MITSUBISHI MICROCOMPUTERS
M37754M8C-XXXGP, M37754M8C-XXXHP
M37754S4CGP, M37754S4CHP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Additionally, pulse width modulation can be applied for the pulse out-
The polarity select bit (bit 3) of waveform output mode register must
be “0” to select the positive polarity. The other operations are the
same as that of pulse mode 0. Figure 53 shows example waveforms
in the pulse mode 1.
put port RTP1. Because the timerA2 is used for pulse width modula-
tion, actuate timer A2 in the pulse width modulation mode. When any
bit of pulse output data is “1”, the pulse to which pulse width modula-
tion is applied is output from the pulse output port when the contents
of timer A1 counter become 000016.
In ports selecting the pulse mode 1, output of RTP01 and RTP00 is
controlled by the waveform output control bit 0 (bit 6) of waveform
output mode register; output of RTP13, RTP12, RTP11, RTP10,
RTP03 and RTP02 is done by the waveform output control bit 1
(bit 7).
Pulse width modulation by timer A2 is applied when setting the pulse
width modulation select bit 0 (bit 4) of waveform output mode regis-
ter to “1”, pulse width modulation select bit 1 (bit 5) to “0,” and the
pulse width modulation data bit of RTP1 (bit 5) of pulse output data
register 0 to “1”.
When setting the waveform output control bit to “1”, waveform is out-
put from the corresponding port. When clearing that bit to “0”, wave-
form output from the corresponding port stops and the port becomes
floating. The waveform output control bits are cleared to “0” by reset
other than clearing with instructions.
RTP03, RTP02, RTP01 and RTP00 can output the contents of pulse
output data register 0 by setting the polarity select bit (bit 3) of wave-
form output mode register. When the polarity select bit is “1”, the re-
versed contents of pulse output data register 0 is output; when that
bit is “0”, the contents of pulse output data register 0 are output as it
is. Figure 52 shows example waveforms in the pulse mode 0.
In ports selecting the pulse mode 0, output of RTP03, RTP02, RTP01
and RTP00 is controlled by the waveform output control bit 0 (bit 6)
of waveform output mode register; output of RTP13, RTP12, RTP11
and RTP10 is done by the waveform output control bit 1 (bit 7).
When setting the waveform output control bit to “1”, waveform is out-
put from the corresponding port. When clearing that bit to “0”, wave-
form output from the corresponding port stops, and the port
becomes floating. The waveform output control bits are cleared to “0”
by reset other than clearing with instructions.
Address
Pulse output data register 1
7
×
6
×
5
×
4
3
2
1
0
1C16
RTP1
RTP1
RTP1
RTP1
0
1
2
3
pulse output data bit
pulse output data bit
pulse output data bit
pulse output data bit
Pulse output mode select bit
0 : Pulse mode 0
1 : Pulse mode 1
✕
: Not used in pulse output port mode
7
6
5
4
3
2
1
0
Address
Pulse output data register 0
Pulse mode 1
1D16
This mode divides a pulse output port into 6 bits and 2 bits, and indi-
vidually controls them.
RTP0
RTP0
RTP0
RTP0
0
1
2
3
pulse output data bit
pulse output data bit
pulse output data bit
pulse output data bit
When setting the pulse output mode select bit to “1”, and setting bit 2
to “0” and bits 1 and 0 to “1” of the waveform output select bits, the
following two groups become the pulse output ports:
In pulse mode 0
Pulse width modulation data bit of RTP1
In pulse mode 1
Pulse width modulation data bit of
•Six of RTP13, RTP12, RTP11, RTP10, RTP03, RTP02
•Two of RTP01, RTP00.
RTP03, RTP02
Timer A1 controls six of RTP13, RTP12, RTP11, RTP10, RTP03, and
RTP02; timer A0 controls two of RTP01, RTP00.
In pulse mode 1
Pulse width modulation data bit of
Additionally, pulse width modulation can be applied for the pulse out-
put ports (RTP1, RTP03, RTP02). The pulse width modulation select
bit 1 (bit 5) of waveform output mode register selects the type of
modulation: the common modulation to six of RTP13, RTP12, RTP11,
RTP10, RTP03 and RTP02 or the modulation to every two ports of
RTP13 and RTP12, RTP11 and RTP10, RTP03 and RTP02.
When setting that bit to “0”, the common modulation to six ports is
applied; when setting that bit to “1”, the modulation to every two ports
is applied. The timer A2 is used for the common modulation to six
ports; the timers A2, A3 andA4 are used for the modulation to every
two ports. Accordingly, actuate the respective timers in the pulse
width modulation mode. When any bit of pulse output data is “1”, the
pulse to which pulse width modulation is applied is output from the
pulse output port when the contents of timer A1 counter become
000016.
RTP11, RTP10
In pulse mode 1
Pulse width modulation data bit of
RTP1 , RTP1
3
2
Note : Only when bit 5 of the particular function select register 1
(in Fig. 15) is set to “1”, this register’s contents can be
changed from the status after reset (in Fig.76).
Fig. 51 Bit configuration of pulse output data registers 1 and 0 in
pulse output port mode
Pulse width modulation by corresponding timers is applied when set-
ting the pulse width modulation select bit 0 of waveform output mode
register to “1” and the corresponding pulse width modulation data
bits (bits 7 to 5) of pulse output data register 0 to “1”.
44
RENESAS [ RENESAS TECHNOLOGY CORP ]
