cy28rs680 SpectraLinear Inc, cy28rs680 Datasheet - Page 8

• Manufacturer Part Number: cy28rs680
• Description: Clock Generator For Ati Rs5xx/6xx Chipsets
• Manufacturer: SpectraLinear Inc

Rev 1.0, March 28, 2007
Byte 8: SRC PLL (PLL3) Overclocking Register
Byte 9: Clock Request Mapping Register
Byte 10: Dynamic Frequency Register4
Bit
Bit
Bit
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
@Pup
@Pup
@Pup
0
1
1
0
1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
0
1
0
0
SMSW_SEL_Bypass
SMSW_SEL
CLKREQC#
CLKREQC#
CLKREQC#
CLKREQC#
Diff_VOUT2
Diff_VOUT1
Diff_VOUT0
CLKREQB#
CLKREQB#
CLKREQB#
CLKREQB#
SRC_N[7]
SRC_N[6]
SRC_N[5]
SRC_N[4]
SRC_N[3]
SRC_N[2]
SRC_N[1]
SRC_N[0]
Reserved
Reserved
Reserved
Name
Name
Name
Reserved
Reserved
Reserved
N counter Control bit [7:0]
N counter Control bit [7:0]
N counter Control bit [7:0]
N counter Control bit [7:0]
N counter Control bit [7:0]
N counter Control bit [7:0]
N counter Control bit [7:0]
N counter Control bit [7:0]
CLKREQC# Controls ATIG3
0 = Not controlled, 1 = Controlled
CLKREQC# Controls ATIG2
0 = Not controlled, 1 = Controlled
CLKREQC# Controls ATIG1
0 = Not controlled, 1 = Controlled
CLKREQC# Controls ATIG0
0 = Not controlled, 1 = Controlled
CLKREQB# Controls SRC7
0 = Not controlled, 1 = Controlled
CLKREQB# Controls SRC6
0 = Not controlled, 1 = Controlled
CLKREQB# Controls SRC5
0 = Not controlled, 1 = Controlled
CLKREQB# Controls SRC4
0 = Not controlled, 1 = Controlled
Differential Output Level Setting
Diff_VOUT [2:0]
111 = 0.96V
110 = 0.93V
101 = 0.90V default
100 = 0.86V
011 = 0.82V
010 = 0.77V
001 = 0.71V
000 = 0.63V
Smooth switch on/off
0 = On 1 = Off
Smooth Switch Select
0 = Select CPU_PLL (PLL1). 1 = Select ATIG_PLL (PLL2)
Description
Description
Description
CY28RS680
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