Espressif ESP32 Technical Reference Manual page 373

13 UART Controller (UART)
31
0x013
UART_XOFF_CHAR This register stores the Xoff flow control char. (R/W)
UART_XON_CHAR This register stores the Xon flow control char. (R/W)
UART_XOFF_THRESHOLD When the data amount in receive-FIFO is more than what this register
indicates, it will send an Xoff char, with uart_sw_flow_con_en set to 1. (R/W)
UART_XON_THRESHOLD When the data amount in receive-FIFO is less than what this register indi-
cates, it will send an Xon char, with uart_sw_flow_con_en set to 1. (R/W)
31 28 27
0 0 0 0
UART_TX_BRK_NUM This register is used to configure the number of zeros (0) sent, after the pro-
cess of sending data is completed. It is active when txd_brk is set to 1. (R/W)
UART_TX_IDLE_NUM This register is used to configure the duration between transfers. (R/W)
UART_RX_IDLE_THRHD When the receiver takes more time to receive Byte data than what this reg-
ister indicates, it will produce a frame-end signal. (R/W)
Espressif Systems
Register 13.16. UART_SWFC_CONF_REG (0x3C)
24 23
0x011
Register 13.17. UART_IDLE_CONF_REG (0x40)
20 19
0x00A
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16 15
0x0E0
10 9
0x100
373
8 7
0x000
0x100
ESP32 TRM (Version 5.2)
0
Reset
0
Reset