ESP32 Pin IO13 Multiplexing Options

D

dacre

Can you tell me what are all the multiplexed alternatives for pin IO13 (pin 16) of @ESP1?

flux

For ESP1, pin 16 = IO13 can be multiplexed as:

Table

SignalFunction
GPIO13General-purpose I/O
ADC2_CH4ADC2 channel 4
TOUCH4Capacitive touch input 4
RTC_GPIO14RTC-domain GPIO 14
MTCKJTAG test clock
HSPIDHSPI data in
HS2_DATA3SD/SDIO host data bit 3
SD_DATA3SD card data bit 3
EMAC_RX_EREthernet MAC receive error
If you want, I can also list the boot-strapping / caution notes for ESP1 IO13, since some alternate functions can affect bring-up or debugging.
IO13 caution notes
More ESP1 pin mux
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Files

Schematic

Layout

3D View

U2
Manufacturer Part Number
NS4150B
C36
Capacitance
0.1uF
C37
Capacitance
0.1uF
C39
Capacitance
22pF
C31
Capacitance
1uF
C38
Capacitance
22pF
R24
Resistance
10kΩ
R25
Resistance
150kΩ
R26
Resistance
150kΩ

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