Datasheet

STMPE811 Touchscreen controller
Doc ID 14489 Rev 6 41/65
FIFO_TH FIFO threshold
Address: 0x4A
Type: R/W
Reset: 0x00
Description:
Triggers an interrupt upon reaching or exceeding the threshold value. This field must not be set
as zero.
FIFO_STA FIFO status
Address: 0x4B
Type: R/W
Reset: 0x20
Description:
Current status of FIFO..
76543 2 1 0
FIFO_TH
[7:0] FIFO_TH: touchscreen controller FIFO threshold
765432 1 0
FIFO_OFLOW FIFO_FULL FIFO_EMPTY FIFO_TH_TRIG RESERVED FIFO_RESET
[7] FIFO_OFLOW:
Reads 1 if FIFO is overflow
[6] FIFO_FULL:
Reads 1 if FIFO is full
[5] FIFO_EMPTY:
Reads 1 if FIFO is empty
[4] FIFO_TH_TRIG:
0 = Current FIFO size is still below the threshold value
1 = Current FIFO size is at or beyond the threshold value
[3:1] RESERVED
[0] FIFO_RESET:
Write '0' : FIFO put out of reset mode
Write '1' : Resets FIFO. All data in FIFO are cleared.
When TSC is enabled, FIFO resets automatically.