932S806
Clock Chip for 2 and 4-way AMD K8-based servers
Recommended Application:
Serverworks HT2100-based systems using AMD K8
processors
Output Features:
•
6 - Pairs of AMD K8 clocks
•
5 - Pairs of SRC/PCI Express* clock
•
3 - 14.318MHz REF clocks
•
3 - 48MHz clocks
•
1 - PCI 33MHz clocks
•
1 - HTT 66MHz clock
•
4 - 25MHz clocks
Features:
•
Spread Spectrum for EMI reduction
•
Outputs may be disabled via SMBus
•
M/N programming via SMBus
•
Uses 14.318MHz XTAL
Pin Configuration
X1
X2
VDDREF
FS0/REF0
FS1/REF1
FS2/REF2
GNDREF
VDD48
48MHz_0
48MHz_1
48MHz_2
GND48
SCLK
SDATA
VDDPCI
PCICLK0
GNDPCI
PD#
VDDHTT
HTTCLK0
GNDHTT
VDDA
GNDA
IREF
VDDSRC
SRCCLKT0
SRCCLKC0
SRCCLKT1
SRCCLKC1
SRCCLKT2
SRCCLKC2
VDDSRC
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
64
63
62
61
60
59
58
57
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
VDD25MHz
25MHz_0
25MHz_1
25MHz_2
25MHz_3
GND25MHz
SPREAD_EN
CPUCLK8T5
CPUCLK8C5
VDDCPU
GNDCPU
CPUCLK8T4
CPUCLK8C4
CPUCLK8T3
CPUCLK8C3
VDDCPU
GNDCPU
CPUCLK8T2
CPUCLK8C2
CPUCLK8T1
CPUCLK8C1
VDDCPU
GNDCPU
CPUCLK8T0
CPUCLK8C0
NC
VDDSRC
SRCCLKT4
SRCCLKC4
SRCCLKT3
SRCCLKC3
GNDSRC
Functionality
Byte 0
Bit2-FS2 Bit1-FS1 Bit0-FS0
0
0
0
0
0
1
0
1
0
0
1
1
1
0
0
1
0
1
1
1
0
1
1
1
CPU-(MHz)
Hi-Z
X/6
180.00
220.00
100.00
133.33
166.67
200.00
Power Groups
Pin Number
Description
VDD
GND
8
12
48MHz Clocks
64
61
25MHz Clocks
15
17
33 MHz PCI Clock
19
21
66 MHz HTT Clock
22
23
IREF, Analog Core
25, 32, 38
33
SRC clocks
55, 49, 43 54, 48, 42
K8 CPU Clocks
3
7
REF Clocks, Xtal Osc.
64-TSSOP
* Internal Pull-Up Resistor
** Internal Pull-Down Resistor
1143A—07/27/06
*Other names and brands may be claimed as the property of others.
932S806
932S806
Pin Description
PIN #
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
X1
X2
VDDREF
FS0/REF0
FS1/REF1
FS2/REF2
GNDREF
VDD48
48MHz_0
48MHz_1
48MHz_2
GND48
SCLK
SDATA
VDDPCI
PCICLK0
GNDPCI
PD#
VDDHTT
HTTCLK0
GNDHTT
VDDA
GNDA
IREF
VDDSRC
SRCCLKT0
SRCCLKC0
SRCCLKT1
SRCCLKC1
SRCCLKT2
SRCCLKC2
VDDSRC
PIN NAME
TYPE
IN
OUT
PWR
I/O
I/O
I/O
PWR
PWR
OUT
OUT
OUT
PWR
IN
I/O
PWR
OUT
PWR
IN
PWR
OUT
PWR
PWR
PWR
OUT
PWR
OUT
OUT
OUT
OUT
OUT
OUT
PWR
DESCRIPTION
Crystal input, Nominally 14.318MHz.
Crystal output, Nominally 14.318MHz
Ref, XTAL power supply, nominal 3.3V
Frequency select latch input pin / 14.318 MHz reference clock.
Frequency select latch input pin / 14.318 MHz reference clock.
Frequency select latch input pin / 14.318 MHz reference clock.
Ground pin for the REF outputs.
Power pin for the 48MHz output.3.3V
48MHz clock output.
48MHz clock output.
48MHz clock output.
Ground pin for the 48MHz outputs
Clock pin of SMBus circuitry, 5V tolerant.
Data pin for SMBus circuitry, 5V tolerant.
Power supply for PCI clocks, nominal 3.3V
PCI clock output.
Ground pin for the PCI outputs
Asynchronous active low input pin used to power down the device. The
internal clocks are disabled and the VCO and the crystal are stopped.
Supply for HTT clocks, nominal 3.3V.
3.3V Hyper Transport output
Ground pin for the HTT outputs
3.3V power for the PLL core.
Ground pin for the PLL core.
This pin establishes the reference current for the differential current-mode
output pairs. This pin requires a fixed precision resistor tied to ground in
order to establish the appropriate current. 475 ohms is the standard value.
Supply for SRC clocks, 3.3V nominal
True clock of differential SRC clock pair.
Complement clock of differential SRC clock pair.
True clock of differential SRC clock pair.
Complement clock of differential push-pull SRC clock pair.
True clock of differential SRC clock pair.
Complement clock of differential SRC clock pair.
Supply for SRC clocks, 3.3V nominal
1143A—07/27/06
2
932S806
Pin Description (continued)
PIN #
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
PIN NAME
GNDSRC
SRCCLKC3
SRCCLKT3
SRCCLKC4
SRCCLKT4
VDDSRC
NC
CPUCLK8C0
CPUCLK8T0
GNDCPU
VDDCPU
CPUCLK8C1
CPUCLK8T1
CPUCLK8C2
CPUCLK8T2
GNDCPU
VDDCPU
CPUCLK8C3
CPUCLK8T3
CPUCLK8C4
CPUCLK8T4
GNDCPU
VDDCPU
CPUCLK8C5
CPUCLK8T5
SPREAD_EN
GND25MHz
25MHz_3
25MHz_2
25MHz_1
25MHz_0
VDD25MHz
TYPE
PWR
OUT
OUT
OUT
OUT
PWR
N/A
OUT
OUT
PWR
PWR
OUT
OUT
OUT
OUT
PWR
PWR
OUT
OUT
OUT
OUT
PWR
PWR
OUT
OUT
IN
PWR
OUT
OUT
OUT
OUT
PWR
DESCRIPTION
Ground pin for the SRC outputs
Complement clock of differential SRC clock pair.
True clock of differential SRC clock pair.
Complement clock of differential SRC clock pair.
True clock of differential SRC clock pair.
Supply for SRC clocks, 3.3V nominal
No Connection.
Complementary clock of differential 3.3V push-pull K8 pair.
True clock of differential 3.3V push-pull K8 pair.
Ground pin for the CPU outputs
Supply for CPU clocks, 3.3V nominal
Complementary clock of differential 3.3V push-pull K8 pair.
True clock of differential 3.3V push-pull K8 pair.
Complementary clock of differential 3.3V push-pull K8 pair.
True clock of differential 3.3V push-pull K8 pair.
Ground pin for the CPU outputs
Supply for CPU clocks, 3.3V nominal
Complementary clock of differential 3.3V push-pull K8 pair.
True clock of differential 3.3V push-pull K8 pair.
Complementary clock of differential 3.3V push-pull K8 pair.
True clock of differential 3.3V push-pull K8 pair.
Ground pin for the CPU outputs
Supply for CPU clocks, 3.3V nominal
Complementary clock of differential 3.3V push-pull K8 pair.
True clock of differential 3.3V push-pull K8 pair.
Asynchronous, active high input to enable spread spectrum functionality.
Ground pin for the 25Mhz outputs
25MHz clock output, 3.3V
25MHz clock output, 3.3V
25MHz clock output, 3.3V
25MHz clock output, 3.3V
Power supply for 25MHz clocks, 3.3V nominal.
1143A—07/27/06
3
932S806
General Description
The
932S806
is a main clock synthesizer chip for AMD K8-based servers.
An SMBus interface allows full control of the device.
Block Diagram
REF(2:0)
X1
X2
XTAL
OSC.
FIXED PLL
25M
DIV
48MHz(2:0)
25MHz(3:0)
CPU
DIV
CPUCLK8(5:0)
PLL Array
FS(2:0)
PD#
SPREAD_EN
SDATA
SCLK
HTT
DIV
HTTCLK
CONTROL
LOGIC
PCI33
DIV
PCICLK
SRC
DIV1
SRCCLK(4:0)
Single-ended Terminations
Single-ended
Number of
Series Resistor for Proper Termination
Output Strength Loads on Board
Zo = 50 ohms Zo = 55 ohms Zo = 60 ohms
48MHz 1 Load
1
15
24
30
48MHz 2 Load
2
4.7
15
20
25MHz 1 Load
1
15
24
30
PCI 1 Load
1
4.7
15
20
PCI 2 Load
2
15
24
30
HTT 1 Load
1
4.7
15
20
HTT 2 Load
2
15
24
30
REF 1 Load
1
4.7
15
20
REF 2 Load
2
10
18
24
IR E F
1143A—07/27/06
4
932S806
Frequency Selection Table
Byte 0
Bit 6 Bit 3 Bit2 Bit1 Bit0
SS_EN FS3 FS2 FS1 FS0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
CPU
(MHz)
Hi-Z
X/4
180.00
220.00
100.00
133.33
166.67
200.00
184.00
188.00
192.00
196.00
204.00
208.00
212.00
216.00
Hi-Z
X/4
180.00
220.00
100.00
133.33
166.67
200.00
184.00
188.00
192.00
196.00
204.00
208.00
212.00
216.00
SRC
(MHz)
Hi-Z
X/8
90.00
110.00
100.00
100.00
100.00
100.00
92.00
94.00
96.00
98.00
102.00
104.00
106.00
108.00
Hi-Z
X/8
90.00
110.00
100.00
100.00
100.00
100.00
92.00
94.00
96.00
98.00
102.00
104.00
106.00
108.00
HTT
(MHz)
Hi-Z
x/12
60.00
73.33
66.67
66.67
66.67
66.67
61.33
62.67
64.00
65.33
68.00
69.33
70.67
72.00
Hi-Z
x/12
60.00
73.33
66.67
66.67
66.67
66.67
61.33
62.67
64.00
65.33
68.00
69.33
70.67
72.00
PCI
(MHz)
Hi-Z
x/24
30.00
36.67
33.33
33.33
33.33
33.33
30.67
31.33
32.00
32.67
34.00
34.67
35.33
36.00
Hi-Z
x/24
30.00
36.67
33.33
33.33
33.33
33.33
30.67
31.33
32.00
32.67
34.00
34.67
35.33
36.00
Spread
%
N/A
N/A
0
0
0
0
0
0
0
0
0
0
0
0
0
0
N/A
N/A
-0.5%
-0.5%
-0.5%
-0.5%
-0.5%
-0.5%
-0.5%
-0.5%
-0.5%
-0.5%
-0.5%
-0.5%
-0.5%
-0.5%
OverClock
Amount
N/A
N/A
0.90
1.10
1.00
1.00
1.00
1.00
0.92
0.94
0.96
0.98
1.02
1.04
1.06
1.08
N/A
N/A
1.00
1.00
1.00
1.00
1.00
1.00
0.92
0.94
0.96
0.98
1.02
1.04
1.06
1.08
1143A—07/27/06
5
