Espressif Systems ESP32-H2 Series Hardware Design Manuallines page 15

2 Schematic Checklist
Name
MTDO
MTCK
MTDI
GPIO8
GPIO9
GPIO10
GPIO11
GPIO12
XTAL_32K_P
XTAL_32K_N
GPIO22
U0RXD
U0TXD
GPIO25
GPIO26
GPIO27
Reset
The default configuration of each pin after reset:
• 0 - input disabled, in high impedance state (IE = 0)
• 1 - input enabled, in high impedance state (IE = 1)
• 2 - input enabled, pull-down resistor enabled (IE = 1, WPD = 1)
• 3 - input enabled, pull-up resistor enabled (IE = 1, WPU = 1)
• 4 - output enabled, pull-up registor enabled (OE = 1, WPU = 1)
• 1* - When the value of eFuse bit EFUSE_DIS_PAD_JTAG is
0, input enabled, pull-up resistor enabled (IE = 1, WPU = 1)
1, input enabled, in high impedance state (IE = 1)
• 3* - input enabled, pull-up resistor enabled (IE = 1, WPU = 0, USB_WPU = 1). See details in Notes
We recommend pulling high or low GPIO pins in high impedance state to avoid unnecessary power
consumption. You may add pull-up and pull-down resistors in your PCB design, or enable internal pull-up and
pull-down resistors during software initialization.
Notes
• R - These pins have analog functions.
• USB - The pull-up value of a USB pin is controlled by the pin's pull-up value together with the USB pull-up
value. If any of the two pull-up values is 1, the pin's pull-up resistor will be enabled. The pull-up resistors of
USB pins are controlled by the USB_SERIAL_JTAG_DP/DM_PULLUP bit, and the pull-up value is
Espressif Systems
No. Function 0
6 MTDO
7 MTCK
8 MTDI
10 GPIO8
11 GPIO9
12 GPIO10
13 GPIO11
14 GPIO12
15 GPIO13
16 GPIO14
21 GPIO22
22 U0RXD
23 U0TXD
24 GPIO25
25 GPIO26
26 GPIO27
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Function 1 Function 2
GPIO3 FSPIHD
GPIO4 FSPICLK
GPIO5 FSPID
GPIO8 —
GPIO9 —
GPIO10 —
GPIO11 —
GPIO12 —
GPIO13 —
GPIO14 —
GPIO22 —
GPIO23 FSPICS1
GPIO24 FSPICS2
GPIO25 FSPICS3
GPIO26 FSPICS4
GPIO27 FSPICS5
15
ESP32-H2 Series Hardware Design Guidelines v0.5
Reset Notes
1 R
1* R
1 R
1 —
3 —
0 R
0 R
0 —
0 R
0 R
0 —
3 —
4 —
1 —
1 R, USB
3* R, USB