Data Sheet

Appendix A
No. Description
13
*In Table GPIO_Matrix�the column “Default Value if unassigned” records the default value of
the an input signal if no GPIO is assigned to it. The actual value is determined by register
GPIO_FUNCm_IN_INV_SEL and GPIO_FUNCm_IN_SEL. (The value of m ranges from 1 to
255.)
A.2. GPIO_Matrix
Table 25: GPIO_Matrix
Signal
No. Input signals
Default
value if
unassigned*
Same input
signal from
IO_MUX core Output signals
Output enable of
output signals
0 SPICLK_in 0 yes SPICLK_out SPICLK_oe
1 SPIQ_in 0 yes SPIQ_out SPIQ_oe
2 SPID_in 0 yes SPID_out SPID_oe
3 SPIHD_in 0 yes SPIHD_out SPIHD_oe
4 SPIWP_in 0 yes SPIWP_out SPIWP_oe
5 SPICS0_in 0 yes SPICS0_out SPICS0_oe
6 SPICS1_in 0 no SPICS1_out SPICS1_oe
7 SPICS2_in 0 no SPICS2_out SPICS2_oe
8 HSPICLK_in 0 yes HSPICLK_out HSPICLK_oe
9 HSPIQ_in 0 yes HSPIQ_out HSPIQ_oe
10 HSPID_in 0 yes HSPID_out HSPID_oe
11 HSPICS0_in 0 yes HSPICS0_out HSPICS0_oe
12 HSPIHD_in 0 yes HSPIHD_out HSPIHD_oe
13 HSPIWP_in 0 yes HSPIWP_out HSPIWP_oe
14 U0RXD_in 0 yes U0TXD_out 1’d1
15 U0CTS_in 0 yes U0RTS_out 1’d1
16 U0DSR_in 0 no U0DTR_out 1’d1
17 U1RXD_in 0 yes U1TXD_out 1’d1
18 U1CTS_in 0 yes U1RTS_out 1’d1
23 I2S0O_BCK_in 0 no I2S0O_BCK_out 1’d1
24 I2S1O_BCK_in 0 no I2S1O_BCK_out 1’d1
25 I2S0O_WS_in 0 no I2S0O_WS_out 1’d1
26 I2S1O_WS_in 0 no I2S1O_WS_out 1’d1
27 I2S0I_BCK_in 0 no I2S0I_BCK_out 1’d1
28 I2S0I_WS_in 0 no I2S0I_WS_out 1’d1
29 I2CEXT0_SCL_in 1 no I2CEXT0_SCL_out 1’d1
30 I2CEXT0_SDA_in 1 no I2CEXT0_SDA_out 1’d1
31 pwm0_sync0_in 0 no sdio_tohost_int_out 1’d1
32 pwm0_sync1_in 0 no pwm0_out0a 1’d1
33 pwm0_sync2_in 0 no pwm0_out0b 1’d1
34 pwm0_f0_in 0 no pwm0_out1a 1’d1
Espressif Systems 53
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ESP32 Series Datasheet v3.5