M37754 Mitsubishi, M37754 Datasheet - Page 38

• Manufacturer Part Number: M37754
• Description: SINGLE-CHIP 16BIT CMOS MICROCOMPUTER
• Manufacturer: Mitsubishi

When writing data to the dead-time timer (address 1B
written to the reload register shared by three dead-time timers.
When the dead-time timers catch the start trigger from the respec-
tive timers, the reload register contents are transferred to its counter
and the dead-time timer decrements with the clock source selected
by bits 6 and 7 of pulse output data register (address 1C
ally, this timer can accept another trigger before completion of the
preceding trigger operation. In this case, after transferring the reload
register contents to the dead-time timer at acceptance of the trigger,
the value is decremented.
The dead-time timer operates as a one-shot timer. Accordingly, this
timer starts pulse output when the trigger is caught, and finishes
pulse output and stops operation when its contents become “00
and waits next trigger.
Fig. 44 Bit configuration of pulse output data registers 1 and 0 in three-phase waveform mode
38
7
6
5
4
3
2
1
0
Pulse output data register 1
V-phase output polarity set buffer
(Three-phase mode 0)
Interrupt request interval set bit
(Three-phase mode 1)
U-phase output polarity set buffer
(Three-phase mode 0)
Interrupt validity output select bit
(Three-phase mode 1)
“H” output of V-phase fix buffer
Clock-source-of-dead-time timer select bits
00 : Pf
01 : Pf
10 : Pf
11 : Do not select.
“H” output of W-phase fix buffer
“H” output of U-phase fix buffer
0 : “H” output
1 : “L” output
0 : At every second time
1 : At every fourth time
0 : “H” output
1 : “L” output
0 : Timer B2 interrupt request generated at each
1 : Timer B2 interrupt request generated at each
0 : Released from fixed output
1 : “H” output fixed
0 : Released from fixed output
1 : “H” output fixed
0 : Released from fixed output
1 : “H” output fixed
: Not used in three-phase waveform mode
even-numbered underflow of timer B2.
odd-numbered underflow of timer B2.
2
4
8
selected
selected
selected
Address
16
1C
M37754M8C-XXXGP, M37754M8C-XXXHP
16
), the data is
16
). Addition-
16
”,
Note : Only when bit 5 of the particular function select register 1 (in Fig. 15)
7
In the three-phase waveform mode, setting bit 7 of the waveform out-
put mode register (address 1A
(U, V, W phases) and their negative waveforms (U, V, W phases)
output from the respective ports. When that bit is “0”, their ports are
floating. That bit is cleared to “0” by inputting falling edge to the INT
pin or reset other than clearing by an instruction..
Additionally, setting bits 5 to 3 of the pulse output data register 1 (ad-
dress 1C
fixed to “H”, and setting bits 7 to 5 of the pulse output data register 0
(address 1D
fixed to “H”.
When selecting the three-phase waveform mode, INT
input-only pin.
6
M37754S4CGP, M37754S4CHP
is set to “1”, these registers’ contents can be changed from the status
during reset (in Fig.76).
5
4
16
3
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
) to “1” makes the corresponding positive waveforms
16
2
) to “1” makes the corresponding negative waveforms
1
0
MITSUBISHI MICROCOMPUTERS
Pulse output data register 0
(Valid in three-phase mode 0)
W-phase output polarity set buffer
“H” output of W-phase fix buffer
“H” output of V-phase fix buffer
“H” output of U-phase fix buffer
0 : “H” output
1 : “L” output
0 : Released from fixed output
1 : “H” output fixed
0 : Released from fixed output
1 : “H” output fixed
0 : Released from fixed output
1 : “H” output fixed
: Not used in three-phase waveform mode
16
) to “1” makes positive waveforms
____
_
Address
_
0
1D
pin become
__
16
____
0