Chapter 8
8-bit Timer
VIII - 2 Overview
8.1 Overview
This LSI contains 12 general purpose 8-bit timers (timer 0 to timer 7, timer14 to timer17).
Timer 14 to timer16 can be used as baud rate timers of serial interface.
8.1.1 Functions
Table:8.1.1 shows functions that can be used with each timer.
Table:8.1.1 Timer Functions
Timer 0 Timer 1 Timer 2 Timer 3 Pages
Interrupt cause NTMIRQ0 NTMIRQ1 NTMIRQ2 NTMIRQ3 -
Interval timer                 VIII-32
Timer output -              VIII-36
Event count -             VIII-38
Baud rate timer - - - - VIII-32
Cascade connection - Connect with timer 0 Connect with timer 1 Connect with timer 2 VIII-40
Counter source IOCLK
IOCLK/8
IOCLK/32
IOCLK/128
Timer 1 underflow
Timer 2 underflow
IOCLK
IOCLK/8
IOCLK/32
Timer 0 underflow 
Timer 2 underflow
TM1IO pin input 
Cascading with timer 0
IOCLK
IOCLK/8
IOCLK/32
IOCLK/128
Timer 0 underflow
Timer 1 underflow
TM2IO pin input
Cascading with timer 1
IOCLK
IOCLK/8
IOCLK/32
Timer 0 underflow
Timer 1 underflow
Timer 2 underflow
TM3IO pin input 
Cascading with timer 2
VIII-32
Timer 4 Timer 5 Timer 6 Timer 7 Page
Interrupt cause NTMIRQ4 NTMIRQ5 NTMIRQ6 NTMIRQ7 -
Interval timer                  VIII-32
Timer output         -     VIII-36
Event count       -     VIII-38
Baud rate timer  - - - - VIII-32
Cascade connection - Connect with timer 4 Connect with timer 5 Connect with timer 6 VIII-40
Counter source IOCLK
IOCLK/8
IOCLK/32
IOCLK/128
Timer 5 underflow
Timer 6 underflow
TM4IO pin input
IOCLK
IOCLK/8
IOCLK/32
Timer 4 underflow
Timer 6 underflow
TM5IO pin input
Cascading with timer 4
IOCLK
IOCLK/8
IOCLK/32
IOCLK/128
Timer 4 underflow
Timer 5 underflow
Cascading with timer 5
IOCLK
IOCLK/8
IOCLK/32
Timer 4 underflow
Timer 5 underflow
Timer 6 underflow
TM7IO pin input
Cascading with timer 6
VIII-32