Espressif ESP32 Technical Reference Manual page 374

13 UART Controller (UART)
31
0 0 0 0 0 0 0
UART_RS485_TX_DLY_NUM This register is used to delay the transmitter's internal data signal.
(R/W)
UART_RS485_RX_DLY_NUM This register is used to delay the receiver's internal data signal. (R/W)
UART_RS485RXBY_TX_EN 1: enable the RS-485 transmitter to send data, when the RS-485 receiver
line is busy; 0: the RS-485 transmitter should not send data, when its receiver is busy. (R/W)
UART_RS485TX_RX_EN Set this bit to enable the transmitter's output signal loop back to the re-
ceiver's input signal. (R/W)
UART_DL1_EN Set this bit to delay the STOP bit by 1 bit. (R/W)
UART_DL0_EN Set this bit to delay the STOP bit by 1 bit after DL1. (R/W)
UART_RS485_EN Set this bit to choose the RS-485 mode. (R/W)
31
0 0 0 0 0 0 0
UART_PRE_IDLE_NUM This register is used to configure the idle-time duration before the first
at_cmd is received by the receiver. When the duration is less than what this register indicates,
it will not take the next data received as an at_cmd char. (R/W)
Espressif Systems
Register 13.18. UART_RS485_CONF_REG (0x44)
0 0 0 0 0 0 0 0
Register 13.19. UART_AT_CMD_PRECNT_REG (0x48)
24 23
0
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10 9
0 0 0 0 0 0 0 0
0x0186A00
374
6 5 4 3 2 1
0 0 0 0 0 0 0 0
ESP32 TRM (Version 5.2)
0
0 Reset
0
Reset