MOTOROLA
MC68336/376
x
USER’S MANUAL
(Continued)
Paragraph
Title
Page
TABLE OF CONTENTS
10.1
General .................................................................................................... 10-1
10.2
Address Map ........................................................................................... 10-2
10.3
Time Base Bus System ........................................................................... 10-2
10.4
Bus Interface Unit Submodule (BIUSM) .................................................. 10-3
10.4.1
STOP Effect On the BIUSM ............................................................ 10-3
10.4.2
Freeze Effect On the BIUSM ........................................................... 10-3
10.4.3
LPSTOP Effect on the BIUSM ......................................................... 10-4
10.4.4
BIUSM Registers ............................................................................. 10-4
10.5
Counter Prescaler Submodule (CPSM) .................................................. 10-4
10.5.1
CPSM Registers .............................................................................. 10-5
10.6
Free-Running Counter Submodule (FCSM) ............................................ 10-5
10.6.1
FCSM Counter ................................................................................ 10-6
10.6.2
FCSM Clock Sources ...................................................................... 10-6
10.6.3
FCSM External Event Counting ...................................................... 10-6
10.6.4
FCSM Time Base Bus Driver .......................................................... 10-6
10.6.5
FCSM Interrupts .............................................................................. 10-6
10.6.6
FCSM Registers .............................................................................. 10-7
10.7
Modulus Counter Submodule (MCSM) ................................................... 10-7
10.7.1
MCSM Modulus Latch ..................................................................... 10-8
10.7.2
MCSM Counter ................................................................................ 10-8
10.7.2.1
Loading the MCSM Counter Register ..................................... 10-8
10.7.2.2
Using the MCSM as a Free-Running Counter ........................ 10-9
10.7.3
MCSM Clock Sources ..................................................................... 10-9
10.7.4
MCSM External Event Counting ...................................................... 10-9
10.7.5
MCSM Time Base Bus Driver ......................................................... 10-9
10.7.6
MCSM Interrupts ............................................................................. 10-9
10.7.7
MCSM Registers ........................................................................... 10-10
10.8
Double-Action Submodule (DASM) ....................................................... 10-10
10.8.1
DASM Interrupts ............................................................................ 10-12
10.8.2
DASM Registers ............................................................................ 10-12
10.9
Pulse-Width Modulation Submodule (PWMSM) .................................... 10-12
10.9.1
Output Flip-Flop and Pin ............................................................... 10-13
10.9.2
Clock Selection .............................................................................. 10-13
10.9.3
PWMSM Counter .......................................................................... 10-14
10.9.4
PWMSM Period Registers and Comparator .................................. 10-14
10.9.5
PWMSM Pulse-Width Registers and Comparator ......................... 10-15
10.9.6
PWMSM Coherency ...................................................................... 10-15
10.9.7
PWMSM Interrupts ........................................................................ 10-15
10.9.8
PWM Frequency ............................................................................ 10-16
10.9.9
PWM Pulse Width ......................................................................... 10-17
10.9.10
PWM Period and Pulse Width Register Values ............................. 10-17
336376UMBook Page x Friday, November 15, 1996 2:09 PM