Usart transmitter time-guard register, Usart receive pointer register – Rainbow Electronics AT75C220 User Manual
Page 94
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AT75C220
94
USART Transmitter Time-guard Register
Name:
US_TTGR
Access Type:Read/write
Reset Value: 0x0
•
TG: Time-guard Value
Time-guard duration = TG x Bit period
USART Receive Pointer Register
Name:
US_RPR
Access Type:Read/write
Reset Value: 0x0
•
RXPTR: Receive Pointer
RXPTR must be loaded with the address of the receive buffer.
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
Effect
0
Disables the TX time-guard function.
1 - 255
TXD is inactive high after the transmission of
each character for the time-guard duration.
31
30
29
28
27
26
25
24
RXPTR
23
22
21
20
19
18
17
16
RXPTR
15
14
13
12
11
10
9
8
RXPTR
7
6
5
4
3
2
1
0
RXPTR
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