FS98O02B-PCE datasheet(22/50 Pages) FORTUNE

Part #	FS98O02B-PCE

Description	8-bit MCU with 2k program EPROM, 128-byte RAM

PDF	50 Pages

Scroll/Zoom	100%

Manufacturer	FORTUNE [Fortune Semiconductor Corp.]

Direct Link	https://www.ic-fortune.com/eng/index.asp

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22 / 50 page

FS98O02

Rev.1.5

22/50

12.4 Analog Bias Circuit

Figure 12-4: Analog Bias Circuit

Before enabling the analog block, EN_VDDA must be set. When the internal voltage doubler is used, a

10nF capacitor must be connected between pin VB and VSS for reducing voltage doubler’s noise.

12.5 Analog Common Voltage Generator

Analog common voltage generator is used to generate the analog common voltage, AGND.

Figure 12-5: Analog Common Voltage Generator

When EN_VDDA = 1, analog common voltage generator is enabled. AGND voltage is about 1/2 VDDA.

12.6 Low Battery Detector

Low battery detector is used for VDD low voltage detection. FS98O02 embeds a voltage divider which can

generate 2.3V、2.4V、2.5V、2.6V and 2.7V. A multiplexer is used to connect the voltage divides to component

input. The multiplexer’s output is compares with 1.2V. The Control register flags are SILB[2:0] and the EN_LB.

FS98O02B-PCE Datasheet(PDF) 22 Page - Fortune Semiconductor Corp.