M37733S4BFP datasheet(7/36 Pages) MITSUBISHI

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MITSUBISHI MICROCOMPUTERS

M37733S4BFP

16-BIT CMOS MICROCOMPUTER

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product

Pulse output port mode

The pulse motor drive waveform can be output by using plural internal

timer A.

Figure 3 shows a block diagram for pulse output port mode. In the

pulse output port mode, two pairs of four-bit pulse output ports are

used. Whether using pulse output port or not can be selected by

waveform output selection bit (bit 0, bit 1) of waveform output mode

output selection bit is set to “1”, RTP10, RTP11, RTP12, and RTP13

are used as pulse output ports, and when bit 1 of waveform output

selection bit is set to “1”, RTP00, RTP01, RTP02, and RTP03 are

used as pulse output ports. When bits 1 and 0 of waveform output

selection bit are set to “1”, RTP10, RTP11, RTP12, and RTP13, and

RTP00, RTP01, RTP02, and RTP03 are used as pulse output ports.

The ports not used as pulse output ports can be used as normal

parallel ports, timer input/output or key input interruput input.

In the pulse output port mode, set timers A0 and A2 to timer mode as

timers A0 and A2 are used. Figure 5 shows the bit configuration of

timer A0, A2 mode registers in pulse output port mode.

Data can be set in each bit of the pulse output data register

corresponding to four ports selected as pulse output ports. Figure 6

shows the bit configuration of the pulse output data register. The

contents of the pulse output data register 1 (low-order four bits of

1C16 address) corresponding to RTP10, RTP11, RTP12, and RTP13

is output to the ports each time the counter of timer A2 becomes

000016. The contents of the pulse output data register 0 (low-order

four bits of 1D16 address) corresponding to RTP00, RTP01, RTP02,

and RTP03 is output to the ports each time the counter of timer A0

becomes 000016.

Figure 7 shows example of waveforms in pulse output port mode.

When “0” is written to a specified bit of the pulse output data register,

“L” level is output to the corresponding pulse output port when the

counter of corresponding timer becomes 000016, and when “1” is

written, “H” level is output to the pulse output port.

Pulse width modulation can be applied to each pulse output port.

Since pulse width modulation involves the use of timers A1 and A3,

activate these timers in pulse width modulation mode.

Fig. 3 Block diagram for pulse output port mode

Timer A2

Pulse width modulation output

by timer A3

Pulse width modulation output

by timer A1

D11

D10

Timer A0

Pulse output data

Pulse width modulation selection bit

(Bit 4, 5 of 6216 address)

RTP13 (P57)

RTP12 (P56)

RTP11

(P55)

RTP10 (P54)

RTP03 (P53)

RTP02 (P52)

RTP01 (P51)

RTP00 (P50)

Polarity selection bit

(Bit 3 of 6216 address)

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