FT800 Series Programmer Guide
Version 2.1
Document Reference No.: BRT_000030 Clearance No.: BRT#037
247
Copyright © Bridgetek Limited
6
FT801 operation
6.1
FT801 introduction
FT800 and FT801 share exactly the same graphics and audio feature sets. The touch
capabilities of the FT800 devices are designed for controlling touch on a resistive panel,
while FT801 is for capacitive touch and allows up to 5 touch points. Therefore, the FT801
has a different touch engine and touch control register set from the FT800. All the
registers which name starts with “REG_TOUCH” have been assigned to new name
“REG_CTOUCH”.
6.2
FT801 touch engine
The FT801 has the new Capacitive Touch Screen Engine(CTSE) built in with the following
features:
I
2
C interface to Capacitive Touch Panel Module(CTPM)
Support up to 5 touching points at the same time
Support CTPM with Focaltech FT5x06 series or Azotech IQS5xx series drive chip
Compatibility mode and Extended mode
By default, the FT801 touch engine works in compatibility mode and only one touching
point is detected. In extended mode, the FT801 touch engine can detect up to 5
touching points simultaneously.
6.3
FT801 touch registers
FT801 has re-defined the touch registers of the FT800 as below:
Register Definition 76
REG_CTOUCH_MODE Definition
31
2 1 0
REG_CTOUCH_MODE Definition
Address: 0x1024F0
Reset Value: 0x3
Bit 0 - 1 : The host can set these two bits to control the touch screen sampling
mode of the FT801 touch engine, as per:
00: Off mode. No sampling happens.
01: Not defined.
10: Not defined.
11: On Mode.
Bit 2 - 31: Reserved
R/W
Reserved
