NEC PD78F9488 User Manual
Page 142
CHAPTER 7 8-BIT TIMERS 50, 60, AND 61
User’s Manual U15331EJ4V1UD
142
Table 7-7. Square-Wave Output Range of Timer 60
TCL602 TCL601 TCL600
Minimum Pulse Width
Maximum Pulse Width
Resolution
0 0 0
1/f
X
(0.2
µ
s)
2
8
/f
X
(51.2
µ
s)
1/f
X
(0.2
µ
s)
0 0 1
2
2
/f
X
(0.8
µ
s)
2
10
/f
X
(204
µ
s) 2
2
/f
X
(0.8
µ
s)
0 1 0
f
TMI
input cycle
f
TMI
input cycle
× 2
8
f
TMI
input cycle
0 1 1
f
TMI
/2 input cycle
f
TMI
/2 input cycle
× 2
8
f
TMI
/2 input cycle
1 0 0
f
TMI
/2
2
input cycle
f
TMI
/2
2
input cycle
× 2
8
f
TMI
/2
2
input cycle
1 0 1
f
TMI
/2
3
input cycle
f
TMI
/2
3
input cycle
× 2
8
f
TMI
/2
3
input cycle
Remarks 1. f
X
: Main system clock oscillation frequency
2. f
TMI
: External input clock frequency
3. The parenthesized values apply to operation at f
X
= 5.0 MHz.
Table 7-8. Square-Wave Output Range of Timer 61
TCL612 TCL611 TCL610
Minimum Pulse Width
Maximum Pulse Width
Resolution
0 0 0
1/f
X
(0.2
µ
s)
2
8
/f
X
(51.2
µ
s)
1/f
X
(0.2
µ
s)
0 0 1
2
4
/f
X
(3.2
µ
s)
2
12
/f
X
(819
µ
s) 2
4
/f
X
(3.2
µ
s)
0 1 0
f
TMI
input cycle
f
TMI
input cycle
× 2
8
f
TMI
input cycle
0 1 1
f
TMI
/2 input cycle
f
TMI
/2 input cycle
× 2
8
f
TMI
/2 input cycle
1 0 0
f
TMI
/2
2
input cycle
f
TMI
/2
2
input cycle
× 2
8
f
TMI
/2
2
input cycle
1 0 1
f
TMI
/2
3
input cycle
f
TMI
/2
3
input cycle
× 2
8
f
TMI
/2
3
input cycle
Remarks 1. f
X
: Main system clock oscillation frequency
2. f
TMI
: External input clock frequency
3. The parenthesized values apply to operation at f
X
= 5.0 MHz.
Figure 7-18. Timing of Square-Wave Output with 8-Bit Resolution
Count clock
CRnm
TCEnm
INTTMnm
TOnm
Note
N
TMnm
N
00H
01H
N
00H
01H
N
00H
01H
00H
01H
Clear
Clear
Clear
Count start
Interrupt acknowledgement
Interrupt acknowledgement
Interrupt acknowledgement
Note The initial value of TOnm is low level when output is enabled.
Remark N = 00H to FFH
nm = 50, 60, 61