Espressif ESP32 Technical Reference Manual page 57

4 IO_MUX and GPIO Matrix (GPIO, IO_MUX)
Signal Input Signal
2 SPID_in
3 SPIHD_in
4 SPIWP_in
5 SPICS0_in
6 SPICS1_in
7 SPICS2_in
8 HSPICLK_in
9 HSPIQ_in
10 HSPID_in
11 HSPICS0_in
12 HSPIHD_in
13 HSPIWP_in
14 U0RXD_in
15 U0CTS_in
16 U0DSR_in
17 U1RXD_in
18 U1CTS_in
23 I2S0O_BCK_in
24 I2S1O_BCK_in
25 I2S0O_WS_in
26 I2S1O_WS_in
27 I2S0I_BCK_in
28 I2S0I_WS_in
29 I2CEXT0_SCL_in
30 I2CEXT0_SDA_in
31 pwm0_sync0_in
32 pwm0_sync1_in
33 pwm0_sync2_in
34 pwm0_f0_in
35 pwm0_f1_in
36 pwm0_f2_in
37 -
39 pcnt_sig_ch0_in0
40 pcnt_sig_ch1_in0
41 pcnt_ctrl_ch0_in0
42 pcnt_ctrl_ch1_in0
43 pcnt_sig_ch0_in1
44 pcnt_sig_ch1_in1
45 pcnt_ctrl_ch0_in1
46 pcnt_ctrl_ch1_in1
47 pcnt_sig_ch0_in2
48 pcnt_sig_ch1_in2
49 pcnt_ctrl_ch0_in2
Espressif Systems
Output Signal
SPID_out
SPIHD_out
SPIWP_out
SPICS0_out
SPICS1_out
SPICS2_out
HSPICLK_out
HSPIQ_out
HSPID_out
HSPICS0_out
HSPIHD_out
HSPIWP_out
U0TXD_out
U0RTS_out
U0DTR_out
U1TXD_out
U1RTS_out
I2S0O_BCK_out
I2S1O_BCK_out
I2S0O_WS_out
I2S1O_WS_out
I2S0I_BCK_out
I2S0I_WS_out
I2CEXT0_SCL_out
I2CEXT0_SDA_out
sdio_tohost_int_out
pwm0_out0a
pwm0_out0b
pwm0_out1a
pwm0_out1b
pwm0_out2a
pwm0_out2b
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57
Submit Documentation Feedback
Direct I/O in IO_MUX
YES
YES
YES
YES
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YES
YES
YES
YES
YES
YES
YES
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YES
YES
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ESP32 TRM (Version 5.2)