Timer Key Features; Figure 3-8. Timer Block Diagram - Motorola MC68302 User Manual

System Integration Block (SIB)
GENERAL-PURPOSE TIMERS
TIMER 2
TIMER 1
TER1
15
TMR1
PRESCALER
DIVIDER
15
TCN1
15
TRR1 REFERENCE REGISTER
15
TCR1
WATCHDOG TIMER
15
TCN3
15
TRR3 REFERENCE REGISTER

3.5.1 Timer Key Features

The two identical general-purpose timer units have the following features:
• Maximum Period of 16 Seconds (at 16.67 MHz)
• 60-ns Resolution (at 16.67 MHz)
• Programmable Sources for the Clock Input
• Input Capture Capability
• Output Compare with Programmable Mode for the Output Pin
• Two Timers Cascadable to Form a 32-Bit Timer
• Free Run and Restart Modes
3-36
7
EVENT REGISTER
MODE REGISTER
MODE BITS
CLOCK
TIMER COUNTER
CAPTURE REGISTER
TIMER COUNTER

Figure 3-8. Timer Block Diagram

MC68302 USER'S MANUAL
0
TIMER
CLOCK
0
GENERATOR
0
CAPTURE
DETECTION
0
0
0
DIVIDE BY
256
0
INTERNAL
MASTER CLOCK/16
OR MASTER CLOCK/1
TIN1
TOUT1
INTERNAL
MASTER CLOCK/16
WDOG
MOTOROLA