Cmsemicon SC7020 Series Скачать руководство пользователя страница 4 | Manualshive

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SC7020x

www.mcu.com.cn

Rev. 1.1

4. System Structure Diagram

Sensor

oscillator circuit

Sensor &

Reference

detecting circuit

Timing counter

& function

option control

circuit

System

oscillator circuit

Regulator

circuit

Touch

detecting circuit

Key-on &

Timing control

Output &

Driver circuit

TK

QC/QD

TOG

AHLB

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Содержание SC7020 Series

Страница 1: ...th trademarks of our company Our company preserve the rights to further elaborate on the improvements about product functions reliability and design in this manual However our company is not responsib...

Страница 2: ...0201 SC70202 Pin Diagram 5 5 2 SC70205 Pin Diagram 6 6 FUNCTION DESCRIPTION 7 6 1 Output Mode and Pad Option 7 6 2 Maximum output time of key 7 6 3 Low Power Mode 7 6 4 Sensitivity adjustment 8 7 APPL...

Страница 3: ...nt anti interference performance built in voltage regulator circuit power on reset low voltage reset function and environment adaptive algorithm and other measures Low power standby current Typical va...

Страница 4: ...ture Diagram Sensor oscillator circuit Sensor Reference detecting circuit Timing counter function option control circuit System oscillator circuit Regulator circuit Touch detecting circuit Key on Timi...

Страница 5: ...output pin 2 GND P Negative power supply ground 3 TK I Touch key sensor input pin 4 AHLB I PL Output QC active high or low selection 0 Default Active high 1 Active low 5 VDD P Positive power supply 6...

Страница 6: ...ive power supply ground 3 TK I Touch key sensor input pin 4 AHLB I PL Output QC active high or low selection 0 Default Active high 1 Active low 5 VDD P Positive power supply 6 TOG I PL Output type sel...

Страница 7: ...output time of key Objects covering the touchpad or sudden changes in the environment may cause touch detection to remain active The system will return to the initial state of power on and the output...

Страница 8: ...conditions are fixed Using a larger touchpad size can increase sensitivity Otherwise it can decrease sensitivity But the touchpad size must use in the effective scope 2 By the panel thickness Under o...

Страница 9: ...nclude the metal or the electric element The paints on the surfaces are the same 4 The C1 capacitor 104 or larger must be used between VDD and GND and should be routed with very short tracks to the de...

Страница 10: ...TA 25 unless otherwise indicated Parameter Symbol Conditions Min Typ Max Unit Working voltage VDD 2 4 3 5 5 V Internal Regulator Output VREG 2 0 2 2 2 4 V High level input voltage VIH 0 75 1 0 VDD Lo...

Страница 11: ...9 1 SOT23 6 Symbol Millimeter Min Nom Max A 1 25 A1 0 04 0 10 A2 1 00 1 10 1 20 A3 0 55 0 65 0 75 b 0 38 0 48 b1 0 37 0 40 0 43 c 0 11 0 21 c1 0 10 0 13 0 16 D 2 72 2 92 3 12 E 2 60 2 80 3 00 E1 1 40...

Страница 12: ...12 12 SC7020x www mcu com cn Rev 1 1 10 Version Revision Version number Time Revised content V1 0 May 2020 Original version V1 1 Dec 2021 Delete some chip products...

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