at75c220 ATMEL Corporation, at75c220 Datasheet - Page 92
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 Baud Rate Generator Register
Name:
Access Type:Read/write
Reset Value: 0x0
•
Note:
Note:
92
CD: Clock Divisor
This register has no effect if synchronous mode is selected with an external clock.
2 to 65535
31
23
15
–
–
7
CD
In synchronous mode, the value programmed must be even to ensure a 50:50 mark-to-space ratio.
Clock divisor bypass (CD = 1) must not be used when internal clock ACLK is selected (USCLKS = 0).
0
1
US_BRGR
Effect
Disables clock
Clock divisor bypass
Baud rate (asynchronous mode) = Selected clock/(16 x CD)
Baud rate (synchronous mode) = Selected clock/CD
30
22
14
–
–
6
AT75C220
29
21
13
–
–
5
28
20
12
–
–
4
CD
CD
27
19
11
–
–
3
26
18
10
–
–
2
25
17
–
–
9
1
24
16
–
–
8
0
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