SYNPWM datasheet(35/57 Pages) FEELING

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FM8P73B

Web site: http://www.feeling-tech.com.tw

Rev1.0 Nov 20, 2013

P.35/FM8P73B

FEELING

TECHNOLOGY

Figure 2.13: IRC Oscillator Mode (Internal R, Internal C Oscillator)

FM8P73B

IOB5

IOB4

Internal

Circuit

2.10

Configuration Words

Table 2.3: Configuration Words

Name

Description

Fosc

Oscillator Selection Bit



IRC(4MHz) mode (default)



ERC mode



HF crystal mode



XT crystal mode



LF crystal mode

Note: See Table 2.4 for detail description.

WDTEN

Watchdog Timer Enable Bit



WDT enabled (default)



WDT disabled

LVDT

Low Voltage Detector Selection Bit



LVDT Disable (default)



LVDT = 2.0V



LVDT = 2.3V



LVDT = 3.5V

RSTBIN

IOB3/RSTB Pin Selection Bit



RSTB pin is selected (default)



IOB3 pin is selected

PWRT

Power On Reset time Selection Bit



20ms is selected (default)



5ms is selected

OSCD

Instruction Period Selection Bit



four oscillator periods (4T) (default)



two oscillator periods (2T)

OSCOUT

IOB4/OSCO Pin Selection Bit



OSCO pin is selected (default)



IOB4 pin is selected

PROTECT

Code Protection Bit



NO, EPROM code protection off (default)



YES, EPROM code protection on

Table 2.4: Selection of IOB5/OSCI and IOB4/OSCO Pin

Mode of oscillation

IOB5/OSCI

IOB4/OSCO

IRC

Force to IOB5

Force to IOB4

ERC

Force to OSCI

IOB4/OSCO selected by OSCOUT bit

HF, XT, LF

Force to OSCI

Force to OSCO

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