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PDF FT5502 Data sheet ( Hoja de datos )
| Número de pieza | FT5502 | |
| Descripción | Capacitive Touch Panel Controller | |
| Fabricantes | FocalTech | |
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Product Data Sheet
Doc# : D-FT5502-1004 ( Version : 1.0 )
DDCN# : DC-1002003
Date: 26-Mar-10
FT5502
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
FocalTech Systems Co., Ltd
Page : 1 of 18
1 page  
Product Data Sheet
Doc# : D-FT5502-1004 ( Version : 1.0 )
DDCN# : DC-1002003
FT5502 can be divided into the following functional groups:
• 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.
• Left/Right Button Interface
• 8051 based MCU
8051 compatible MCU
Communication protocol software is implemented on this MCU to exchange data and control information with
the host processor
On chip OTP: a One Time Programmable (OTP) is implemented to store programs and some key parameters
• External Interface
PS/2: an interface for data exchange with host
I2C: an interface for data exchange with host
INT: an interrupt signal to inform the host processor that touch data is ready for read. It is only available in
the I2C mode
WAKE: an interrupt signal for the host to change F5502 from Hibernate to Active mode. It is only
available in the I2C 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:
Real time clock (RTC): A 32KHz RC oscillator
Timer: A number of timers are available to generate different clocks
Clock Manager: To control various clocks under different operation conditions of the system
FocalTech Systems Co., Ltd
Page : 5 of 18
5 Page 
Product Data Sheet
Doc# : D-FT5502-1004 ( Version : 1.0 )
DDCN# : DC-1002003
Power Supply Voltage 3
VPP
V -0.3 ~ +8
1
Input Voltage
Operating Temperature
Storage Temperature
Vt
Topr
Tstg
V -0.3 ~VDDA + 0.3
℃ -40 ~ +85
℃ -55 ~ +110
1
1, 4
1
Notes:
1. If used beyond the absolute maximum ratings, FT5502 may be permanently damaged. It is
strongly recommended that the device be used within the electrical characteristics in normal
operations. If exposed to the condition not within the electrical characteristics, it may affect the
reliability of the device.
2. Make sure VDDA1(high)≥VSSA1 (low)
3. Make sure VDDA2(high)≥VSSA2 (low)
℃4. The DC/AC characteristics of die and wafer products are guaranteed at 85
5.2. DC Characteristics
℃)Table 5-2 DC Characteristics (VDDA=VDDA1=VDDA2=2.6~3.3V, Ta=-40~85
Item
Input high-level voltage
Input low -level voltage
Output high -level voltage
Output low -level voltage
I/O leakage current
Current consumption
（ ）Normal operation mode
Current consumption
（ ）Monitor mode
Current consumption
（ ）Sleep mode
Symbol Unit
VIH V
Test Condition
VIL V
VOH
V IOH=-0.1mA
VOL
ILI
Iopr
Imon
Islp
V IOH=0.1mA
μA Vin=0~VDDA
℃VDDA1=VDDA2 = 2.8V
mA
Ta=25
VDDA1=VDDA2 = 2.8V
℃mA
Ta=25
m ℃VDDA1=VDDA2 = 2.8V
A
Ta=25
Min. Typ. Max. Note
0.8 x
VDDA
--
VDDA
-0.3
--
0.2 x
VDDA
0.8 x
VDDA
--
--
--
--
0.2 x
VDDA
-1 -- 1
-- 3 4.5
-- 2.4 --
-- 0.03 --
Step-up output voltage
V8X
V VDDA1=VDDA2 = 2.8V
18
20
--
Input voltage
VDDA2 V
2.8 -- 3.6
FocalTech Systems Co., Ltd
Page : 11 of 18
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet FT5502.PDF ] | |
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