Square-Wave Output Operation Timing; Bit Timer/Event Count Square-Wave Output Ranges - NEC PD78052 User Manual

Count Clock
TM0 Count Value
0000
CR00
INTTM0
TO0 Pin Output
Table 8-7. 16-Bit Timer/Event Count Square-Wave Output Ranges
Minimum Pulse Width
MCS = 1 MCS = 0
2 TI00 input cycle
2
—
(400 ns)
2
2 1/f 2
X
(400 ns) (800 ns)
2 3
2 1/f 2
X
(800 ns) (1.6 s)
3 4
2 1/f 2
X
(1.6 s) (3.2 s)
2 watch timer output cycle
Remarks 1. f : Main system clock oscillation frequency
X
2. MCS : Oscillation mode selection register (OSMS) bit 0
3. Values in parentheses when operated at f
CHAPTER 8 16-BIT TIMER/EVENT COUNTER
Figure 8-30. Square-Wave Output Operation Timing
0001 0002 N-1
N
Maximum Pulse Width
MCS = 1
16
2 TI00 input cycle
1/f
X
—
16
1/f 2 1/f
X X
(13.1 ms)
17
1/f 2 1/f
X X
(26.2 ms)
18
1/f 2 1/f
X X
(52.4 ms)
16
2 watch timer output cycle
N 0000 0001 0002
MCS = 0 MCS = 1
TI00 input edge cycle
16
2 1/f
X
—
(13.1 ms)
17
2 1/f 1/f
X X
(26.2 ms) (200 ns)
18
2 1/f 2 1/f
X
(52.4 ms) (400 ns)
19 2
2 1/f 2 1/f
X
(104.9 ms) (800 ns)
Watch timer output edge cycle
= 5.0 MHz
X
N-1 N 0000
Resolution
MCS = 0
1/f
X
(200 ns)
2 1/f
X
(400 ns)
2
2 1/f
X X
(800 ns)
3
2 1/f
X X
(1.6 s)
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