FS9721B datasheet(13/35 Pages) FORTUNE

Teilenummer	FS9721B

Bauteilbeschribung	2,400 counts auto range DMM IC,

PDF	35 Pages

Scroll/Zoom	100%

Hersteller	FORTUNE [Fortune Semiconductor Corp.]

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

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13 / 35 page

FS9721B

Rev. 1.7

13/35

RS232 Transmission Protocol

Direction: One-way to computer.

Series Transmission Rate: 2400 bps

Data Bit: 8 bit.

Odd and Even Calibration: None

Data Decimal: Hex

Data Length: 14 Bytes.

Data Information: LCD table on-off information.

Data Format:

1st byte → 1X (X is seg1, 4 bits represent the data on the LCD table)

2nd byte→ 2X (X is seg2, 4 bits represent the data on the LCD table)

3rd byte → 3X (X is seg3, 4 bits represent the data on the LCD table)

and so on.

1X → 4 bit,

2X→ 4 bit,

3X→ 4 bit

……………

EXH→ 4it

X means: Bit3〜Bit 0→ segn (COM4―COM1)

Sampling Rate: 40KHz

ADC Output Frequency: 40Hz

ADC Output Frequency after Average: 10Hz

Output Frequency after Auto-Zero: 4Hz

LCD Display -- FS9721B/Q100(C2=LCDC2= C1=LCDC1=

Notes: 1. Working Voltage: 3V.

2. Drive Method: 1/4

Duty, 1/3 Bias.

Diagram 4

LCD Display Structure

FS9721B Datenblatt(PDF) 13 Page - Fortune Semiconductor Corp.