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Section 9 8-Bit PWM Timer (PWMU)
(2)
12-Bit Single Pulse Mode
When 12-bit single pulse mode is selected, PWMPRE0, PWMPRE2, and PWMPRE4 are valid.
The settings of PWMPRE1, PWMPRE3, and PWMPRE5 are invalid.
PWM cycle = [4095 × (n + 1)] / internal clock frequency (0 ≤ n ≤ 255)
Resolution, PWM Conversion Period, and Carrier Frequency when φ = 20 MHz
Table 9.7
(12-Bit Counter Operation)
Internal Clock
Frequency
Resolution
φ
50 ns
φ/2
100 ns
φ/4
200 ns
φ/8
400 ns
(3)
16-Bit Single Pulse Mode
When 16-bit single pulse mode is selected, PWMPRE0, PWMPRE2, and PWMPRE4 are valid.
The settings of PWMPRE1, PWMPRE3, and PWMPRE5 are invalid.
PWM cycle = [65535 × (n + 1)] / internal clock frequency (0 ≤ n ≤ 255)
Resolution, PWM Conversion Period, and Carrier Frequency when φ = 20 MHz
Table 9.8
(at 16-bit counter operation)
Internal Clock
Frequency
Resolution
φ
50 ns
φ/2
100 ns
φ/4
200 ns
φ/8
400 ns
Rev. 1.00 May 09, 2008 Page 210 of 954
REJ09B0462-0100
PWM Conversion Period
Min.
Max.
204.8 µs
52.4 ms
409.5 µs
104.8 ms
819.0 µs
209.7 ms
1.6 ms
419.3 ms
PWM Conversion Period
Min.
Max.
3.3ms
838.8 ms
6.6ms
1.7 s
13.1ms
3.4 s
26.2ms
6.7 s
Carrier Frequency
Single Pulse Mode
Min.
Max.
19.1 Hz
4.9 kHz
9.5 Hz
2.4 kHz
4.8 Hz
1.2 kHz
2.4 Hz
0.6 kHz
Carrier Frequency
Single Pulse Mode
Min.
Max.
1.2 Hz
305.2 Hz
0.6 Hz
152.6 Hz
0.3 Hz
76.3 Hz
0.1 Hz
38.1 Hz
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