25 user input/output register – Rainbow Electronics AT91CAP9S250A User Manual
Page 829
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829
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
42.5.25
User Input/Output Register
Register Name:
EMAC_USRIO
Access Type:
Read/Write
• RMII
When set, this bit enables the RMII operation mode. When reset, it selects the MII mode.
• CLKEN
When set, this bit enables the transceiver input clock.
Setting this bit to 0 reduces power consumption when the treasurer is not used.
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
–
–
–
–
–
–
CLKEN
RMII
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