Atmel ARM-Based Evaluation Kit AT91SAM9N12-EK AT91SAM9N12-EK 数据表
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产品代码
AT91SAM9N12-EK
828
SAM9N12/SAM9CN11/SAM9CN12 [DATASHEET]
11063K–ATARM–05-Nov-13
40.8.18 USART Transmit Holding Register
Name:
US_THR
Addresses:
0xF801C01C (0), 0xF802001C (1), 0xF802401C (2), 0xF802801C (3)
Access:
Write-only
• 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.
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
TXSYNH
–
–
–
–
–
–
TXCHR
7
6
5
4
3
2
1
0
TXCHR