Espressif ESP32 Technical Reference Manual page 61

4 IO_MUX and GPIO Matrix (GPIO, IO_MUX)
Signal Input Signal
195 I2S1I_H_ENABLE
196 -
197 -
198 U2RXD_in
199 U2CTS_in
200 emac_mdc_i
201 emac_mdi_i
202 emac_crs_i
203 emac_col_i
204 pcmfsync_in
205 pcmclk_in
206 pcmdin
207 -
208 -
209 -
210 -
211 -
212 -
213 -
214 -
215 -
224 -
225 -
226 -
227 -
228 -
Direct I/O in IO_MUX "YES" means that this signal is also available directly via IO_MUX. To apply the GPIO Matrix
to these signals, their corresponding SIG_IN_SEL register must be cleared.
4.10 IO_MUX Pad List
Table 4-3 shows the IO_MUX functions for each I/O pad:
GPIO Pad Name Function 0
0 GPIO0 GPIO0
1 U0TXD U0TXD
2 GPIO2 GPIO2
3 U0RXD U0RXD
4 GPIO4 GPIO4
5 GPIO5 GPIO5
6 SD_CLK SD_CLK
7 SD_DATA_0 SD_DATA0
8 SD_DATA_1 SD_DATA1
9 SD_DATA_2 SD_DATA2
10 SD_DATA_3 SD_DATA3
Espressif Systems
Output Signal
-
-
-
U2TXD_out
U2RTS_out
emac_mdc_o
emac_mdo_o
emac_crs_o
emac_col_o
bt_audio0_irq
bt_audio1_irq
bt_audio2_irq
ble_audio0_irq
ble_audio1_irq
ble_audio2_irq
pcmfsync_out
pcmclk_out
pcmdout
ble_audio_sync0_p
ble_audio_sync1_p
ble_audio_sync2_p
sig_in_func224
sig_in_func225
sig_in_func226
sig_in_func227
sig_in_func228
Table 4-3. IO_MUX Pad Summary
Function 1 Function 2 Function 3
CLK_OUT1 GPIO0 -
CLK_OUT3 GPIO1 -
HSPIWP GPIO2 HS2_DATA0
CLK_OUT2 GPIO3 -
HSPIHD GPIO4 HS2_DATA1
VSPICS0 GPIO5 HS1_DATA6
SPICLK GPIO6 HS1_CLK
SPIQ GPIO7 HS1_DATA0
SPID GPIO8 HS1_DATA1
SPIHD GPIO9 HS1_DATA2
SPIWP GPIO10 HS1_DATA3
61
Submit Documentation Feedback
Direct I/O in IO_MUX
-
-
-
YES
YES
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Function 4 Function 5
- EMAC_TX_CLK
- EMAC_RXD2
SD_DATA0 -
- -
SD_DATA1 EMAC_TX_ER
- EMAC_RX_CLK
U1CTS -
U2RTS -
U2CTS -
U1RXD -
U1TXD -
ESP32 TRM (Version 5.2)
Reset Notes
3 R
3 -
2 R
3 -
2 R
3 -
3 -
3 -
3 -
3 -
3 -