Interval Timer Configuration Diagram; Timing Of Interval Timer Operation - NEC 78K0 User Manual

Note 1
f (f )
X X
Note 1
2 4
f /2 (f /2 )
X X
8 6 Note 1
f /2 (f /2 )
X X
Noise
TI000/P00
eliminator
Note 1
(TI001/P05)
f
X
Notes 1. Frequencies and pin names without parentheses are for 16-bit timer/event counter 00, and those in
parentheses are for 16-bit timer/event counter 01.
2. OVF0n is set to 1 only when 16-bit timer capture/compare register 00n is set to FFFFH.
Count clock
TM0n count value
0000H
Timer operation enabled
CR00n
INTTM00n
Remark Interval time = (N + 1) × t
N = 0001H to FFFFH
µ
n = 0: PD780143, 780144
µ
n = 0, 1: PD780146, 780148, 78F0148
CHAPTER 7 16-BIT TIMER/EVENT COUNTERS 00 AND 01
Figure 7-16. Interval Timer Configuration Diagram
16-bit timer capture/compare
register 00n (CR00n)
Figure 7-17. Timing of Interval Timer Operation
t
*
0001H N 0000H 0001H
Clear
N N
Interrupt acknowledged
User's Manual U15947EJ2V0UD
16-bit timer counter 0n
(TM0n)
N
Clear
N
INTTM00n
Note 2
OVF0n
Clear
circuit
0000H 0001H N
N
Interrupt acknowledged
187