GOODIX CONFIDENTIAL
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Contents
1. Description on Interface .......................................................................................................................................... 3
2. Communication Timings ......................................................................................................................................... 3
2.1 Timing for Write Operation ........................................................................................................................... 3
2.2 Timing for Read Operation ........................................................................................................................... 4
3. Register Map ........................................................................................................................................................... 4
3.1 Real-time Command (Write only) ................................................................................................................. 4
3.2 Configuration Information (R/W) ................................................................................................................. 5
3.3 Coordinate Information ............................................................................................................................... 13
3.4 Command Status Registers of GT911 ......................................................................................................... 17
3.5 Hotknot Status Registers ............................................................................................................................. 19
3.6 HotKnot Transmit Buffer ............................................................................................................................ 21
3.7 Hotknot Receive Buffer .............................................................................................................................. 22
4. Power-on Initialization and Modification on Register Value ................................................................................ 23
4.1 Power-On Timing of GT911 ....................................................................................................................... 23
4.2 I
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C Address Selection during Power-on or Reset Process ........................................................................... 24
4.3 Send Configuration after Power-on ............................................................................................................. 25
4.4 Register Value Modification ........................................................................................................................ 25
5. Coordinates Reading ............................................................................................................................................. 25
6.
Operation Modes Switchover ............................................................................................................................ 27
6.1
Operation Modes ......................................................................................................................................... 27
a)
Normal Mode ............................................................................................................................................ 27
b)
Green( Low Power) Mode ......................................................................................................................... 27
c)
Gesture Mode ............................................................................................................................................ 28
d)
Sleep Mode and Wakeup ........................................................................................................................... 28
e)
Approach Mode ......................................................................................................................................... 29
f)
Receive Mode ............................................................................................................................................ 29
g)
Send Mode ................................................................................................................................................ 29
7.
Host System Driver Modification in Gesture Mode .......................................................................................... 30
7.1
Enter Gesture Mode after Screen-off........................................................................................................... 30
7.2
Enter Sleep Mode after Screen-off .............................................................................................................. 30
7.3
Press Power (or Home) Key to Wake up Host ............................................................................................ 30
7.4
Recommended to Apply in Conjunction with IR ........................................................................................ 30
7.5
Hardware Circuit Modification ................................................................................................................... 30
8.
Reading Coordinate in Gesture Mode ............................................................................................................... 31
9.
Time Limit for Downloading HotKnot Firmware ............................................................................................. 31
10.
Revision History ................................................................................................................................................ 31
