m37905 Renesas Electronics Corporation., m37905 Datasheet - Page 234

• Manufacturer Part Number: m37905
• Description: Mitsubishi 16-bit Single-chip Microcomputer 7700 Family / 7900 Series
• Manufacturer: Renesas Electronics Corporation.

Fig. 10.2.15 Relationship between P6OUT
Fig. 10.2.14 Pins used in three-phase waveform mode
10.2.10 Three-phase waveform mode I/O pins
When the three-phase waveform mode is selected, port P6
waveform output pins, pin P6OUT
pin. Figure 10.2.14 shows the pins used in the three-phase waveform mode.
10.2.11 Pin P6OUT
When a falling edge is input to pin P6OUT
becomes “0”; and then the three-phase waveform output pins enter the floating state. (In other words, the
three-phase waveform output becomes inactive.)
When restarting the three-phase waveform output after this output becomes inactive, be sure to return the
input level at pin P6OUT
the input level at pin P6OUT
Also, at this time, bits 0 through 7 of the port P6 direction register (address 10
to section “5.2.4 Pin P6OUT
the port output pins, be sure to do as follows:
When the input level at pin P6OUT
Figure 10.2.15 shows the relationship between the P6OUT
phase waveform output pin.
Note that, when not inactivating the three-phase waveform output by using pin P6OUT
connect pin P6OUT
data.
these port pins to the output mode.
Write data to the port P6 register (address E
Return the input level at pin P6OUT
Set the port P6 direction register’s bits, corresponding to the port P6 pins in
waveform output pin
W-phase position data input
U-phase position data input
V-phase position data input
Waveform output control bit
(bit 7 at address A6
Three-phase waveform
output pin
P6OUT
CUT
CUT
(three-phase-waveform-output-forcibly-cutoff signal input pin)
to Vcc via a resistor.
CUT
CUT
input
When the three-phase waveform mode is selected, the three-phase waveform output pins enter the floating state.
Due to writing of “1” when the input level at pin P6OUT
Due to an input of a falling edge to P6OUT
to “H”; and then, be sure to set the waveform output control bit to “1.” When
CUT
CUT
16
/INT
)
is “L,” the waveform output control bit cannot be “1.”
CUT
P5
P5
P5
4
CUT
7
6
5
.”) Therefore, if it is necessary to switch port pins P6
/INT
/INT
/INT
becomes the three-phase-waveform-output-forcibly-cutoff signal input
7905 Group User’s Manual Rev.1.0
Programmable
I/O port
7
6
5
is “L,” each bit of the port P6 direction register cannot be “1.”
CUT
/TB2
/TB1
/TB0
THREE-PHASE WAVEFORM MODE
Three-phase waveform mode is selected (Bit 2 through 0 at address A6
IN
IN
IN
to “H” level.
/IDU
/IDV
/IDW
CUT
CUT
16
Floating
, the waveform output control bit (bit 7 at address A6
M37905
)’s bits, corresponding to the port P6 pins which will output
input, waveform output control bit, and three-phase
CUT
, this bit becomes “0.”
P6
P6
P6
waveform output
P6
Three-phase
P6
P6
0
2
4
/TA0
/TA1
/TA2
3
CUT
5
1
/TA1
/TA2
P6OUT
/TA0
= “H,” a pulse is output.
OUT
OUT
OUT
IN
CUT
IN
IN
/W/RTP0
/W/RTP0
/U/RTP1
/U/RTP0
/V/RTP1
/V/RTP0
CUT
0
input, waveform output control bit, and three-
/INT
Floating
through P6
1
0
3
2
1
0
4
U-phase waveform output
V-phase waveform output
W-phase waveform output
U-phase waveform output
V-phase waveform output
W-phase waveform output
Three-phase-waveform-output-
forcibly-cutoff signal input
Three-phase
waveform output
5
16
pins become the three-phase
= 100
10.2 Block description
16
) become “000000
2
)
, to “1” in order to set
0
CUT
through P6
, be sure to
2
.” (Refer
10-17
5
16
to
)