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STMPE321QTR bảng dữ liệu(PDF) 24 Page - STMicroelectronics

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STMPE321QTR bảng dữ liệu(HTML) 24 Page - STMicroelectronics

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Capacitive touch module registers
STMPE321
24/40
Doc ID 15791 Rev 3
8
Capacitive touch module registers
TOUCH_FIFO
Touch FIFO
Address:
0x19, 0x18
Type:
R
Reset:
0x00
Description:
TOUCH_FIFO is the access port for the internal 4-level FIFO used for buffering the
touch events. While it is possible to access each byte in the data structure directly, it is
recommended that the FIFO is accessed only via the 0x18 address.
The FIFO must be accessed in multiples of 2 bytes (LSB, MSB). For the STMPE321,
MSB is reserved and LSB contains a snapshot of the recent touch event.
Where Tn is touch status of touch sensing channel n.
Table 10.
TOUCH_FIFO summary table
Address
Function
0x18
FIFO-0, LSB
0x19
FIFO-0, MSB
0x1A
FIFO-1, LSB
0x1B
FIFO-1, MSB
0x1C
FIFO-2, LSB
0x1D
FIFO-2, MSB
0x1E
FIFO-3, LSB
0x1F
FIFO-3, MSB
76
543
2
1
0
T7
T6
T5
T4
T3
T2
T1
T0



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