Figure 7-16. Timing of Interval Timer Operation with 16-Bit Resolution
t
Count clock
TM60 count value
00H
N
N
80H
N
7FH
FFH 00H
80H
00H
FFH
7FH
80H
FFH
00H
N
N
00H
7FH
00H
Not cleared because TM50 does not match
Cleared because TM50 and TM60 match simultaneously
CR60
N
N
N
N
N
N
N
N
TCE60
Count start
TM50 count pulse
X
X − 1
00H
X
TM50
CR50
00H
X
01H
00H
X − 1
X
X
INTTM60
Interrupt acknowledgement
Interrupt acknowledgement
Interrupt not generated because
TM50 does not match
TO60 or TO61
Interval time
Remark Interval time = (256X + N + 1) × t: X = 00H to FFH, N = 00H to FFH
NEC [ NEC ]
