M30622SAFP MITSUBISHI [Mitsubishi Electric Semiconductor], M30622SAFP Datasheet - Page 94

• Manufacturer Part Number: M30622SAFP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

Timers’ functions for three-phase motor control
94
Timers’ functions for three-phase motor control
Figure 1.15.1. Registers related to timers for three-phase motor control
Use of more than one built-in timer A and timer B provides the means of outputting three-phase motor
driving waveforms.
Figures 1.15.1 to 1.15.3 show registers related to timers for three-phase motor control.
Note 1:
Note 2:
Note 3:
Note 4:
T
Three-phase PWM control register 0
b7 b6 b5 b4 b3 b2 b1 b0
b7 b6 b5 b4 b3 b2 b1 b0
hree-phase PWM control register 1
No value other than “0” can be written.
Selecting three-phase PWM output mode causes P8
timer for setting short circuit prevention time, the U, V, W phase output control circuits, and the circuit for setting timer B2 interrupt
frequency.
In triangular wave modulation mode:
The short circuit prevention timer starts in synchronization with the falling edge of timer Ai output.
The data transfer from the three-phase buffer register to the three-phase output shift register is made only once in synchronization
with the transfer trigger signal after writing to the three-phase output buffer register.
In sawtooth wave modulation mode:
The short circuit prevention timer starts in synchronization with the falling edge of timer A output and with the transfer trigger signal.
The data transfer from the three-phase output buffer register to the three-phase output shift register is made with respect to every
transfer trigger.
To write “1” both to bit 0 (INV00) and bit 1 (INV01) of the three-phase PWM control register, set in advance the content of the timer
B2 interrupt occurrences frequency set counter.
0
Note : To use three-phase PWM output mode, write “1” to INV12.
Noting is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
Noting is assigned.
In an attempt to write to this bit, write “0”. The value, if read, turns out to be “0”.
Bit symbol
Bit symbol
Reserved bit
INV10
INV11
INV12
INV00
INV01
INV02
INV03
INV04
INV05
INV06
INV07
Symbol
Symbol
INVC1
INVC0
Positive and negative
phases concurrent L
output disable function
enable bit
Effective interrupt output
polarity select bit
(Note4)
Effective interrupt output
specification bit
(Note4)
Mode select bit
(Note 2)
Output control
bit
Positive and negative
phases concurrent L
output detect flag
Modulation mode select
bit (Note 3)
Software trigger bit
Timer Ai start trigger
signal select bit
Timer A1-1, A2-1, A4-1
control bit
Short circuit timer count
source select bit
Bit name
Bit name
Address
Address
0348
0349
0
, P8
16
16
1
, and P7
0: Not specified.
1: Selected by the effective interrupt output
0: Output disabled
1: Output enabled
0: Feature disabled
1: Feature enabled
0: Triangular wave modulation mode
1: Sawtooth wave modulation mode
1: Trigger generated
When reset
0: A timer B2 interrupt occurs when the timer
1: A timer B2 interrupt occurs when the timer
0: Normal mode
1: Three-phase PWM output mode
0: Not detected yet
1: Already detected
When reset
0: Timer B2 overflow signal
1: Timer B2 overflow signal,
0: Three-phase mode 0
1: Three-phase mode 1
Always set to “0”
0 : Not to be used
1 : f
A1 reload control signal is “1”.
A1 reload control signal is “0”.
The value, when read, is “0”.
polarity selection bit.
signal for writing to timer B2
2
00
00
1
Effective only in three-phase mode 1
/2 (Note)
Effective only in three-phase mode 1
through P7
16
16
Description
Description
5
to output U, U, V, V, W, and W, and works the
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
R
R
(Note 1)
W
W
M16C / 62A Group
Mitsubishi microcomputers