Diodes AP386X - Manual

Preliminary Datasheet
Superior Multi-touch Capacitive Touch Screen Controller AP386X
Aug. 2013 Rev. 1. 0 BCD Semiconductor Manufacturing Limited
1
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
2 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 2 C
• 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
2 C Slave Controller and SPI Slave
Controller Shared with the Same Ports

With Asynchronous I 2 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-6Ч6-48