at75c220 ATMEL Corporation, at75c220 Datasheet - Page 94
at75c220
Manufacturer Part Number
at75c220
Description
Smart Internet Appliance Processor Siap
Manufacturer
ATMEL Corporation
Datasheet
1.AT75C220.pdf
(144 pages)
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USART Transmitter Time-guard Register
Name:
Access Type:Read/write
Reset Value: 0x0
•
USART Receive Pointer Register
Name:
Access Type:Read/write
Reset Value: 0x0
•
94
TG: Time-guard Value
RXPTR: Receive Pointer
Time-guard duration = TG x Bit period
RXPTR must be loaded with the address of the receive buffer.
1 - 255
TG
31
23
15
31
23
15
0
–
–
–
7
7
US_TTGR
US_RPR
Effect
Disables the TX time-guard function.
TXD is inactive high after the transmission of
each character for the time-guard duration.
30
22
14
30
22
14
–
–
–
6
6
AT75C220
29
21
13
29
21
13
–
–
–
5
5
28
20
12
28
20
12
–
–
–
4
4
RXPTR
RXPTR
RXPTR
RXPTR
TG
27
19
11
27
19
11
–
–
–
3
3
26
18
10
26
18
10
–
–
–
2
2
25
17
25
17
–
–
9
–
1
9
1
24
16
24
16
–
–
8
–
0
8
0
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