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2 pwm control register – FUJITSU MB91460 SERIES FR60 User Manual

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874

Chapter 43 Stepper Motor Controller

2.Registers

2.2 PWM Control Register

The PWM control register starts/stops the stepping motor controller, performs interrupt control
and performs setting of external output pins, etc., for the stepping motor controller.

PWM Control Register

[bit 7] Reserved bit

Always set the reserved bit to "0".

[bit 6 to 4] P2, P1, P0: Operating clock select bits (bits to select operating clock)

The P2, P1 and P0 bits specify the clock input signal for the PWM pulse generator.

Note:

After operation clock selection, set 1 in CE.

[bit 3] CE: Count enable bit

The CE bit enables operation of the PWM pulse generator. When "1" is set to the CE bit, the PWM pulse

generator starts its operating. The PWM2 pulse generator starts after the PWM1 pulse generator starts in

order to reduce the switching noise generated by the output driver.

When the CE bit is cleared to 0 during operation of the PWM pulse generator, the generator is initialized to

stop operating.

[bit 2] SC: 8/10 bits switching bit

When "1" is set to the SC bit, the PWM pulse generator operates at 10 bit. When "0" is set to the SC bit, the

P2

P1

P0

Clock input

PWM cycle (at F

cp

= 32 MHz)

PWM cycle (at F

cp

= 40 MHz)

SC=0

SC=1

SC=0

SC=1

0

0

0

F

CP

8.0 us

32.0 us

6.4 us

25.6 us

0

0

1

F

CP

/4

32.0 us

128.0 us

25.6 us

102.4 us

0

1

0

F

CP

/5

40.0 us

160.0 us

32.0 us

128.0 us

0

1

1

F

CP

/6

48.0 us

192.0 us

38.4 us

153.6 us

1

0

0

F

CP

/8

64.0 us

256.0 us

51.2 us

204.8 us

1

0

1

F

CP

/10

80.0 us

320.0 us

64.0 us

256.0 us

1

1

0

F

CP

/12

96.0 us

384.0 us

76.8 us

307.2 us

1

1

1

F

CP

/16

128.0 us

512.0 us

102.4 us

409.6 us

F

CP

: Peripheral clock CLKP

0x0C1, 0x0C3
0x0C5, 0x0C7
0x0C9, 0x0CB

Address

PWM Control register (PWC0, PWC1, PWC2, PWC3, PWC4, PWC5)

P2