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PDF FT5202 Data sheet ( Hoja de datos )
| Número de pieza | FT5202 | |
| Descripción | Capacitive Touch Panel controller | |
| Fabricantes | FocalTech Systems | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de FT5202 (archivo pdf) en la parte inferior de esta página. Total 22 Páginas | ||
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Product Data Sheet
Doc# : D-FT5202-0902 ( Version : 1.0 )
DDCN# : 201001002
Date: 21-Jan-10
FT5202
Capacitive Touch Panel controller
FocalTech Systems Co., Ltd
THIS DOCUMENT CONTAINS INFORMATION PROPRIETARY TO FOCALTECH SYSTEMS
CO.,LTD., AND MAY NOT BE REPRODUCED, DISCLOSED OR USED IN WHOLE OR PART
WITHOUT THE EXPRESS WRITTEN PERMISSION OF FOCALTECH SYSTEMS CO.,LTD.
Copyright © 2010, FocalTech Systems CO.,Ltd
All rights reserved
Index
FocalTech Systems Co., Ltd
Page : 1 of 22
1 page  
Product Data Sheet
Doc# : D-FT5202-0902 ( Version : 1.0 )
FT5202 can be divided into the following functional groups:
DDCN# : 201001002
• Touch panel interface circuits
The main function for the AFE and AFE controller is to interface with the touch panel. It scans the panel
by sending AC signals to the panel and processes the received signals from the panel. So, it supports both
Transmit (TX) and Receive (RX) functions. Key parameters to configure this circuit can be sent via serial
interfaces, which will be explained in detail in a later section.
• 8051 based MCU
This MCU is 8051 compatible with some enhancements. For example, larger program and data memories
are supported. In addition, a Multiplier Accumulator (MAC) unit is implemented to speed up the touch
detection algorithms. Furthermore, a One Time Programmable (OTP) is implemented to store programs and
some key parameters.
Complex signal processing algorithms are implemented with firmware running on this MCU to further
process the received signals in order to detect the touches reliably. Communication protocol software is also
implemented on this MCU to exchange data and control information with the host processor.
The MCU executes the program stored in the on chip program memory (SRAM). Upon power-up, the
program can be downloaded (booted) from the following two sources:
On chip OTP
The FLASH connected to the host processor
The detailed boot procedure will be discussed later
• External Interface
I2C: an interface for data exchange with host
INT: an interrupt signal to inform the host processor that touch data is ready for read
WAKE: an interrupt signal for the host to change F5202 from Hibernate to Active mode
• A watch dog timer is implemented to ensure the robustness of the chip.
• A voltage regulator to generate 1.8V for digital circuits from the input 3.3V supply
4.2. MCU
This section describes some critical features and operations supported by the 8051 compatible MCU. Figure 4-2
shows the overall structure of the MCU block. In addition to the 8051 compatible MCU core, we have added the
following circuits:
MAC: A 16x8 multiplier with a 32 bit accumulator
Program memory: 20KB SRAM
Data memory: 4KB SRAM
Real time clock (RTC): A 32KHz RC oscillator
Timer: A number of timers are available to generate different clocks
Master clock: A 27MHz RC oscillator
FocalTech Systems Co., Ltd
Page : 5 of 22
5 Page 
Current consumption
（Sleep mode）
Step-up output voltage
Input voltage
Product Data Sheet
Doc# : D-FT5202-0902 ( Version : 1.0 )
DDCN# : 201001002
Islp
mA
VDDA1=VDDA2 = 2.8V
Ta=25℃
--
0.03 --
V8X
VDDA2
V
V
VDDA1=VDDA2 = 2.8V
18
2.8
20
--
--
3.6
5.3. AC Characteristics
Table 5-3 AC Characteristics of oscillators
Item
OSC clock 1
OSC clock 2
Symbol
fosc1
fosc2
Unit
MHz
KHz
Test Condition
VDDA2 = 2.8V
25℃
VDDA2 = 2.8V
Ta=25℃
Min. Typ.
25 27
29 32
Max.
29
35
Note
Table 5-4 AC Characteristics of TX & RX
Item Symbol Unit Test Condition Min. Typ. Max. Note
TX acceptable clock ftx KHz
100 150 270
TX output rise time
Ttxr nS
-- 20 --
TX output fall time
Ttxf nS
-- 20 --
RX input voltage
Trxi V
1.2
Notes:
DC/AC electrical characteristics of bare die and wafer products are guaranteed at +85℃.
--
1.5
FocalTech Systems Co., Ltd
Page : 11 of 22
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| PDF Descargar | [ Datasheet FT5202.PDF ] | |
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