)

Defalut : 00H

FSTPSEL[1:0] : for table two fast moving step type selection.

(1).bi-polar :

a.00: full step.

b.01: half step.

c.10: quarter step.

d.11: reserved.

(2).uni-polar :

a.00: two-phase-on full step.

b.01: half step.

c.10: reserved.

d.11: single-phase-on full step.

FASTPWM[5:0]

: to set PWM duty cycle for table two motor phase of uni-polar.

FASTPWM

1/64 duty

2/64 duty

3/64 duty

……

=63

64/64 duty

note: If PHFREQ < 0FH,then PWM setting must < (PHFREQ+1)*4

7.66. Reg :6BH

(Write)

Defalut : 00H

FMOVNO[7:0]: Set fast moving slop steps(table two slope).

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