m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 195
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m37905
Manufacturer Part Number
m37905
Description
Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M37905.pdf
(565 pages)
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PULSE OUTPUT PORT MODE
9.2 Block description of pulse output port 0
Fig. 9.2.7 Relationship between P6OUT
9-14
9.2.5 Pin P6OUT
When a falling edge is input to pin P6OUT
becomes “0” and the pulse output pins enter the floating state. (In other words, pulse output becomes
disabled.) The pulse output pins where pulse output is to be inactive depend on the pulse output mode.
When restarting pulse output after the pulse output becomes inactive, be sure to return the input level at
pin P6OUT
level at pin P6OUT
Also, at this time, bits 0 through 7 of the port P6 direction register (address 10
(Refer to section “5.2.4 Pin P6OUT
P6
When the input level at pin P6OUT
Figure 9.2.7 shows the relationship between the P6OUT
output pin.
Note that, when not making the pulse output inactive by using pin P6OUT
P6OUT
• Pulse mode 0: RTP0
• Pulse mode 1: RTP0
7
to port output pins, be sure to do as follows:
Return the input level at pin P6OUT
Write data to the port P6 register (address E
Set the port P6 direction register’s bits, corresponding to the port P6 pins in
output data.
these port pins to the output mode.
CUT
to Vcc via a resistor.
CUT
Waveform output control bit 1
(bit 7 at address A6
Pulse output pin
P6OUT
to “H” level; and then, be sure to set the waveform output control bit 1 to “1.” When the input
CUT
CUT
CUT
(pulse-output-cutoff signal input pin)
When the pulse output port mode is selected, the pulse outpit pins become floating.
The pulse is output by writing of “1” with the input level at pin P6OUT
When a falling edge is input to pin P6OUT
is “L” level, the waveform output control bit 1 cannot be “1.”
input
0
0
to RTP0
to RTP0
16
)
3
3
CUT
Programmable
I/O port
CUT
, RTP1
7905 Group User’s Manual Rev.1.0
/INT
Selection of pulse output port mode
(selected by bit s 3 to 0 at address A6
is “L” level, no bit of the port P6 direction register can be “1.”
CUT
CUT
4
0
.”) Therefore, if it is necessary to switch port pins P6
input, waveform output control bit 1, and pulse output pin
CUT
, RTP1
to “H” level.
, the waveform output control bit 1 (bit 7 at address A6
Floating
16
1
)’s bits, corresponding to the port P6 pins which will
CUT
, this bit becomes “0.”
CUT
Pulse output
input, waveform output control bit 1, and pulse
16
)
CUT
Floating
= “H.”
CUT
, be sure to connect pin
16
) become “00000000
, to “1” in order to set
Pulse output
0
through
16
2
.”
)
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