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SH79F166AP/044PR Datasheet(PDF) 70 Page - SINOWEALTH Electronic Ltd

Part # SH79F166AP/044PR
Description  Enhanced 8051 Microcontroller with 10bit ADC
PDF  113 Pages
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Manufacturer  SINOWEALTH [SINOWEALTH Electronic Ltd]
Direct Link  https://en.sinowealth.com
Logo SINOWEALTH - SINOWEALTH Electronic Ltd

SH79F166AP/044PR Datasheet(HTML) 70 Page - SINOWEALTH Electronic Ltd

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SH79F166A
70
8.3 PWM (Pulse Width Modulation)
8.3.1 Feature
 Complementary output with dead time control
 Provided interrupt function on period
 Selectable output polarity
 Fault Detect function provided to disable PWM output immediately
 Lock register provided to avoid PWM control register to be unexpected change
The SH79F166A has one 12-bit PWM module. Which can provide the pulse width modulation waveform with the period and the
duty being controlled individually by corresponding register.
PWM timer can be turned to inactive state by the input of FLT pin automatically if EFLT is set.
PWM timer also provides 1 interrupts for PWM0. This makes it possible to change period or duty in every PWM period.
8.3.2 PWM Module Enable
Table 8.12 PWM Module Enable Register
CFH
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
PWMEN
-
EFLT
-
-
EPWM01
-
-
EPWM0
R/W
-
R/W
-
-
R/W
-
-
R/W
Reset Value
(POR/WDT/LVR/PIN)
-
0
-
-
0
-
-
0
Bit Number
Bit Mnemonic
Description
6
EFLT
FLT pin configuration:
0: general purpose I/O or SS
———
pin (default)
1: PWM Fault Detect input pin
3
EPWM01
PWM01 output enable
0: I/O port
1: PWM output
0
EPWM0
Enable 12-bit PWM0
0: I/O port
1: PWM output
PWM output will be disable at the same time when the PWM Enable register is clear to 0.
The main purpose of the FLT pin is to inactivate the PWM output signals and drive them into an inactive state. The action of the
FLT is performed directly in hardware so that when a fault occurs, it can be managed quickly and the PWMs outputs are put into
an inactive state to save the power devices connected to the PWMs. The FLT pin has no internal pull-high resistor.
If EFLT is set to 0, it means the level on FLT pin has no effect on PWM timers.
Table 8.13 PWM Module Enable Register
B7H
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
PWMEN1
-
-
-
-
-
-
-
PWM0
R/W
-
-
-
-
-
-
-
R/W
Reset Value
(POR/WDT/LVR/PIN)
-
-
-
-
-
-
-
0
Bit Number
Bit Mnemonic
Description
0
PWM0
Enable 12-bit PWM0
0: PWM output enable
1: PWM output disable, PWM0. PWM01 as I/O, but PWM timer can work normally,
Trigger interrupt



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