Datasheet

 2012 Microchip Technology Inc. DS41663A-page 15
MTCH6301 PROJECTED CAPACITIVE TOUCH CONTROLLER
FIGURE 5-7: I
2
C™ COMMAND READ AND WRITE
5.7.6 TYPICAL I
2
C TOUCH PACKET READ
Figure 5-8 depicts a single touch packet being
streamed from the controller. In this case, touch ID 0 at
location (1940,2592).
FIGURE 5-8: I
2
C™ TOUCH PACKET READ
5.7.7 WAKE ON I
2
C
The MTCH6301 is capable of waking up upon receiving
an I
2
C command from the host. Note that since
wake-up time can take up to 350 µs, the controller must
resend any I
2
C bytes that were not acknowledged
(ACK) before continuing the transmission.
Since the controller will wake up upon a correct I
2
C
address match, it does not matter which command is
sent. For simplicity, the Enable Touch command is
recommended.
SDA
SCL
Start Stop
INT
DATA
554A 03 16 00 01
SDA
SCL
Start Stop
INT
DATA
054B 55 03 00 0C16
Master Write
Master Read
(Controller Response)
SDA
SCL
Start Stop
INT
DATA
054B 81 14 0F 1420