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参数资料
| 型号： | ST52T301P |
| 厂商： | 意法半导体 |
| 英文描述： | 8-Bit OTP/EPROM DuaLogic] MCUs WITH ADC, UART, TIMER, TRIAC & PWM DRIVER |
| 中文描述： | 8位检察官办公室/存储器DuaLogic]与艺术发展局和UART，定时器，可控硅控制器 |
| 文件页数： | 47/100页 |
| 文件大小： | 497K |
| 代理商： | ST52T301P |
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10.1PWMGENERATOR WORKINGMODE
When REG_CONF10 (3:2) bits, MODE, are ”01”,
the peripheral is programmed to work in PWM
Mode.
Byusing the 16-bitprescaler,the PWMperiod can
be generatedbydividingthe internalmasterclock,
or an external clock signal applied on the pin
MAIN1,or themainvoltagefrequency,byusingthe
circuit shownin Figure 10.6.
NOTE: The external clock signal, applied on
MAIN1pin,musthaveafrequencyatleastthree
timesmaller than the internal master clock.
The clock source can be selected by using
REG_CONF10(5:4)bits,CKSL(seeTable10.4and
Figure10.9).If the clock source selectedis not the
mainvoltagefrequency(CKSL=1x),MAIN2pincan
be configured as input or output, by using
REG_CONF10(7)bit, IOSL (see Table10.4).
If MAIN2 is an output, on this pin it is possible to
get the prescaleroutput signal Tck.
The period of the PWM signal is obtainedbyusing
the following relation:
T=256*Tck
where Tck is the output of the 16-bit prescaler
managedbyREG_CONF8andREG_CONF9(see
Figure10.2).
NOTE. In PWM working mode, the value N,
stored in the 16-bit prescaler, must be in the
range from 2 to 2
16
-1
By using a 20 MHz clock master it is possible to
obtain a PWM frequency in the range 1.2 Hz to
26.04 KHz.
The value Ton is proportional to a value,
INIT_VALUE,thatcan be a fuzzyoutput or a value
Value
Description
01
PWM Driver
10
Burst Mode Control
(1)
11
Phase Angle Control
Note:
(1)
REG_CONF10(5) must be set to ”1”
Table10.1.MODE- Triac/PWMWorkingMode
Settings
MCLK
Frequency
1/
T
min
0.3Hz
max
6.51 kHz
5 MHz
10 MHz
20 MHz
0.6 Hz
1.2 Hz
13.02 kHz
26.04 kHz
Table10.2. PWM Frequencies
T = 256 * Tck
Ton= INIT_VALUE*Tck
Toff
TRIACOUT
Figure10.3.PWM Functionament
coming from Register File, according with the
INPSL and FZSL configuration bits of
REG_CONF12(see Table10.6 and Figure 10.12).
The Ton is equal to:
Ton=INIT_VALUE*Tck.
It means the Ton can be fixed by the control
algorithm that can be either the output of a fuzzy
inferenceor the result of an arithmeticcalculus.In
thesecondcase,thedata,storedinthei-thlocation
of the Register File, can be loaded by using the
instruction:
LDPR 1, reg-i
.
If the INIT_VALUEis 255 the Toffis equalto Tck.
47/99
ST52T301/E301
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