STMPE812 datasheet(33/51 Pages) STMICROELECTRONICS

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STMPE812

Touchscreen controller

Doc ID 17732 Rev 3

33/51

TSC detect config

TSC detection configuration 1 register

Address:

0x41

Type:

R/W

Reset:

0xA4

Description:

Touchscreen controller detection configuration 1 register.

7654

PenStrength[1:0]

TDetDly[2:0]

Settling[2:0]

1010

[7:6] PenStrength[1:0]

Pen detect strength threshold

‘00’ – least sensitive (50 K pull-up)

‘01’ – sensitive (40 K pull-up)

‘10’ – more sensitive (30 K pull-up) - Default

‘11’ – most sensitive (20 K pull-up)

[5:3] TDetDly[2:0]

Touch detect delay

‘000’ = 40 µs

‘001’ = 80 µs

‘010’ = 160 µs

‘011’ = 320 µs

‘100’ = 640 µs - Default

‘101’ = 1.28 ms

‘110’ = 2.56 ms

‘111’ = 5.12 ms

[2:0] Settling[2:0]

Panel driver settling time

‘000’ = 40 µs

‘001’ = 80 µs

‘010’ = 160 µs

‘011’ = 320 µs/ns

‘100’ = 640 µs - Default

‘101’ = 1.28 ms

‘110’ = 2.56 ms

‘111’ = 5.12 ms

For large panels (> 6 inches), a capacitor of 10 nF is recommended at the touchscreen

terminals for noise filtering. In this case, settling time of 1 ms or more is recommended.

Obsolete

Product(s)

- Obsolete

Product(s)

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