NEC PD78F9488 - Manual (Page 152)

CHAPTER 7 8-BIT TIMERS 50, 60, AND 61
User’s Manual U15331EJ4V1UD
152
Figure 7-23. Timing of Carrier Generator Operation (When CR60 = N, CRH60 = M (M < N))
TM60
count clock
TM60
count value
CR60
TCE60
INTTM60
N 00H
N
L
CRH60 M
Carrier clock
N 00H
00H 01H L 00H 01H L 00H 01H L 00H L 00H 01H
TM50
count value
CR50
TCE50
INTTM50
TM50
count clock
0 1 0 1 0
0 1 0 1 0
NRZB60
NRZ60
TO60
Carrier clock
M 00H M M 00H M 00H
Clear Clear Clear Clear
Count start
Remark 00H ≤ M < N ≤ FFH, L = 00H to FFH