NEC 78K0 User Manual page 136

Figure 6-10. Control Register Settings for Interval Timer Operation (2/2)
ES101 ES100 ES001
PRM00 0/1 0/1 0/1
Remark 0/1: Setting 0 or 1 allows another function to be used simultaneously with the interval timer. See the
description of the respective control registers for details.
f
X
2
f /2
X
8
f /2
X
Noise
TI000/P00
eliminator
f
X
Note OVF00 is set to 1 only when 16-bit timer capture/compare register 000 is set to FFFFH.
Count clock
TM00 count value
0000H
Timer operation enabled
CR000
INTTM000
Remark Interval time = (N + 1) × t
N = 0001H to FFFFH
136
CHAPTER 6 16-BIT TIMER/EVENT COUNTER 00
(c) Prescaler mode register 00 (PRM00)
ES000 3 2 PRM001
0/1 0 0 0/1
Figure 6-11. Interval Timer Configuration Diagram
16-bit timer capture/compare
register 000 (CR000)
16-bit timer counter 00
(TM00)
Figure 6-12. Timing of Interval Timer Operation
t
0001H N 0000H 0001H
Clear
N N
Interrupt acknowledged
User's Manual U16227EJ2V0UD
PRM000
0/1
Selects count clock.
Setting invalid (setting "10" is prohibited.)
Setting invalid (setting "10" is prohibited.)
N 0000H 0001H
Clear
N
INTTM000
Note
OVF00
Clear
circuit
N
N
Interrupt acknowledged