Intel E3845 FH8065301487715 Scheda Tecnica
Codici prodotto
FH8065301487715
SIO – Pulse Width Modulation (PWM)
Intel
®
Atom™ Processor E3800 Product Family
4264
Datasheet
28.3
Use
28.3.1
PWM Programming Sequence
For first time activation, follow sequence:
1. Program the counter value PWMCTRL
.
PWM_BASE_UNIT and
PWMCTRL
.
PWM_ON_TIME_DIVISOR
2. Set the PWMCTRL
.
PWM_SW_UPDATE bit
3. Enable PWM output by setting the PWMCTRL
.
PWM_ENABLE bit
For update on the fly, follow sequence:
1. Program the counter value PWMCTRL
.
PWM_BASE_UNIT and
PWMCTRL
.
PWM_ON_TIME_DIVISOR
2. Set the update bit PWMCTRL
.
PWM_SW_UPDATE
28.4
Register Map
for additional information.
Table 281. Example PWM Output Frequency and Resolution
Target
Frequency
Base Unit
Value Register
Base 25 MHz Cycle Count
Duty Cycle
Resolution
Resolution
12.5 MHz
>=128 * 256
1
no resolution
1.07 MHz
11 * 256
23
<8 bit resolution
488 kHz
5 * 256
51
<8 bit resolution
97.6 kHz
1 * 256
256
8 resolution
48.4 kHz
0.5 * 256
512
>= 8 bit
resolution
0
0
0
Flat 0 output