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AP389X Datasheet(PDF) 1 Page - BCD Semiconductor Manufacturing Limited |
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AP389X Datasheet(HTML) 1 Page - BCD Semiconductor Manufacturing Limited |
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1 / 19 page  Data Sheet Enhanced Multi-touch Capacitive Touch Screen Controller AP389X Apr. 2013 Rev. 1. 0 BCD Semiconductor Manufacturing Limited 1 General Description The AP389X is a low-cost high-resolution single chip solution for APA capacitive touch screen. It is an 8-bit single cycle 8051 microcontroller with I 2C Interface. The chip includes 8-bit successive approximation analog-to-digital converters with an I 2C 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 (0.1pF to 4pF). On-chip capacitor can replace external component. This touch screen controller (TSC) with CMOS integration circuit provides an ideal choice for APA touch panel. The AP389X is specified over the temperature range of -40°C to 95°C. The AP389X is available in QFN-7×7-56 (for AP3890) and QFN-8×8-68 (for AP3891 and AP3892) packages. Features • Mutual Capacitive Touch Sensing • Dual Power Supply: 2.8V to 3.6V Operation Voltage; 1.6V to 2.0V Operation Voltage • Up to 30/38/36 Drive Lines and 17/22/23 Sense Lines • Dedicated Internal Two-wire Serial Control Bus I 2C and UART between AP389X and Host • Single-end Integrator with Programmable Gain Control and Offset Control • Multiplexed Analog Digitization with Two 8-bit Resolution Odd/Even 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 24MHz from IOSC (Zero Wait State); 48MHz from IOSC(With Wait State) 4MHz to 48MHz Internal Oscillator (IOSC) 64K-byte Flash ROM 256-byte Internal SRAM and 12032-byte XSRAM Extra XSRAMs for AFE: 896×12-bit×2 XSRAM for 8-bit SAR ADC 896×8-bit XSRAM for 8-bit Parasitical Capacitor Compensator Two 16-bit Timers T0/T1 and One 16-bit ECT Timer T2 One I 2C Slave Controller and One I2C Master Controller Shared with the Same Port With Asynchronous I 2C Slave Address Detection Logic Design 4 General Purpose GPIO Pins One External Interrupt Pin One UART Data Transfer Output Pin • ISP/IAP via I²C Port • Operation Temperature Range: -40°C to 95°C • Package Types: QFN-7×7-56 and QFN-8×8-68 • RoHS Compliance • Operating Mode: Mode Description Power-down No scan with power-down mode Standard Higher scan rate when fingers are on panel, IOSC can up to 4MHz to 48MHz Applications • Mobile Phones • Personal Digital Assistants • Smart Hand-held or Gaming Devices Figure 1. Package Types of AP389X QFN-7×7-56 QFN-8×8-68 |
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