571AMC000154DG Silicon Laboratories Inc, 571AMC000154DG Datasheet - Page 18

• Manufacturer Part Number: 571AMC000154DG
• Manufacturer: Silicon Laboratories Inc

Specifications of 571AMC000154DG

• Lead Free Status / Rohs Status: Compliant

Si570/Si571
Register 7. High Speed/N1 Dividers
Register 8. Reference Frequency
18
Name
Name
Type
Type
Bit
7:5
4:0
Bit
7:6
5:0
Bit
Bit
HS_DIV[2:0]
RFREQ[37:32]
N1[6:2]
Name
N1[1:0]
D7
D7
Name
N1[1:0]
R/W
HS_DIV[2:0]
DCO High Speed Divider.
Sets value for high speed divider that takes the DCO output f
000 = 4
001 = 5
010 = 6
011 = 7
100 = Not used.
101 = 9
110 = Not used.
111 = 11
CLKOUT Output Divider.
Sets value for CLKOUT output divider. Allowed values are [1] and [2, 4, 6, ..., 2
odd divider values will be rounded up to the nearest even value. The value for the N1 reg-
ister can be calculated by taking the divider ratio minus one. For example, to divide by 10,
write 0001001 (9 decimal) to the N1 registers.
0000000 = 1
1111111 = 2
R/W
D6
D6
CLKOUT Output Divider.
Sets value for CLKOUT output divider. Allowed values are [1, 2, 4, 6, ..., 2
divider values will be rounded up to the nearest even value. The value for the N1 regis-
ter can be calculated by taking the divider ratio minus one. For example, to divide by
10, write 0001001 (9 decimal) to the N1 registers.
0000000 = 1
1111111 = 2
Reference Frequency.
Frequency control input to DCO.
7
7
D5
D5
D4
D4
Rev. 1.2
Function
Function
D3
D3
RFREQ[37:32]
R/W
N1[6:2]
R/W
D2
D2
OSC
as its clock input.
D1
D1
7
]. Illegal odd
7
]. Illegal
D0
D0