AT75C220 Datasheet, PDF (83/144 Pages) ATMEL Corporation – Smart Internet Appliance Processor(SIAP)

AT75C220
USART Control Register
Name:
US_CR
Access Type:Write-only
Reset Value:Undefined
31
30
29
28
27
26
25
24
–
–
–
–
–
–
–
–
23
22
21
20
19
18
17
16
–
–
–
–
–
–
–
–
15
14
13
12
11
10
9
8
–
–
–
SENDA
STTTO
STPBRK
STTBRK
RSTSTA
7
6
5
4
3
2
1
0
TXDIS
TXEN
RXDIS
RXEN
RSTTX
RSTRX
–
–
• RSTRX: Reset Receiver
0 = No effect.
1 = The receiver logic is reset.
• RSTTX: Reset Transmitter
0 = No effect.
1 = The transmitter logic is reset.
• RXEN: Receiver Enable
0 = No effect.
1 = The receiver is enabled if RXDIS is 0.
• RXDIS: Receiver Disable
0 = No effect.
1 = The receiver is disabled.
• TXEN: Transmitter Enable
0 = No effect.
1 = The transmitter is enabled if TXDIS is 0.
• TXDIS: Transmitter Disable
0 = No effect.
1 = The transmitter is disabled.
• RSTSTA: Reset Status Bits
0 = No effect.
1 = Resets the status bits PARE, FRAME, OVRE and RXBRK in the US_CSR.
• STTBRK: Start Break
0 = No effect.
1 = If break is not being transmitted, starts transmission of a break after the characters present in US_THR and the
Transmit Shift Register have been transmitted.
• STPBRK: Stop Break
0 = No effect.
1 = If a break is being transmitted, stops transmission of the break after a minimum of one character length and trans-
mits a high level during 12 bit periods.
• STTTO: Start Time-out
0 = No effect.
1 = Starts waiting for a character before clocking the time-out counter.
• SENDA: Send Address
0 = No effect.
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