Gpio; Visualization Of Timing Parameters For The Strapping Pins - Espressif Systems ESP32-H2 Series Hardware Design Manuallines

2 Schematic Checklist
CHIP_EN
Strapping pin
Figure 9: Visualization of Timing Parameters for the Strapping Pins
Notice:
Please do not add high-value capacitors at GPIO9, otherwise the chip not boot successfully.

2.8 GPIO

The pins of ESP32-H2 series can be configured via IO MUX or GPIO matrix. IO MUX provides the default pin
configurations, whereas the GPIO matrix is used to route signals from peripherals to GPIO pins. For more
information about IO MUX and GPIO matrix, please refer to
MUX and GPIO Matrix.
Some peripheral signals can only be routed to certain GPIO pins, while some can be routed to any available
GPIO pins. For details, please refer to
When using GPIOs:
• Pay attention to the states of strapping pins during power-up.
• Pay attention to their default configurations after reset (refer to Table 4). It is recommended to add a pull-up
or pull-down resistor to pins in high-impedance state or enable the pull-up and pull-down during software
initialization to avoid extra power consumption.
Note:
The content below is excerpted from
Name
GPIO0
GPIO1
MTMS
Espressif Systems
t 0
V
IL_nRST
V
IH
ESP32-H2 Series Datasheet
ESP32-H2 Series Datasheet
Table 4: IO MUX Pin Functions
No. Function 0
3 GPIO0
4 GPIO1
5 MTMS
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t 1
ESP32-H2 Technical Reference Manual
> Section Peripheral Pin Configurations.
> Section Pins.
Function 1 Function 2
GPIO0 FSPIQ
GPIO1 FSPICS0
GPIO2 FSPIWP
14
ESP32-H2 Series Hardware Design Guidelines v0.5
> Chapter IO
Reset Notes
0 —
0 R
1 R