MC68HC908MR8 Datasheet, PDF (162/372 Pages) Motorola, Inc – Microcontrollers

Pulse-Width Modulator for Motor Control
CYCLE START
DISY
SOFTWARE X DISABLE
SQ
R
FMODE4
LOGIC HIGH FOR FAULT
FPIN4
TWO
ONE
FAULT
PIN4
SAMPLE
FILTER
SHOT
S
R
CLEAR BY WRITING 1 TO FTACK4
Q _FFLAG4
AUTO
MODE
MANUAL
MODE
The example is of fault pin 4 with DISY.
FINT4
FAULT PIN 4 DISABLE
SQ
R
BANK Y
DISABLE
INTERRUPT REQUEST
Note: In manual mode (FMODE = 0), fault 4 may be cleared only if a logic level low
at the input of the fault pin is present.
CYCLE START
FMODE1
LOGIC HIGH FOR FAULT
FPIN1
FAULT
PIN1
TWO
SAMPLE
FILTER
ONE
SHOT
S
R
CLEAR BY WRITING 1 TO FTACK1
Q _FFLAG1
AUTO
MODE
MANUAL
MODE
The example is of fault pin 1.
FINT1
FAULT PIN 1 DISABLE
SQ
R
BANK X DISABLE
INTERRUPT REQUEST
Note: In manual mode (FMODE = 0), fault 1 may be cleared regardless of the logic level
at the input of the fault pin.
Figure 9-21. PWM Disabling Scheme
To allow for different motor configurations and the controlling of more
than one motor, the PWM disabling function is organized as two banks,
bank X and bank Y. Bank information combines with information from
the disable mapping register to allow selective PWM disabling. Fault
Technical Data
162
MC68HC908MR8 — Rev 4.1
Pulse-Width Modulator for Motor Control (PWMMC) Freescale Semiconductor