sc9s12hy64j0vllr Freescale Semiconductor, Inc, sc9s12hy64j0vllr Datasheet - Page 710

• Manufacturer Part Number: sc9s12hy64j0vllr
• Description: S12 Microcontrollers Mcu 16-bit Hcs12 Cisc 32kb Flash 5v Tray
• Manufacturer: Freescale Semiconductor, Inc

Motor Controller (MC10B8CV1)
The motor controller channel frequency of operation can be calculated using the following formula if
DITH = 1:
Table 19-14
different peripheral bus clock frequencies and the prescaler value.
19.4.4
In order to prevent large peak current draw from the motor power supply, selectable delays can be used to
stagger the high logic level to low logic level transitions on the motor controller outputs. The timing delay,
t
selectable between 0, 1, 2, or 3 motor controller timer counter clock cycles.
710
d
, is determined by the CD[1:0] bits in the corresponding channel control register (MCMCx) and is
Output Switching Delay
shows examples of the motor controller channel frequencies that can be generated based on
Both equations are only valid if MCPER is not equal to 0. M = 1 for left or
right aligned mode, M = 2 for center aligned mode.
Due to the selectable slew rate control of the outputs, clipping may occur on
short output pulses.
A PWM channel gets disabled at the next timer counter overflow without
notice of the switching delay.
Prescaler
Motor Channel Frequency (Hz)
1/2
1/4
1/8
1
Table 19-14. Motor Controller Channel Frequencies (Hz),
MC9S12HY/HA-Family Reference Manual, Rev. 1.04
MCPER = 256, DITH = 0, MCAM = 10, 01
16 MHz
62500
31250
15625
7813
Peripheral Bus Clock Frequency
10 MHz
39063
19531
9766
4883
NOTE
NOTE
NOTE
=
------------------------------------- -
MCPER M 2
8 MHz
31250
15625
7813
3906
f
TC
5 MHz
19531
9766
4883
2441
4 MHz
15625
7813
3906
1953
Freescale Semiconductor