Diodes AP386X User Manual download pdf

Preliminary Datasheet

Superior Multi-touch Capacitive Touch Screen Controller AP386X

Aug. 2013 Rev. 1. 0 BCD Semiconductor Manufacturing Limited

General Description

The AP386X is a low-cost high-resolution single chip

solution for APA (All point addressable) capacitive

touch screen. It is an 8-bit single cycle 8051

microcontroller with ICP Interface. The chip includes

12-bit successive approximation analog-to-digital

converters with an I

C interface and

multiplexer-switcher circuits for flexible

measurement of analog signal from APA panel. An

accurate switched-capacitor integrator is built-in and

it can auto calibrate the pixel parameters for a wide

range of capacitance on the touch screen (1pF to

32pF). This touch screen controller (TSC) with

CMOS integration circuit provides an ideal choice for

APA touch panel. The AP386X is specified over the

temperature range of -40°C to 85°C.

The AP386X is available in QFN-5×5-40 (for

AP3860) and QFN-6×6-48 (for AP3861) packages.

Features

•

Mutual Capacitive Touch Sensing

•

Single Power Supply: 2.8V to 3.6V Operation

Voltage; LDO inside to Support 1.6V to 2.0V

Operation Voltage

•

Up to 17/23 Drive Lines and 10/12 Sense Lines

•

Charge Pump Support up to 6V, Doubling SNR

•

Internal Two-wire Serial Control Bus I

•

Single-end Integrator with Programmable Gain

Control

• Multiplexed Analog Digitization with 12-bit

Resolution Scan SAR ADCs and Its Dedicated

2X to 8X Accumulator XSRAM Buffers

Features (Continued)

• Single Cycle 8051 CPU Core, Maximum Opera-

ting Clock up to 28MHz from IOSC (Zero Wait

State)

4 to 28MHz Internal Oscillator (IOSC)

32k-byte Flash ROM

6k-byte Internal SRAM

Two 16-bit Timers T0/T1

Configurable I

C Slave Controller and SPI Slave

Controller Shared with the Same Ports

 With Asynchronous I

C Slave Address

Detection Logic Design

4 General Purpose GPIO Pins

One External Interrupt Pin

• ISP/IAP via I²C Port

• Operation Temperature Range: -40°C to 85°C

• Package Type Alternatives: QFN-5×5-40 and

QFN-6×6-48

• RoHS Compliance

•

Operating Mode:

Mode Description

Power-down No scan with power-down mode

Idle While only 8051 CPU core is idle,

all peripherals remain active

Standard Higher scan rate when fingers are

on panel, IOSC can up to 4MHz

to 28MHz

Applications

• Mobile Phones

• Personal Digital Assistants

• Smart Hand-held or Gaming Devices

Figure 1. Package Types of AP386X

QFN-5×5-40

QFN-6×6-48

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