0X4101: Uart Transmit Data Register (Uart_Txd) - Epson S1C17001 Technical Manual

18 UART

0x4101: UART Transmit Data Register (UART_TXD)

Register name Address Bit
UART Transmit 0x4101 D7–0 TXD[7:0]
Data Register (8 bits)
(UART_TXD)
D[7:0] TXD[7:0]: Transmit Data
Write transmit data to be set in the transmit data buffer. (Default: 0x0)
The UART begins transmitting when data is written to this register. Data written to TXD[7:0] is re-
tained until sent to the transmit data buffer.
Transmitting data from within the transmit data buffer generates a transmit buffer empty interrupt fac-
tor.
TXD7 (MSB) is invalid in 7-bit mode.
Serial converted data is output from the SOUT pin, with the LSB first bits set to 1 as High level and bits
set to 0 as Low level.
This register can also be read from.
226
Name Function
Transmit data
TXD7(6) = MSB
TXD0 = LSB
EPSON
Setting Init. R/W
0x0 to 0xff (0x7f) 0x0 R/W
S1C17001 TECHNICAL MANUAL
Remarks