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1745D–ATARM–04-Nov-05
AT91M55800A
18.10.10 USART Receiver Time-out Register
Name: US_RTOR
Access Type: Read/Write
Reset State: 0
Offset: 0x24
• TO: Time-out Value
When a value is written to this register, a Start Time-out Command is automatically performed.
Time-out duration = TO x 4 x Bit period
18.10.11 USART Transmitter Time-guard Register
Name: US_TTGR
Access Type: Read/Write
Reset State: 0
Offset: 0x28
• TG: Time-guard Value
Time-guard duration = TG x Bit period
31 30 29 28 27 26 25 24
– – – – – – – –
23 22 21 20 19 18 17 16
– – – – – – – –
15 14 13 12 11 10 9 8
– – – – – – – –
7 6 5 4 3 2 1 0
TO
TO
0 Disables the RX Time-out function.
1 - 255
The Time-out counter is loaded with TO when the Start Time-out Command is given or when each new data character is
received (after reception has started).
31 30 29 28 27 26 25 24
– – – – – – – –
23 22 21 20 19 18 17 16
– – – – – – – –
15 14 13 12 11 10 9 8
– – – – – – – –
7 6 5 4 3 2 1 0
TG
TG
0 Disables the TX Time-guard function.
1 - 255 TXD is inactive high after the transmission of each character for the time-guard duration.