7 pmc utmi clock configuration register – Rainbow Electronics AT91CAP9S250A User Manual
Page 371
371
6264A–CAP–21-May-07
AT91CAP9S500A/AT91CAP9S250A
29.9.7
PMC UTMI Clock Configuration Register
Register Name:
CKGR_UCKR
Access Type:
Read/Write
• UPLLEN: UTMI PLL Enable
0 = The UTMI PLL is disabled.
1 = The UTMI PLL is enabled.
When UPLLEN is set, the LOCKU flag is set once the UTMI PLL startup time is achieved.
• PLLCOUNT: UTMI PLL Start-up Time
Specifies the number of Slow Clock cycles multiplied by 8 for the UTMI PLL start-up time. Should be set to 2.
• BIASEN: UTMI BIAS Enable
0 = The UTMI BIAS is disabled.
1 = The UTMI BIAS is enabled.
• BIASCOUNT: UTMI BIAS Start-up Time
Specifies the number of Slow Clock cycles for the UTMI BIAS start-up time. Should be set to 2.
31
30
29
28
27
26
25
24
BIASCOUNT
–
–
–
BIASEN
23
22
21
20
19
18
17
16
PLLCOUNT
–
–
–
UPLLEN
15
14
13
12
11
10
9
8
–
–
–
–
–
–
–
–
7
6
5
4
3
2
1
0
–
–
–
–
–
–
–
–