AN3299 Datasheet, PDF (5/13 Pages) STMicroelectronics – A hardware and software guide for the STMPE801

AN3299
Hardware
1.1.2
Reset pin recommendation
The following is a few examples of configurations at the reset pin.
● If a reset delay is desired (recommended) upon power up, an RC delay can be
connected to the reset as shown below.
Figure 2.
RSTB connectivity recommendation 1
6n 6
34-0%
6##
2ESET
!-V
● If external reset assertion is required through CPU/baseband, RSTB can be connected
to the GPIO. The diagram below shows the presence of a weak pull-up resistor
assuming CPU/baseband control is open drain. The minimum pulse width of the
external reset signal is 100 µs.
Figure 3. RSTB connectivity recommendation 2
1.65 V – 3.6 V
STMPE801
CPU control
10 kΩ
VCC
Reset
AM08426v1
● If reset delay and external reset assertion, as shown in case1 and case2 above, are not
required, it is recommended to short the reset pin to VCC through a low resistor of 0.1
Ω - 100 Ω.
Doc ID 18113 Rev 1
5/13