MPC564EVB Freescale Semiconductor, MPC564EVB Datasheet - Page 768
![KIT EVAL FOR MPC561/562/563/564](/photos/39/39/393946/mpc564evbimage_sml.jpg)
MPC564EVB
Manufacturer Part Number
MPC564EVB
Description
KIT EVAL FOR MPC561/562/563/564
Manufacturer
Freescale Semiconductor
Type
Microcontrollerr
Specifications of MPC564EVB
Contents
Module Board, Installation Guide, Power Supply, Cable, Software and more
Processor To Be Evaluated
MPC56x
Data Bus Width
32 bit
Interface Type
RS-232, Ethernet
For Use With/related Products
MPC561, 562, 563, 564
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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Modular Input/Output Subsystem (MIOS14)
17.9.3.5.3
The output port bit operation is selected by leaving both channels disabled, (i.e., by writing to neither
register A nor B). The EDPOL bit alone controls the output value. The same result can be achieved by
keeping EDPOL at zero and using the FORCA and FORCB bits to obtain the desired output level.
17.9.3.6
OPWM mode is selected by setting MODE[0:3] to 1xxx. The MODE[1:3] bits allow some of the
comparator bits to be masked.
This mode allows pulse width modulated output waveforms to be generated, with eight selectable
frequencies. Frequencies are only relevant as such if the counter bus is driven by a counter as a time
reference. Both channels (A and B) are used to generate one PWM output signal on the MDASM signal.
Channel B is accessed via register B1. Register B2 is not accessible. Channels A and B define respectively
the leading and trailing edges of the PWM output pulse. The value in register B1 is transferred to register
B2 each time a match occurs on either channel A or B.
The value loaded in register A is compared with the value on the 16-bit counter bus each time the counter
bus is updated. When a match on A occurs, the FLAG line is activated and the output flip-flop is set. The
value loaded in register B2 is compared with the value on the 16-bit counter bus each time the counter bus
is updated. When a match occurs on B, the output flip-flop is reset.
17-36
Output signal
Mode selection; MODE0 = 1
Internal Register, not accessible to software
Register B1
Register B2
Register A
FLAG bit
Counter Bus
16-bit
Output Pulse Width Modulation (OPWM) Mode
Output Port Bit Operation
A FORCA or FORCB does not cause a transfer from B1 to B2.
Write to A
0x1000
0xxxxx
0xxxxx
0x0500
Figure 17-20. Single Shot Output Transition Example
F LAG reset
by software
MPC561/MPC563 Reference Manual, Rev. 1.2
0x1000
0x1000
0xxxxx
0xxxxx
A Event
Reoccurences of the timer count do
not trigger a response unless registers
A or B have been written again.
0x1100
0x1000
0xxxxx
0xxxxx
NOTE
Write to B
0x1000
0x1000
0xxxxx
0x1100
B Event
0x1000
0xxxxx
0x1100
0x1100
FLAG reset
by software
Freescale Semiconductor
0x1000
0xxxxx
0x1000
0x1100
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