S3C4510B
UART
UART TRANSMIT BUFFER REGISTER
The UART transmit buffer registers, UTXBUF0 and UTXBUF1, contain an 8-bit data value to be transmitted over
the UART channel.
Table 10-8. UXTBUF0 and UXTBUF1 Registers
Registers
UTXBUF0
Offset Address
0xD00C
R/W
W
Description
UART0 transmit buffer register
UART1 transmit buffer register
Reset Value
0xXX
UTXBUF1
0xE00C
W
0xXX
Table 10-9. UART Status Register Description
Bit Name Reset Value
Transmit data
Bit Number
This field contains the data to be transmitted over the single
channel UART.
[7:0]
When this register is written, the transmit buffer register empty bit
in the status register, USTAT[6], should be "1". This is to prevent
overwriting of transmit data that may already be present in the
UTXBUF.
Whenever the UTXBUF is written with a new value, the transmit
register empty bit, USTAT[6], is automatically cleared to "0".
31
8 7 6 5 4 3 2 1 0
Transmit Data
[7:0] Transmit data for UART
Figure 10-5. UART Transmit Buffer Registers
10-11
SAMSUNG [ SAMSUNG ]
