Ebyte ESP32-C3-MINI-1U User Manual page 6

Chengdu Ebyte Electronic Technology Co.,Ltd
36-53
3V3 3
4, 7, 9, 10,
15, 17, 24,
NC
25, 28, 29,
32-35
IO2 5
IO3 6
EN 8
IO0 12
IO1 13
IO10 16
IO4 18
IO5 19
IO6 20
IO7 21
IO8 22
IO9 23
IO18 26
IO19 27
RXD0 30
TXD0 31
1 P：Power；I：Input；O：Output；T：
Note：
Function
Download firmware/Output diary 1
AT Command/Respond 2
Please refer to AT Command Sets for more details.
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6
P
Power
—
Empty pins
I/O/T GPIO2, ADC1_CH2, FSPIQ
I/O/T GPIO3, ADC1_CH3
High level：chip enabled；Low level：chip
I
disabled
Note: Pin EN cannot be floated
I/O/T GPIO0, ADC1_CH0, XTAL_32K_P
I/O/T GPIO1, ADC1_CH1, XTAL_32K_N
I/O/T GPIO10, FSPICS0
I/O/T GPIO4, ADC1_CH4, FSPIHD, MTMS
I/O/T GPIO5, ADC2_CH0, FSPIWP, MTDI
I/O/T GPIO6, FSPICLK, MTCK
I/O/T GPIO7, FSPID, MTDO
I/O/T GPIO8
I/O/T GPIO9
I/O/T GPIO18, USB_D-
I/O/T GPIO19, USB_D+
I/O/T GPIO20, U0RXD
I/O/T GPIO21, U0TXD
Three-state logic.
Table 3- 2 Pins Definition
UARTO：GPIO20 (RX) ，
UART1：GPIO6(RX)，GPIO7(TX)，
GPIO5(CTS)，GPIO4(RTS)
Table 3- 3 ESP32-C3 series hardware connection pins
ESP Dev Pins
GPIO21(TX)
ESP32-C3-MINI-1U User Manual
Other device pins
PC：TX、RX
USB to UART module：TX，RX，
RTS，CTS