AT91SAM9G45B-CU Datasheet, PDF (619/1185 Pages) ATMEL Corporation – AT91SAM ARM-based Embedded MPU

33.8.8 USART Transmit Holding Register
Name:
US_THR
Addresses:
0xFFF8C01C (0), 0xFFF9001C (1), 0xFFF9401C (2), 0xFFF9801C (3)
Access:
Write-only
31
30
29
28
27
26
25
–
–
–
–
–
–
–
23
22
21
20
19
18
17
–
–
–
–
–
–
–
15
14
13
12
11
10
9
TXSYNH
–
–
–
–
–
–
7
6
5
4
3
2
1
TXCHR
• TXCHR: Character to be Transmitted
Next character to be transmitted after the current character if TXRDY is not set.
• TXSYNH: Sync Field to be transmitted
0: The next character sent is encoded as a data. Start Frame Delimiter is DATA SYNC.
1: The next character sent is encoded as a command. Start Frame Delimiter is COMMAND SYNC.
24
–
16
–
8
TXCHR
0
SAM9G45 [DATASHEET]
6438K–ATARM–12-Feb-13
619