mc3phacvp Freescale Semiconductor, Inc, mc3phacvp Datasheet - Page 22

• Manufacturer Part Number: mc3phacvp
• Description: Mc3phac Motor Control Unit
• Manufacturer: Freescale Semiconductor, Inc

Operation
exception to this rule is that PC master software allows reading locations $0001, $0036 and $FE01, which
are PORTB data register, Dead Time register and SIM Reset Status registers respectively. The
addresses for the WRITEVARx commands are checked for validity, and the data field is also limited to a
valid range for each variable. See
User interface variables and their associated PC master software addresses within the MC3PHAC are
listed in
22
Commanded direction
Commanded PWM
Measured PWM
Commanded PWM
Dead time
Base frequency
Acceleration
Commanded motor
Actual frequency
Status
Voltage boost
Modulation index
Command reset
frequency
period
polarity
frequency
(7)
Name
Table
(2), (3), (4)
(2), (3), (4)
(1)
(3)
(3)
6.
(3)
Table 6. User Interface Variables for Use with PC Master Software
Address
$00A8
$00C8
$006C
$1000
$1000
$1000
$1000
$0036
$1000
$0060
$0062
$0085
$0091
MC3PHAC Monolithic Intelligent Motor Controller, Rev. 2
Read/
Write
Table 6
R/W
R/W
R/W
R/W
W
W
W
W
W
R
R
R
R
(Bytes)
for a list of valid data values and valid write addresses.
Size
1
1
1
2
1
1
1
2
2
2
1
1
1
Determines whether the motor should
Forces the MC3PHAC to perform an
Specifies the frequency of the
The modulus value supplied to the
Specifies the polarity of the MC3PHAC
Example: $50 = Bottom and top PWM
Specifies the dead time used by the
Dead time = Value * 125 ns.
Specifies the motor frequency at which
Acceleration in Hz/sec (7.9 format)
Commanded frequency in Hz.
Actual frequency in Hz. (8.8 format)
Status byte
0 Hz voltage.
Voltage level (motor waveform
go forward, reverse, or stop
immediate reset
MC3PHAC PWM frequency
PWM generator used by the
MC3PHAC — value is multiplied by
250 ns to obtain PWM period
PWM outputs. This is a write once
parameter after reset.
outputs are positive polarity.
PWM generator.
This is a write-once parameter.
full voltage is applied
(8.8 format)
%Voltage boost = Value/$FF
amplitude percent assuming no bus
ripple compensation)
Modulation index = value/$FF
Description
(9)
(8)
Freescale Semiconductor
(9)
5.3 kHz — $41
10.6 kHz — $42
15.9 kHz — $44
21.1 kHz — $48
Forward — $10
Reverse — $11
$00BD–$05E8
$0000–$7FFF
$0000–$7FFF
$0000–$7FFF
60 Hz — $60
50 Hz — $61
Stop — $20
B – T – $5C
B + T + $50
B + T – $54
B – T + $58
Valid Data
$00–$FF
$00–$FF
$00–$FF
$00–$FF
$30