ICST ICS950812YFLFT Frequency generator with 200mhz differential cpu clock Datasheet

ICS950812
Integrated
Circuit
Systems, Inc.
Frequency Generator with 200MHz Differential CPU Clocks
ICS950812
Recommended Application:
Pin Configuration
CK-408 clock with Buffered/Unbuffered mode supporting
VDDREF 1
56 REF
Almador, Brookdale, ODEM, and Montara-G chipsets with
X1 2
55 FS1
PIII/P4 processor. Programmable for group to group skew.
X2 3
54 FS0
Output Features:
GND 4
53 CPU_STOP#*
PCICLK_F0 5
52 CPUCLKT0
•
3 Differential CPU Clock Pairs @ 3.3V
PCICLK_F1 6
51 CPUCLKC0
•
7 PCI (3.3V) @ 33.3MHz including 2 early PCI clocks
PCICLK_F2 7
50 VDDCPU
•
3 PCI_F (3.3V) @ 33.3MHz
VDDPCI 8
49 CPUCLKT1
GND 9
48 CPUCLKC1
•
1 USB (3.3V) @ 48MHz, 1 DOT (3.3V) @ 48MHz
PCICLK0 10
47 GND
•
1 REF (3.3V) @ 14.318MHz
**E_PCICLK1/PCICLK1 11
46 VDDCPU
•
5 3V66 (3.3V) @ 66.6MHz
PCICLK2 12
45 CPUCLKT2
**E_PCICLK3/PCICLK3 13
44 CPUCLKC2
•
1 VCH/3V66 (3.3V) @ 48MHz or 66.6MHz
VDDPCI 14
43 MULTSEL*
•
3 66MHz_OUT/3V66 (3.3V) @ 66.6MHz_IN or 66.6MHz
GND 15
42 IREF
PCICLK4 16
41 GND
Features:
PCICLK5 17
40 FS2
•
Provides standard frequencies and additional 5%
PCICLK6 18
39 48MHz_USB/FS3**
and 10% over-clocked frequencies
VDD3V66 19
38 48MHz_DOT
•
Supports spread spectrum modulation:
GND 20
37 VDD48
No spread, Center Spread (±0.35%, ±0.5%,
66MHZ_OUT0/3V66_2 21
36 GND
or ±0.75%), or Down Spread (-0.5%, -1.0%, or -1.5%)
66MHZ_OUT1/3V66_3 22
35 3V66_1/VCH_CLK/FS4**
66MHZ_OUT2/3V66_4 23
34 PCI_STOP#*
•
Offers adjustable PCI early clock via latch inputs
66MHZ_IN/3V66_5 24
33 3V66_0/FS5**
2
•
Selectable 1X or 2X strength for REF via I C interface
*PD# 25
32 VDD3V66
VDDA 26
31 GND
•
Efficient power management scheme through PD#,
GND 27
30 SCLK
CPU_STOP# and PCI_STOP#.
Vtt_PWRGD# 28
29 SDATA
•
Uses external 14.318MHz crystal
•
Stop clocks and functional control available through
56-Pin 300mil SSOP
I2C interface.
6.10 mm. Body, 0.50 mm. pitch TSSOP
Key Specifications:
*
These inputs have 120K internal pull-up resistors to VDD.
•
CPU Output Jitter <150ps
**
Internal pull-down resistors to ground.
•
3V66 Output Jitter <250ps
Note:
•
66MHz Output Jitter (Additive) (Buffered Mode) <100ps
Almador board level designs MUST use pin 22,
•
CPU Output Skew <100ps
66MHZ_OUT1, as the feedback connection from the
clock buffer path to the Almador (GMCH) chipset.
Block Diagram
48MHz_USB
PLL2
Frequency Select
48MHz_DOT
X1
X2
XTAL
OSC
3V66_5/66MHz_IN
3V66_3/66MHz_OUT1
3V66_(4,2)/66MHz_OUT(2,0)
PLL1
Spread
Spectrum
REF
CPU
DIVDER
Stop
CPUCLKT (2:0)
CPUCLKC (2:0)
3
3
PD#
CPU_STOP#
PCI_STOP#
MULTSEL
FS (5:0)
SDATA
SCLK
VTT_PWRGD#
0542G—08/21/03
PCI
DIVDER
Control
Logic
3V66
DIVDER
Stop
7
2
PCICLK (6:4, 2, 0)
E_PCICLK(1,3)/PCICLK(1,3)
3 PCICLK_F
(2:0)
3V66_0
Config.
Reg.
3V66_1/VCH_CLK
I REF
Bit
FS2 FS1 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
CPUCLK
MHz
66.66
100.00
200.00
133.33
66.66
100.00
200.00
133.33
3V66
MHz
66.66
66.66
66.66
66.66
66.66
66.66
66.66
66.66
66MHz_OU
T (2:0)
3V66 (4:2)
MHz
66.66
66.66
66.66
66.66
66MHz_IN
66MHz_IN
66MHz_IN
66MHz_IN
66MHz_IN
PCICLK_F
3V66_5
MHz
66.66
66.66
66.66
66.66
Input
Input
Input
Input
PCICLK
MHz
33.33
33.33
33.33
33.33
66MHz_IN/2
66MHz_IN/2
66MHz_IN/2
66MHz_IN/2
ICS950812
Pin Configuration
PIN # PIN NAME
PIN TYPE
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
VDDREF
X1
X2
GND
PCICLK_F0
PCICLK_F1
PCICLK_F2
VDDPCI
GND
PCICLK0
**E_PCICLK1/PCICLK1
PCICLK2
**E_PCICLK3/PCICLK3
VDDPCI
GND
PCICLK4
PCICLK5
PCICLK6
VDD3V66
GND
66MHZ_OUT0/3V66_2
66MHZ_OUT1/3V66_3
66MHZ_OUT2/3V66_4
PWR
IN
OUT
PWR
OUT
OUT
OUT
PWR
PWR
OUT
I/O
OUT
I/O
PWR
PWR
OUT
OUT
OUT
PWR
PWR
OUT
OUT
OUT
24
66MHZ_IN/3V66_5
I/O
25
*PD#
IN
26
27
VDDA
GND
PWR
PWR
28
Vtt_PWRGD#
IN
DESCRIPTION
Ref, XTAL power supply, nominal 3.3V
Crystal input, Nominally 14.318MHz.
Crystal output, Nominally 14.318MHz
Ground pin.
Free running PCI clock not affected by PCI_STOP# .
Free running PCI clock not affected by PCI_STOP# .
Free running PCI clock not affected by PCI_STOP# .
Power supply for PCI clocks, nominal 3.3V
Ground pin.
PCI clock output.
Early/Normal PCI clock output latched at power up.
PCI clock output.
Early/Normal PCI clock output latched at power up.
Power supply for PCI clocks, nominal 3.3V
Ground pin.
PCI clock output.
PCI clock output.
PCI clock output.
Power pin for the 3V66 clocks.
Ground pin.
3.3V 66.66MHz clock output selected via buffered or internal VCO.
3.3V 66.66MHz clock output selected via buffered or internal VCO.
3.3V 66.66MHz clock output selected via buffered or internal VCO.
3.3V 66.66MHz clock from internal VCO, 66MHZ input to 66MHz output and
PCI.
Asynchronous active low input pin used to power down the device into a low
power state. The internal clocks are disabled and the VCO and the crystal
are stopped. The latency of the power down will not be greater than 1.8ms.
3.3V power for the PLL core.
Ground pin.
This 3.3V LVTTL input is a level sensitive strobe used to determine when
latch inputs are valid and are ready to be sampled. This is an active low
input.
0542G—08/21/03
2
ICS950812
Pin Configuration (Continued)
PIN # PIN NAME
PIN TYPE
29
30
31
32
33
SDATA
SCLK
GND
VDD3V66
3V66_0/FS5**
I/O
IN
PWR
PWR
I/O
34
PCI_STOP#*
IN
35
3V66_1/VCH_CLK/FS4**
I/O
36
37
38
39
40
41
GND
VDD48
48MHz_DOT
48MHz_USB/FS3**
FS2
GND
PWR
PWR
OUT
I/O
IN
PWR
42
IREF
OUT
43
MULTSEL*
IN
44
CPUCLKC2
OUT
45
CPUCLKT2
OUT
46
47
VDDCPU
GND
PWR
PWR
48
CPUCLKC1
OUT
49
CPUCLKT1
OUT
50
VDDCPU
PWR
51
CPUCLKC0
OUT
52
CPUCLKT0
OUT
53
54
55
56
CPU_STOP#*
FS0
FS1
REF
IN
IN
IN
OUT
DESCRIPTION
Data pin for I2C circuitry 5V tolerant
Clock pin of I2C circuitry 5V tolerant
Ground pin.
Power pin for the 3V66 clocks.
Frequency select latch input pin / 3.3V 66.66MHz clock output.
Stops all PCICLKs besides the PCICLK_F clocks at logic 0 level, when input
low
Frequency select latch input pin / 3.3V 66.66MHz clock output / 48MHz
VCH clock output.
Ground pin.
Power pin for the 48MHz output.3.3V
48MHz clock output.
Frequency select latch input pin / 3.3V 48MHz clock output.
Frequency select pin.
Ground pin.
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.
3.3V LVTTL input for selection the current multiplier for CPU outputs
Complimentary clock of differential pair CPU outputs. These are current
mode outputs. External resistors are required for voltage bias.
True clock of differential pair CPU outputs. These are current mode
outputs. External resistors are required for voltage bias.
Supply for CPU clocks, 3.3V nominal
Ground pin.
Complimentary clock of differential pair CPU outputs. These are current
mode outputs. External resistors are required for voltage bias.
True clock of differential pair CPU outputs. These are current mode
outputs. External resistors are required for voltage bias.
Supply for CPU clocks, 3.3V nominal
Complimentary clock of differential pair CPU outputs. These are current
mode outputs. External resistors are required for voltage bias.
True clock of differential pair CPU outputs. These are current mode
outputs. External resistors are required for voltage bias.
Stops all CPUCLK besides the free running clocks
Frequency select pin.
Frequency select pin.
14.318 MHz reference clock.
0542G—08/21/03
3
ICS950812
Frequency Select Table 1
Freq Sel
FS FS FS
2
1
0
FS(5:3)
From
000
to
101
(See table 2)
110
(See table 2)
111
(See table 2)
CPU MHz
3V66 MHz
66MHz_OU
T (2:0)
66MHz_IN
3V66 (4:2)
3V66 _5
Freq Sel
REF MHz
USB/DOT
MHz
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0
0
0
0
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
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
66.66
100.00
200.00
133.33
66.66
100.00
200.00
133.33
70.00
105.00
Tristate
140.00
70.00
105.00
Tristate
140.00
73.32
110.00
Test/2
146.60
73.32
110.00
Test/2
66.66
66.66
66.66
66.66
66.66
66.66
66.66
66.66
70.00
70.00
Tristate
70.00
70.00
70.00
Tristate
70.00
73.32
73.32
Test/4
73.32
73.32
73.32
Test/4
66.66
66.66
66.66
66.66
66MHz_IN
66MHz_IN
66MHz_IN
66MHz_IN
70.00
70.00
Tristate
70.00
66MHz_IN
66MHz_IN
Tristate
66MHz_IN
73.32
73.32
Test/4
73.32
66MHz_IN
66MHz_IN
Test/4
66.66
66.66
66.66
66.66
Input
Input
Input
Input
70.00
70.00
Tristate
70.00
Input
Input
Tristate
Input
73.32
73.32
Test/4
73.32
Input
Input
Test/4
33.33
33.33
33.33
33.33
66MHz_IN/2
66MHz_IN/2
66MHz_IN/2
66MHz_IN/2
35.00
35.00
Tristate
35.00
66MHz_IN/2
66MHz_IN/2
Tristate
66MHz_IN/2
36.66
36.66
Test/8
36.66
66MHz_IN/2
66MHz_IN/2
Test/8
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
14.318
Tristate
14.318
14.318
14.318
Tristate
14.318
14.318
14.318
Test
14.318
14.318
14.318
Test
48.008
48.008
48.008
48.008
48.008
48.008
48.008
48.008
48.008
48.008
Tristate
48.008
48.008
48.008
Tristate
48.008
48.008
48.008
Test/2
48.008
48.008
48.008
Test/2
1
1
1
146.60
73.32
66MHz_IN
Input
66MHz_IN/2
14.318
48.008
Frequency Select Table 2
FS FS FS
5
4
3
PCI MHz
CPU, 3V66, 66MHz_OUT,
66MHz_IN, PCI
Clocking Mode
0
0
0
Standard Clocking
No Spread (default)
or +/-0.4%
0
0
1
Standard Clocking
0 to -0.5%, Down Spread
0
1
0
Standard Clocking
0 to -1.0%, Down Spread
0
1
1
Standard Clocking
0 to -1.5%, Down Spread
1
0
0
Standard Clocking
+/-0.5%, Center Spread
1
0
1
Standard Clocking
+/-0.75%, Center Spread
1
1
0
5% Overclocking
+/-0.35%, Center Spread
1
1
1
10% Overclocking
+/-0.35%, Center Spread
Note: To enable spread, Byte 0 Bit 7 must be set to 1.
0542G—08/21/03
4
Clocking Mode
Standard Clocking
Standard Clocking
5% Overclocking
Tristate
5% Overclocking
Tristate
5% Overclocking
10% Overclocking
Test
10% Overclocking
Test
10% Overclocking
ICS950812
Maximum Allowed Current
Condition
Max 3.3V supply consumption
Max discrete cap loads,
Vdd = 3.465V
All static inputs = Vdd or GND
Powerdown Mode
(PD# = 0)
40mA
Active Full
280mA
Host Swing Select Functions
MULTSEL
Board Target
Trace/Term Z
Reference R,
Iref = VDD/3*Rr
Output
Current
Voh @ Z
0
50 ohms
Rr = 221 1%,
Iref = 5.00mA
Ioh = 4 * I REF
1.0V @ 50 ohm
1
50 ohms
Rr = 475 1%,
Iref = 2.32mA
Ioh = 6 * I REF
0.7V @ 50 ohm
PCI Select Functions
*
E_PCICLK1 (11)
E_PCICLK3 (13)
E_PCICLK(3,1)
0
0
1
1
0
1
0
1
0ns
0.5ns
1.0ns
1.5ns
Note:
E_PCICLK1 = 10Kohm resistor.
E_PCICLK3 = 10Kohm resistor.
0 = No resistor
1 = 10Kohm pull-up to VDD.
*
Approximate values
0542G—08/21/03
5
ICS950812
BYTE
0
Bit 7
Pin #
-
Affected Pin
Name
Spread Enabled
Bit 6
-
CPUCLKT(2:0)
Bit 5
Bit 4
35
53
3V66_1/VCH_CLK/FS4**
CPU_STOP#*
Bit 3
34
PCI_STOP#*
Bit 2
39
FS3
Bit 1
55
FS1
Bit 0
54
FS0
Note: For PCI_STOP# function, refer to table 3.
BYTE
1
Bit 7
Pin #
43
Affected Pin
Name
MULTSEL*
Control Function
Type
Spread Spectrum Control
Power down mode output level
0= CPU driven in power down
1= undriven
VCH/66.66 Select
Reflects value of pin
Reflects value of pin at power up.
Also can be set.
Frequency Selection
Frequency Selection
Frequency Selection
RW
Bit Control
0
1
OFF
ON
RW
HIGH
LOW
0
RW
R
66.66
Stop
48.00
Active
0
X
RW
Stop
Active
X
RW
R
R
-
-
X
X
X
Control Function
Reflects value of pin
CPU_Stop mode output level
Bit 6
CPUCLKT(2:0)
0= CPU driven when stopped
1 = undriven
CPUCLKT2, CPUCLKC2
Allow control of output with
Bit 5
45, 44
(see note)
assertion of CPU_STOP#.
CPUCLKT1, CPUCLKC1
Allow control of output with
Bit 4
49, 48
(see note)
assertion of CPU_STOP#.
CPUCLKT0, CPUCLKC0
Allow control of output with
Bit 3
52, 51
(see note)
assertion of CPU_STOP#.
Bit 2
45, 44
CPUCLKT2, CPUCLKC2
Output control
Bit 1
49, 48
CPUCLKT1, CPUCLKC1
Output control
Bit 0
52, 51
CPUCLKT0, CPUCLKC0
Output control
Note: CPUCLK(2:0) can be turned on/off by CPU_STOP#. Refer to table 4.
BYTE
2
Pin #
Bit 7
56
Bit 6
18
Bit 5
17
Bit 4
16
Bit 3
13
Bit 2
12
Bit 1
11
Bit 0
10
Note: PCICLK(6:0)
BYTE
3
Bit 7
Bit 6
Affected Pin
Control Function
Name
REF
1X or 2X Strength control
PCICLK6
Output control
PCICLK5
Output control
PCICLK4
Output control
**E_PCICLK3/PCICLK3
Output control
PCICLK2
Output control
**E_PCICLK1/PCICLK1
Output control
PCICLK0
Output control
can be turned on/off by PCI_STOP#. Refer to table 3.
Affected Pin
Pin #
38
39
Control Function
Name
48MHz_DOT
48MHz_USB/FS3**
Output control
Output control
Allow control of output with
Bit 5
7
PCICLK_F2 (see note)
assertion of PCI_STOP#.
Allow control of output with
Bit 4
6
PCICLK_F1 (see note)
assertion of PCI_STOP#.
Allow control of output with
Bit 3
5
PCICLK_F0 (see note)
assertion of PCI_STOP#.
Bit 2
7
PCICLK_F2
Output control
Bit 1
6
PCICLK_F1
Output control
Bit 0
5
PCICLK_F0
Output control
Note: PCICLK_F(2:0) can be turned on/off by PCI_STOP#. Refer to table 5.
0542G—08/21/03
6
Type
R
RW
RW
RW
RW
RW
RW
RW
Type
RW
RW
RW
RW
RW
RW
RW
RW
Type
Bit Control
0
1
HIGH
Not
Freerun
Not
Freerun
Not
Freerun
Disable
Disable
Disable
PWD
0
PWD
x
LOW
0
Freerun
0
Freerun
0
Freerun
0
Enable
Enable
Enable
1
1
1
Bit Control
0
1
1X
2X
Disable Enable
Disable Enable
Disable Enable
Disable Enable
Disable Enable
Disable Enable
Disable Enable
PWD
0
1
1
1
1
1
1
1
Bit Control
RW
RW
0
Disable
Disable
RW
Freerun
RW
Freerun
RW
Freerun
RW
RW
RW
Disable
Disable
Disable
1
Enable
Enable
Not
Freerun
Not
Freerun
Not
Freerun
Enable
Enable
Enable
PWD
1
1
0
0
0
1
1
1
ICS950812
BYTE
4
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Pin #
35
33
33
35
24
23
22
21
BYTE
5
Bit 7
Bit 6
Pin #
X
X
Bit 5
X
Bit 4
X
3V66(1:0) (See table 7)
38
48MHz_DOT Slew Control
39
48MHz_USB Slew Control
Bit 3
Bit 2
Bit 1
Bit 0
Affected Pin
Name
FS4
FS5
3V66_0/FS5**
3V66_1/VCH_CLK/FS4**
66MHZ_IN/3V66_5
66MHZ_OUT2/3V66_4
66MHZ_OUT1/3V66_3
66MHZ_OUT0/3V66_2
Affected Pin
Name
3V66(5:2)/66MHZ_OUT(2:0)
(See table 6)
Control Function
Type
Frequency Selection
Frequency Selection
Output control
Output control
Output control
Output control
Output control
Output control
RW
RW
RW
RW
RW
RW
RW
RW
Control Function
Type
Unused
Reserved
Allow control of output with
assertion of CPU_STOP#.
Allow control of output with
assertion of CPU_STOP#.
00 = Medium (default), 01 = Low,
11,10 =High
00 = Medium (default), 01 = Low,
11,10 =High
X
X
X
RW
RW
RW
RW
Bit Control
0
1
Disable Enable
Disable Enable
Disable Enable
Disable Enable
Disable Enable
Disable Enable
Disable Enable
Disable Enable
Bit Control
0
1
Not
Freerun
Freerun
Not
Freerun
Freerun
-
-
PWD
X
X
1
1
1
1
1
1
PWD
0
0
0
0
0
0
0
0
Note: Functions in Byte 5 of CK408 were intended as a test and debug byte only.
BYTE
6
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Pin #
X
X
X
X
X
X
X
X
Affected Pin
Name
Revision ID Bit 3
Revision ID Bit 2
Revision ID Bit 1
Revision ID Bit 0
Vendor ID Bit 3
Vendor ID Bit 2
Vendor ID Bit 1
Vendor ID Bit 0
BYTE
7
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Pin #
X
X
X
X
X
X
X
X
Affected Pin
Name
-
BYTE
8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Pin #
X
X
X
X
X
X
Affected Pin
Name
-
Bit 1
X
-
Control Function
Type
Bit Control
0
1
-
PWD
X
X
X
X
0
0
0
1
Bit Control
0
1
-
PWD
0
0
0
0
0
0
0
0
PWD
0
0
0
0
1
1
(Reserved)
(Reserved)
(Reserved)
(Reserved)
R
R
R
R
R
R
R
R
Control Function
Type
Unused
Unused
Unused
Unused
Unused
Unused
Unused
Unused
R
R
R
R
R
R
R
R
Control Function
Type
(Reserved)
(Reserved)
(Reserved)
(Reserved)
X
X
X
X
R
R
Bit Control
0
1
-
R
-
Revision ID Value Based on
Device Revision
Readback Byte Count
-
1
Bit 0
X
R
1
Note: Byte 8 is for ICS test only. Do not write as system damage may occur. Bit(3:0) contain the readback Byte count.
0542G—08/21/03
7
ICS950812
BYTE
9
Pin #
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
BYTE
10
Pin #
Affected Pin
Name
35
VCHCLK Slew Control
7, 6, 5
PCICLK_F (2:0) Slew Contol
13, 12,
11, 10
PCICLK (3:0) Slew Contol
18, 17, 16,
13, 12, 11, 10
PCICLK (6:0) Slew Contol
Affected Pin
Name
Control Function
Type
00 = High(default), 01 = Low,
11,10 = Medium
00 (default), 11 = Medium
01 = Low, 10 =High
00 (default), 11 = Medium
10 = Low, 01 =High
00 (default), 11 = Medium
10 = Low, 01 =High
RW
RW
RW
RW
RW
RW
RW
RW
Control Function
Type
M/N Enable (Enable access to
Byte 11 - 14)
Unused
Bit 7
X
-
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
X
24, 23,
22, 21
3V66(5:2)/66MHZ_OUT(2:0)
Skew
33, 35
3V66(1:0) Skew
Approx 250ps per bit (Ref to PCI)
X
X
-
Unused
Unused
Approx 250ps per bit (Ref to PCI)
RW
RW
RW
RW
RW
-
Bit Control
0
1
-
Bit Control
0
1
Byte
HW/B0
(11-14)
-
BYTE
Affected Pin
Bit Control
Control Function
Type
Pin #
Name
0
1
11
Bit 7
X
VCO Divider Bit8
RW
Bit 6
X
REF Divider Bit6
RW
Bit 5
X
REF Divider Bit5
RW
Bit 4
X
REF Divider Bit4
RW
Bit 3
X
REF Divider Bit3
RW
Bit 2
X
REF Divider Bit2
RW
Bit 1
X
REF Divider Bit1
RW
Bit 0
X
REF Divider Bit0
RW
Note: The decimal representation of these 7 bits (Byte 11 bit[6:0]) + 2 is equal to the REF divider value.
Note: See table 8 for Byte 11-14 default information
BYTE
12
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Pin #
X
X
X
X
X
X
X
X
Affected Pin
Name
-
Control Function
VCO
VCO
VCO
VCO
VCO
VCO
VCO
VCO
Divider
Divider
Divider
Divider
Divider
Divider
Divider
Divider
Bit7
Bit6
Bit5
Bit4
Bit3
Bit2
Bit1
Bit0
Type
RW
RW
RW
RW
RW
RW
RW
RW
Bit Control
0
1
-
PWD
0
0
0
0
0
0
0
0
PWD
0
0
0
0
0
0
0
0
PWD
X
X
X
X
X
X
X
X
PWD
X
X
X
X
X
X
X
X
Note: The decimal representation of these 9 bits (Byte 12 bit[7:0]) and Byte 11 bit [7]) + 8 is equal to the VCO divider value.
Note: See table 8 for Byte 11-14 default information
0542G—08/21/03
8
ICS950812
BYTE
13
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Pin #
X
X
X
X
X
X
X
X
Affected Pin
Name
-
Control Function
Type
Spread Spectrum Bit7
Spread Spectrum Bit6
Spread Spectrum Bit5
Spread Spectrum Bit4
Spread Spectrum Bit3
Spread Spectrum Bit2
Spread Spectrum Bit1
Spread Spectrum Bit0
RW
RW
RW
RW
RW
RW
RW
RW
Bit Control
0
1
-
PWD
X
X
X
X
X
X
X
X
Note: Please utilize software utility provided by ICS Application Engineering to configure spread spectrum. Incorrect spread
percentage may cause system failure.
Note: See table 8 for Byte 11-14 default information
BYTE
14
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Pin #
X
X
X
X
X
X
X
X
Affected Pin
Name
-
Control Function
Type
(Reserved)
(Reserved)
Spread Spectrum Bit13
Spread Spectrum Bit12
Spread Spectrum Bit11
Spread Spectrum Bit10
Spread Spectrum Bit9
Spread Spectrum Bit8
RW
RW
RW
RW
RW
RW
RW
RW
Bit Control
0
1
-
PWD
X
X
X
X
X
X
X
X
Note: Please utilize software utility provided by ICS Application Engineering to configure spread spectrum. Incorrect spread
percentage may cause system failure.
Note: See table 8 for Byte 11-14 default information
Spread Spectrum Enable Procedure
Step 1: Power-up ---- Latched inputs, FS(5:0), set frequency per Hardware default on board. SS is off.
BIOS program set IIC Byte0, bit7 to 1, SS will be enable Spread. Note that Byte 10,
bit 7 is default to 0. This allows all setup to be controlled by the Frequency Select
Tables, 1 and 2.
Step 2: After power up, SS% can be changed to the fixed selections shown in Frequency Table 2. This
is achieved by Writing to Byte 4, bit 6/7 (FS5:4) and/or Byte 0 (FS3), The data written
to these bytes will overwrite the existing contents and switch to the desired selection.
Step 3: To set up Linear programming and SS% adjust using Byte 11 through 14, the BIOS must set
Byte 10, bit 7 to a 1. This will enable access to Byte 11 and 12, M/N linear programming
and Byte 13 and 14, Spread Spectrum % adjust.
0542G—08/21/03
9
ICS950812
Table 3
PCI_STOP# I2C Control Table-Byte 0, Bit 3
PCI_STOP#
(Pin 34)
Byte 0 Bit 3
Write Bit
Byte 0, Bit 3 Read Bit
(Internal Status)
0
0
0
0
1
0
1
0
0
1
1`
1
Note: When this Byte 0, Bit 3 is low (0), all PCI clocks are stopped.
Table 4
CPUCLKT/C (2:0) Outputs I2C Control Table
Byte 1
CPU_STOP#
CPUCLKT/C (2:0) Outputs
Bit 3, 4, 5
(Pin 53)
0
0
Stop
0
1
Running
1
0
Running
1
1
Running
Note: Individual CPUCLK outputs are controlled by Byte 1, Bit 3, 4, and 5.
Table 5
PCICLK_F (2:0) Outputs I2C Control Table
PCI_STOP#
Byte 3
PCICLK (2:0) Outputs
Bit 3, 4, 5
(Pin 34)
0
0
Stop
0
1
Running
1
0
Running
1
1
Running
Note: Individual PCICLK outputs are controlled by Byte 3, Bit 3, 4, and 5.
Table 6
3V66 (5:2)/66MHz_OUT(2:0)/66MHz_IN I2C Control Table
CPU_STOP#
(Pin 53)
Byte 5
Bit 5
3V66 (5:2) (Driven)
66MHZ_OUT(2:0)/66MHZ_IN (Buffered)
0
0
Running
0
1
Stopped
1
0
Running
1
1
Running
Note: Activating Byte 5, Bit 5 will allow CPU_STOP# to control stop of pins 21, 22, 23, and 24.
0542G—08/21/03
10
ICS950812
Table 7
3V66 (0:1) I2C Control Table
CPU_STOP#
Byte 5
3V66 (1:0)
(Pin 53)
Bit 4
0
0
Running
0
1
Stopped
1
0
Running
1
1
Running
Note: Activating Byte 5, Bit 4 will allow CPU_STOP# to control stop of pins 33 and 35.
Table 8: Byte 11-14 Defaults
ADDRESS
CPU
FS5 FS4 FS3 FS1 FS0
0
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
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
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
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
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
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
31
1
1
1
1
1
Freq
66.66
99.99
199.98
133.32
66.50
99.75
199.50
133.00
66.34
99.51
199.02
132.68
66.16
99.23
198.47
132.31
66.66
99.99
199.98
133.32
66.66
99.99
199.98
133.32
70.00
105.00
210.00
140.00
73.33
109.99
219.98
146.65
Bytes
Spread
Center
Down
Center
Center
Center
Center
Down
Down
Down
Down
Down
Down
Down
Down
Down
Down
Down
Down
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
Center
0.40%
0.40%
0.40%
0.40%
-0.48%
-0.48%
-0.48%
-0.48%
-0.98%
-0.98%
-0.98%
-0.98%
-1.52%
-1.52%
-1.52%
-1.52%
0.51%
0.51%
0.51%
0.51%
0.74%
0.74%
0.74%
0.74%
0.35%
0.35%
0.35%
0.35%
0.34%
0.34%
0.34%
0.34%
I2C read back values in Hex.
I2C read back values in binary.
11
12
13
14
11
12
13
14
8D
8D
8D
8D
8D
8D
8D
8D
8D
8D
8D
8D
90
90
90
90
8D
8D
8D
8D
8D
8D
8D
8D
8D
8D
8D
8D
89
89
89
89
9B
9B
9B
9B
9A
9A
9A
9A
99
99
99
99
EB
EB
EB
EB
9B
9B
9B
9B
9B
9B
9B
9B
B0
B0
B0
B0
4A
4A
4A
4A
02
02
02
02
EF
EF
EF
EF
E7
E7
E7
E7
DD
DD
DD
DD
05
05
05
05
0B
0B
0B
0B
35
35
35
35
68
68
68
68
18
18
18
18
17
17
17
17
17
17
17
17
17
17
17
17
18
18
18
18
18
18
18
18
19
19
19
19
1A
1A
1A
1A
10001101
10001101
10001101
10001101
10001101
10001101
10001101
10001101
10001101
10001101
10001101
10001101
10010000
10010000
10010000
10010000
10001101
10001101
10001101
10001101
10001101
10001101
10001101
10001101
10001101
10001101
10001101
10001101
10001001
10001001
10001001
10001001
10011011
10011011
10011011
10011011
10011010
10011010
10011010
10011010
10011001
10011001
10011001
10011001
11101011
11101011
11101011
11101011
10011011
10011011
10011011
10011011
10011011
10011011
10011011
10011011
10110000
10110000
10110000
10110000
01001010
01001010
01001010
01001010
00000010
00000010
00000010
00000010
11101111
11101111
11101111
11101111
11100111
11100111
11100111
11100111
11011101
11011101
11011101
11011101
00000101
00000101
00000101
00000101
00001011
00001011
00001011
00001011
00110101
00110101
00110101
00110101
01101000
01101000
01101000
01101000
00011000
00011000
00011000
00011000
00010111
00010111
00010111
00010111
00010111
00010111
00010111
00010111
00010111
00010111
00010111
00010111
00011000
00011000
00011000
00011000
00011000
00011000
00011000
00011000
00011001
00011001
00011001
00011001
00011010
00011010
00011010
00011010
0542G—08/21/03
11
ICS950812
Absolute Maximum Ratings
Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V
Logic Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . GND –0.5 V to VDD +0.5 V
Ambient Operating Temperature . . . . . . . . . . 0°C to +90°C
Case Temperature . . . . . . . . . . . . . . . . . . . . . . 115°C
Storage Temperature . . . . . . . . . . . . . . . . . . . . –65°C to +150°C
Stresses above those listed under Absolute Maximum Ratings may cause permanent damage to the device. These ratings
are stress specifications only and functional operation of the device at these or any other conditions above those listed
in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for
extended periods may affect product reliability.
Electrical Characteristics - Input/Supply/Common Output Parameters
TA = 0 - 90°C; Supply Voltage VDD = 3.3 V +/-5%
PARAMETER
SYMBOL
Input High Voltage
V IH
2
Input Low Voltage
VIL
VSS0.3
IIH
Input High Current
IIH
IIL1
Input Low Current
IIL2
CONDITIONS
VIN = VDD; Inputs with no pull-down
resistors
VIN = VDD; Inputs with pull-down
resistors
VIN = 0 V; Inputs with no pull-up
resistors
VIN = 0 V; Inputs with pull-up
resistors
MIN
TYP
MAX
VDD+0.
3
UNITS
0.8
V
5.75
mA
200
µA
V
-5.75
mA
-200
µA
IDD3.3OP
CL = Full load; Select @ 100 MHz
233
280
mA
IDD3.3OP
CL =Full load; Select @ 133 MHz
234
280
mA
IDD3.3PD
IDD3.3PDHIz
Fi
Lpin
CIN
COUT
CINX
IREF=5 mA
20
0.289
14.32
52
0.5
30
7
5
6
45
mA
mA
MHz
nH
pF
pF
pF
1
2.1
ms
12
12
ns
ns
Operating Supply Current
Powerdown Current
Input Frequency
Pin Inductance
Input Capacitance1
Clk Stabilization1,2
TSTAB
Delay 1
tPZH,tPZL
tPHZ,tPLZ
V DD = 3.3 V
Logic Inputs
Output pin capacitance
X1 & X2 pins
From PowerUp or deassertion of
PowerDown to 1st clock.
Output enable delay (all outputs)
Output disable delay (all outputs)
1
Guaranteed by design, not 100% tested in production.
See timing diagrams for buffered and un-buffered timing requirements.
2
0542G—08/21/03
12
27
1
1
ICS950812
Electrical Characteristics - CPU (1V Select) 100MHz
TA = 0 - 90°C; VDD=3.3V +/-5%; CL = 10-20 pF (unless otherwise specified)
PARAMETER
Current Source Output
Impedance
Average Period
Output High Voltage
Output Low Voltage
Rise Time
Fall Time
Duty Cycle
Skew
Jitter, Cycle to cycle
SYMBOL
CONDITIONS
MIN
Zo1
V O = Vx
2500
TPERIOD
V OH3
V OL3
tr3
tf3
dt3
tsk3
Fig. 5
10.00
0.92
-0.2
175
175
45
tjcyc-cyc 1
Measured from Single Ended Waveform
VOL = 0.41V, VOH = 0.86V (Fig. 6)
VOH = 0.86V VOL = 0.41V (Fig.6)
Fig. 5
VT = 50%
VT = 50%
TYP
MAX
UNITS
Ω
10.01
390
305
51
10
40
10.20
1.45
0.35
540
540
55
100
175
ns
V
ps
ps
%
ps
ps
1
Guaranteed by design, not 100% tested in production.
IOWT can be varied and is selectable thru the MULTSEL pin.
2
Electrical Characteristics - CPU (0.7V Select) 100MHz
TA = 0 - 90°C; VDD=3.3V +/-5%; (unless otherwise specified)
PARAMETER
Current Source Output
Impedance
Average Period
Voltage High
Voltage Low
Max Voltage
Min Voltage
Crossing Voltage (abs)
Crossing Voltage (var)
Rise Time
Fall Time
Rise Time Variation
Fall Time Variation
Duty Cycle
Skew
Jitter, Cycle to cycle
SYMBOL
CONDITIONS
MIN
Zo1
VO = V x
3000
TPERIOD
VHigh
VLow
Vovs
Vuds
Vcross(abs)
d-Vcross
tr
tf
d-t r
d-t f
dt3
t sk3
Fig. 1
Statistical measurement on single ended signal
using oscilloscope math function.
Measurement on single ended signal using
absolute value.
Fig. 3
Variation of crossing over all edges (Fig. 4)
VOL = 0.175V, VOH = 0.525V (Fig. 3)
VOH = 0.525V VOL = 0.175V (Fig. 3)
10.00
660
-150
Measurement from differential wavefrom (Fig 1)
VT = 50%
45
t jcyc-cyc 1
VT = 50% (Fig. 1)
1
Guaranteed by design, not 100% tested in production.
IOWT can be varied and is selectable thru the MULTSEL pin.
2
0542G—08/21/03
13
-450
250
175
175
TYP
MAX
UNITS
Ω
10.01
720
15
750
-2
319
12
310
300
10
10
51
16
10.20
850
150
1150
ns
mV
550
140
810
810
125
125
55
100
mV
mV
ps
ps
ps
ps
%
ps
48
175
ps
mV
ICS950812
Electrical Characteristics - CPU (0.7V Select) 133.33MHz
TA = 0 - 90°C; VDD=3.3V +/-5%; (unless otherwise specified)
PARAMETER
Current Source Output
Impedance
Average Period
Voltage High
Voltage Low
Max Voltage
Min Voltage
Crossing Voltage (abs)
Crossing Voltage (var)
Rise Time
SYMBOL
CONDITIONS
MIN
Zo1
VO = Vx
3000
TPERIOD
VHigh
VLow
Vovs
Vuds
Vcross(abs)
d-Vcross
Fig. 1
Statistical measurement on single ended signal
using oscilloscope math function.
Measurement on single ended signal using
absolute value.
Fig. 3
Variation of crossing over all edges (Fig. 4)
7.50
660
-150
tr
VOL = 0.175V, VOH = 0.525V (Fig. 3)
VOH = 0.525V VOL = 0.175V (Fig. 3)
Fall Time
tf
Rise Time Variation
Fall Time Variation
d-tr
d-tf
Duty Cycle
dt3
Skew
tsk3
Jitter, Cycle to cycle
tjcyc-cyc
MAX
UNITS
Ω
7.51
718
17
730
7
340
15
7.65
850
150
1150
550
140
mV
mV
175
310
810
ps
175
315
810
ps
5
5
125
125
ps
ps
51
55
%
VT = 50%
14
100
ps
VT = 50% (Fig. 1)
75
175
ps
TYP
33
MAX
65
UNITS
Ω
Measurement from differential wavefrom (Fig 1)
1
TYP
-450
250
45
ns
mV
mV
1
Guaranteed by design, not 100% tested in production.
2
I OWT can be varied and is selectable thru the MULTSEL pin.
Electrical Characteristics - PCICLK Buffered Mode
TA = 0 - 90°C; VDD = 3.3V +/-5%; CL = 10-30 pF (unless otherwise specified)
PARAMETER
Output Impedance
Output High Voltage
Output Low Voltage
Output High Current
Output Low Current
Rise Time
Fall Time
Duty Cycle
Skew
Jitter,cycle to cyc
SYMBOL
RDSP11
V OH1
V OL1
IOH1
IOL1
tr11
tf11
dt11
tsk11
tjcyc-cyc 1
CONDITIONS
V O = V DD*(0.5)
MIN
12
IOH = -1 mA
2.05
V
IOL = 1 mA
0.65
V
VOH@MIN = 1.0V, V OH@MAX = 3.135V
-33
-28
mA
V OL @MIN = 1.95V, VOL @MAX = 0.4V
26
38
mA
VOL = 0.4 V, VOH = 2.4 V (Fig. 7)
0.5
1.4
2.3
ns
VOH = 2.4 V, VOL = 0.4 V (Fig. 7)
0.5
1.2
2.3
ns
V T = 1.5 V
45
52
55
%
V T = 1.5 V
35
500
ps
V T = 1.5 V (Additive) (Fig. 8)
60
120
ps
1
Guaranteed by design, not 100% tested in production.
0542G—08/21/03
14
ICS950812
Electrical Characteristics - PCICLK Un-Buffered Mode
TA = 0 - 90°C; VDD=3.3V +/-5%; CL = 10-30 pF (unless otherwise specified)
PARAMETER
Output Impedance
Average Period
Output High Voltage
Output Low Voltage
Output High Current
Output Low Current
Rise Time
Fall Time
Duty Cycle
Skew
Jitter,cycle to cyc
SYMBOL
RDSP11
TPERIOD
VOH1
VOL1
IOH1
IOL1
tr11
tf11
dt11
tsk11
tjcyc-cyc
CONDITIONS
VO = VDD*(0.5)
MIN
12
TYP
33
Fig. 8
IOH = -1 mA
30.00
2.05
30.01
IOL = 1 mA
MAX
65
UNITS
Ω
ns
V
0.65
V
VOH@MIN = 1.0V, VOH@MAX = 3.135V
-33
-28
mA
V OL @MIN = 1.95 V, VOL @MAX = 0.4 V
26
38
mA
VOL = 0.4 V, VOH = 2.4 V (Fig. 7)
0.5
1.4
2.3
ns
VOH = 2.4 V, VOL = 0.4 V (Fig. 7)
0.5
1.2
2.3
ns
V T = 1.5 V (Fig. 8)
45
50
55
%
VT = 1.5 V
65
500
ps
V T = 1.5 V (Fig. 8)
101
290
ps
1
1
Guaranteed by design, not 100% tested in production.
Electrical Characteristics- 3V66 - Buffered Mode: 3V66 [1:0] 66MHz_OUT [2:0]
TA = 0 - 90°C; VDD=3.3V +/-5%; CL = 10-30 pF (unless otherwise specified)
PARAMETER
Output Impedance
SYMBOL
RDSP11
CONDITIONS
V O = V DD*(0.5)
MIN
12
Output High Voltage
VOH1
IOH = -1 mA
2.05
Output Low Voltage
Skew
VOL1
IOH1
IOL1
tr11
tf11
dt11
tsk11
Jitter
tjcyc-cyc 1
Skew
Jitter
Output High Current
Output Low Current
Rise Time
Fall Time
Duty Cycle
TYP
33
MAX
65
UNITS
Ω
V
IOL = 1 mA
0.65
V
-33
-28
mA
VOL @MIN = 1.95 V, V OL @MAX = 0.4 V
26
38
mA
VOL = 0.4 V, VOH = 2.4 V (Fig. 7)
0.5
1.6
2.3
ns
VOH = 2.4 V, V OL = 0.4 V (Fig. 7)
0.5
1
2.3
ns
VT = 1.5 V (Fig. 8)
45
52
55
%
10
250
ps
V T = 1.5 V 3V66 [1:0] (Additive) (Fig. 8)
83
120
ps
tsk11
VT = 1.5 V 66MHz_OUT [2:0]
169
250
ps
tjcyc-cyc 1
VT = 1.5V 66MHz_OUT [2:0]
(Fig. 8)
83
290
ps
V
OH@MIN = 1.0 V, V
VT = 1.5 V
1
Guaranteed by design, not 100% tested in production.
0542G—08/21/03
15
OH@MAX
= 3.135 V
3V66 [1:0]
ICS950812
Electrical Characteristics - 3V66 -Un-Buffered Mode: 3V66 [5:0]
TA = 0 - 90°C; VDD=3.3V +/-5%; CL = 10-30 pF (unless otherwise specified)
PARAMETER
Output Impedance
SYMBOL
Average Period
Output High Voltage
TPERIOD
Output Low Voltage
Output High Current
Output Low Current
Rise Time
Fall Time
Duty Cycle
Skew
Jitter
CONDITIONS
VO = VDD*(0.5)
MIN
12
TYP
33
MAX
65
UNITS
Ω
Fig. 8
IOH = -1 mA
15.00
2.05
15.01
15.30
ns
V
0.65
V
-33
-28
mA
V OL @MIN = 1.95 V, VOL @MAX = 0.4 V
26
38
mA
VOL = 0.4 V, VOH = 2.4 V (Fig. 7)
0.5
1.6
2.3
ns
VOH = 2.4 V, VOL = 0.4 V (Fig. 7)
0.5
1.2
2.3
ns
V T = 1.5 V (Fig. 8)
45
48
55
%
VT = 1.5 V
40
250
ps
VT = 1.5 V (Fig. 8)
133
290
ps
RDSP11
V OH1
VOL1
IOH1
IOL1
tr11
tf11
dt11
tsk11
tjcyc-cyc
IOL = 1 mA
V
OH@MIN
1
= 1.0 V, V
OH@MAX
= 3.135 V
1
Guaranteed by design, not 100% tested in production.
Electrical Characteristics - VCH, 48MHz DOT, 48MHz, USB
TA = 0 - 90°C; VDD=3.3V +/-5%; CL = 10-20 pF (unless otherwise specified)
PARAMETER
SYMBOL
CONDITIONS
Fig. 8
Output Frequency
FO1
1
VO = VDD*(0.5)
Output Impedance
RDSP1
1
IOH = -1 mA
Output High Voltage
VOH
1
Output Low Voltage
V OL
Output High Current
IOH1
Output Low Current
IOL1
48DOT Rise Time
tr11
tf11
tr11
tf11
dt11
dt11
48DOT Fall Time
VCH 48 USB Rise Time
VCH 48 USB Fall Time
48 DOT Duty Cycle
VCH 48 USB Duty Cycle
48 DOT Jitter
tjcyc-cyc
USB to DOT Skew
tsk11
VCH Jitter
tjcyc-cyc
MIN
20
TYP
48
48
1
70
2.05
UNITS
MHz
Ω
V
IOL = 1 mA
0.5
V
-29
-20
mA
VOL @MIN = 1.95 V, VOL @MAX = 0.4 V
25
27
mA
VOL = 0.4 V, VOH = 2.4 V (Fig. 7)
0.5
0.7
1.15
ns
VOH = 2.4 V, VOL = 0.4 V (Fig. 7)
0.5
0.8
1.15
ns
VOL = 0.4 V, VOH = 2.4 V (Fig. 7)
1
1.2
2.3
ns
VOH = 2.4 V, VOL = 0.4 V (Fig. 7)
1
1.4
2.3
ns
VT = 1.5 V (Fig. 8)
45
53
55
%
VT = 1.5 V (Fig. 8)
45
V
1
MAX
OH@MIN = 1.0 V, V
OH@MAX
= 3.135 V
53
55
%
VT = 1.5 V (Fig. 8)
183
410
ps
VT = 1.5 V (0 OR 180 degrees)
0.43
1
ns
VT = 1.5 V (Fig. 8)
157
410
ps
1
Guaranteed by design, not 100% tested in production.
0542G—08/21/03
16
ICS950812
Electrical Characteristics - REF (1X select)
TA = 0 - 90°C; VDD=3.3V +/-5%; CL = 10-20 pF (unless otherwise specified)
PARAMETER
Output Frequency
Output Impedance
SYMBOL
FO1
Output High Voltage
Output Low Voltage
V OH1
VOL1
Output High Current
IOH1
Output Low Current
IOL1
RDSP11
tr1
1
Fall Time
tf1
1
Duty Cycle
dt11
Rise Time
Jitter
tjcyc-cyc
CONDITIONS
Fig. 8
VO = VDD*(0.5)
MIN
IOH = -1 mA
2.05
20
TYP
14.32
48
OH@MIN
= 1.0 V, V
OH@MAX
= 3.135 V
70
UNITS
MHz
Ω
V
IOL = 1 mA
V
MAX
0.45
V
-29
-25
mA
27
mA
VOL @MIN = 1.95 V, VOL @MAX = 0.4 V
25
VOL = 0.4 V, VOH = 2.4 V (Fig. 7)
1
1.1
2.3
ns
VOH = 2.4 V, VOL = 0.4 V (Fig. 7)
1
1.4
2.3
ns
VT = 1.5 V
45
53
55
%
180
1200
ps
TYP
14.32
MAX
UNITS
MHz
Ω
1
VT = 1.5 V (Fig. 8)
1
Guaranteed by design, not 100% tested in production.
Electrical Characteristics - REF (2X select)
TA = 0 - 90°C; VDD=3.3V +/-5%; CL = 20-40 pF (unless otherwise specified)
PARAMETER
Output Frequency
Output Impedance
SYMBOL
FO1
RDSP11
CONDITIONS
Fig. 8
VO = VDD*(0.5)
Output High Voltage
VOH1
IOH = -1 mA
V
Output Low Voltage
VOL1
IOL = 1 mA
V
Output High Current
IOH1
IOL1
tr11
tf11
dt11
Output Low Current
Rise Time
Fall Time
Duty Cycle
Jitter
tjcyc-cyc
V
OH@MIN
= 1.0 V, V
OH@MAX
MIN
= 3.135 V
mA
VOL @MIN = 1.95 V, VOL @MAX = 0.4 V
1
mA
VOL = 0.4 V, VOH = 2.4 V (Fig. 7)
1
1.1
2.3
ns
VOH = 2.4 V, VOL = 0.4 V (Fig. 7)
1
0.9
2.3
ns
VT = 1.5 V
45
53
55
%
180
1200
ps
VT = 1.5 V (Fig. 8)
1
Guaranteed by design, not 100% tested in production.
0542G—08/21/03
17
ICS950812
Figure 1 - Differential (CPUCLK - CPUCLK#) Measurement Points (Tperiod, Duty Cycle, Jitter)
TPERIOD
High Duty Cycle %
Low Duty Cycle %
0.000 V
Figure 2 - 0.7V Differential TRise and TFall Measurement Points
CPUCLK#
+0.35V
0.0V
-0.35V
CPUCLK
TRISE
TFALL
0542G—08/21/03
18
ICS950812
Figure 3 - 0.7V Single Ended Measurement Points for TRise, TFall
TRISE (CPUCLK)
V
OH
= 0.525
CP
K
UC
LK
#
CL
U
CP
VCROSS
V
OL
= 0.175V
TFALL (CPUCLK#)
Figure 4 - 0.7V VCross Range Measurement Clarification
VCROSS(REL) max
Total VCROSS Variation
(140mV max)
VCROSS(REL) min
0542G—08/21/03
19
ICS950812
Figure 5 - 1.0V Single Ended VCross, VOH and VOL Measurement Points
VOH Max 1.45V
CPUCLK#
VOH Min 0.92V
VCROSS Max 0.76V
VCROSS Min 0.51V
VOL Max 0.35V
CPUCLK
VOL Min -0.20V
Figure 6 - 1.0V Single Ended Measurement Points for TRise, TFall
TRISE (CPUCLK)
V
OH
= 0.86V
CP
K
UC
LK
#
CL
U
CP
VCROSS
V
OL
= 0.41V
TFALL (CPUCLK#)
0542G—08/21/03
20
ICS950812
Figure 7 - Measurement Points for TRise, TFall with Lumped Load
2.4V
1.5V
0.4V
Figure 8 - Measurement Points for TPeriod, Duty Cycle and Jitter
TPERIOD
High Duty Cycle %
Low Duty Cycle %
1.5V
0542G—08/21/03
21
ICS950812
General I2C serial interface information
How to Write:
How to Read:
Controller (host) sends a start bit.
Controller (host) sends the write address D2 (H)
ICS clock will acknowledge
Controller (host) sends the begining byte location = N
ICS clock will acknowledge
Controller (host) sends the data byte count = X
ICS clock will acknowledge
Controller (host) starts sending Byte N through
Byte N + X -1
(see Note 2)
• ICS clock will acknowledge each byte one at a time
• Controller (host) sends a Stop bit
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Controller (host) will send start bit.
Controller (host) sends the write address D2 (H)
ICS clock will acknowledge
Controller (host) sends the begining byte
location = N
ICS clock will acknowledge
Controller (host) will send a separate start bit.
Controller (host) sends the read address D3 (H)
ICS clock will acknowledge
ICS clock will send the data byte count = X
ICS clock sends Byte N + X -1
ICS clock sends Byte 0 through byte X (if X(H)
was written to byte 8).
Controller (host) will need to acknowledge each
byte
Controllor (host) will send a not acknowledge bit
Controller (host) will send a stop bit
Index Block Read Operation
Index Block Write Operation
Controller (Host)
starT bit
Slave Address D2(H)
WR
WRite
Controller (Host)
T
starT bit
Slave Address D2(H)
WR
WRite
ICS (Slave/Receiver)
T
ICS (Slave/Receiver)
ACK
ACK
Beginning Byte = N
Beginning Byte = N
ACK
ACK
RT
Repeat starT
Slave Address D3(H)
RD
ReaD
Data Byte Count = X
ACK
Beginning Byte N
ACK
X Byte
ACK
Data Byte Count = X
ACK
Beginning Byte N
Byte N + X - 1
ACK
X Byte
ACK
P
stoP bit
Byte N + X - 1
N
P
0542G—08/21/03
22
Not acknowledge
stoP bit
ICS950812
Buffered Mode - 3V66[0:1], 66MHz_IN, 66MHz_OUT[0:2] and PCI Phase Relationship
All 3V66 clocks are to be in phase with each other. All 66MHz_OUT clocks are to be in phase with each other. There is
NO phase relationship between the 3V66 clocks and the 66MHz_OUT and PCI clocks. In the case where 3V66_1 is
configured as 48MHz VCH clock, there is no defined phase relationship between 3V66_1_VCH and other 3V66 clocks.
The PCI group should lag 3V66 by the standard skew described below as Tpci.
The 66MHz_IN to 66MHz_OUT delay is shown in the figure below and is specified to be within a min and max propagation
value.
66MHz_IN
Tpd
66MHz_OUT
3V66
No Relationship
Tpci
PCICLK_F (2:0) PCICLK (6:0)
E_PCICLK (3,1)
Tepci
Group to Group Skews at Common Transition Edges: Buffered Mode
GROUP
SYMBOL
66MHz_IN 66MHz_OUT1,2
Tpd
66MHz_OUT to PCI 1,2
Tpci
CONDITIONS
Propogation delay from
66MHz_IN to 66MHz_OUT (2:0)
66MHz_OUT (2:0) leads 33 MHz
PCICLK
MIN
TYP
MAX
UNITS
2.5
2.9
4.5
ns
3.5
ns
1.5
1
Guaranteed by design, not 100% tested in production.
500ps Tolerance
2
E_PCICLK to PCICLK Skews
GROUP
SYMBOL
TE_PCI-PCI1
E_PCICLK to PCICLK 1
TE_PCI-PCI2
TE_PCI-PCI3
CONDITIONS
E_PCICLK1 (pin 11)=0
E_PCICLK3 (pin 13)=1
E_PCICLK1 (pin 11)=1
E_PCICLK3 (pin 13)=0
E_PCICLK1 (pin 11)=1
E_PCICLK3 (pin 13)=1
1
Guaranteed by design, not 100% tested in production.
0542G—08/21/03
23
MIN
TYP
MAX
UNITS
0.3
0.5
0.7
ns
0.8
1.0
1.2
ns
1.3
1.5
1.7
ns
ICS950812
Un-Buffered Mode 3V66 & PCI Phase Relationship
All 3V66 clocks are to be in pphase with each other. In the case where 3V66_1 is configured as 48MHz VCH clock, there
is no defined phase relationship between 3V66_1_VCH and other 3V66 clocks. The PCI group should lag 3V66 by the
standard skew described below as Tpci.
3V66 (1:0)
3V66 (4:2)
3V66_5
Tpci
PCICLK_F (2:0) PCICLK (6:0)
E_PCICLK (3,1)
Tepci
Group to Group Skews at Common Transition Edges: Unbuffered Mode
GROUP
3V66 to PCI1,2
SYMBOL
S3V66-PCI
CONDITIONS
3V66 (5:0) leads 33MHz PCI
MIN
1.5
TYP
2.55
MAX
3.5
UNITS
ns
MIN
TYP
MAX
UNITS
0.3
0.5
0.7
ns
0.8
1.0
1.2
ns
1.3
1.5
1.7
ns
1
Guarenteed by design, not 100% tested in production.
500ps Tolerance
2
E_PCICLK to PCICLK Skews
GROUP
SYMBOL
TE_PCI-PCI1
E_PCICLK to PCICLK 1
TE_PCI-PCI2
TE_PCI-PCI3
CONDITIONS
E_PCICLK1 (pin 11)=0
E_PCICLK3 (pin 13)=1
E_PCICLK1 (pin 11)=1
E_PCICLK3 (pin 13)=0
E_PCICLK1 (pin 11)=1
E_PCICLK3 (pin 13)=1
1
Guaranteed by design, not 100% tested in production.
0542G—08/21/03
24
ICS950812
PCI_STOP# - Assertion (transition from logic "1" to logic "0")
The impact of asserting the PCI_STOP# signal will be the following. All PCI[6:0] and stoppable PCI_F[2,0] clocks will latch
low in their next high to low transition. The PCI_STOP# setup time tsu is 10 ns, for transitions to be recognized by the next
rising edge.
Assertion of PCI_STOP# Waveforms
PCI_STOP#
PCI_F[2:0] 33MHz
PCI[6:0] 33MHz
tsu
CPU_STOP# - Assertion (transition from logic "1" to logic "0")
The impact of asserting the CPU_STOP# pin is all CPU outputs that are set in the I2C configuration to be stoppable via
assertion of CPU_STOP# are to be stopped after their next transition. When the I2C Bit 6 of Byte 1 is programmed to '0'
the final state of the stopped CPU signals is CPU = High and CPU# = Low. There is to be no change to the output drive
current values. The CPU will be driven high with a current value equal to (Mult 0 'select') x (Iref), the CPU# signal will not
be driven . When the I2C Bit 6 of Byte 1 is programmed to '1' then final state of the stopped CPU signals is Low, both CPU
and CPU# outputs will not be driven.
Assertion of CPU_STOP# Waveforms
CPU_STOP#
CPUCLKT
CPUCLKC
CPU_STOP# Functionality
CPU_STOP#
CPUT
CPUC
1
Normal
Normal
0
iref * Mult
Float
0542G—08/21/03
25
ICS950812
CPU_STOP# - De-assertion (transition from logic "0" to logic "1")
All CPU outputs that were stopped are to resume normal operation in a glitch free manner. The maximum latency from the
de-assertion to active outputs is to be defined to be between 2 - 6 CPU clock periods (2 clocks are shown). If the I2C
Bit 6 of Byte 1 is programmed to "1" then the stopped CPU outputs will be driven High within 10 nS of CPU_Stop# deassertion.
De-assertion of CPU_STOP# Waveforms
CPU_STOP#
CPUCLKT(2:0)
Tdrive_CPU_STOP# <10ns @ 200mV
*CPUCLKT(2:0)TS
CPUCLKC(2:0)
*Signal TS is CPUCLKT in Tri-State mode
PD# - Assertion (transition from logic "1" to logic "0")
When PWRDWN# is sampled low by two consecutive rising edges of CPU clock, then all clock outputs except CPU clocks
must be held low on their next high to low transitions. When the I2C Bit 6 of Byte 0 is programmed to '0' CPU clocks must
be held with the CPU clock pin driven high with a value of 2 x Iref, and CPU# undriven. If Bit 6 of Byte 0 is '1' then both
CPU and CPU# are undriven. Note the example below shows CPU = 133 MHz and Bit 6 of Byte 0 = '0', this diagram and
description is applicable for all valid CPU frequencies 66, 100, 133, 200 MHz.
Due to the state if the internal logic, stopping and holding the REF clock outputs in the LOW state may require more than
one clock cycle to complete.
Power Down Assertion of Waveforms
25ns
0ns
50ns
PD#
CPUCLKT 100MHz
CPUCLKC 100MHz
3V66MHz
66MHz_IN
66MHz_OUT
PCICLK 33MHz
USB 48MHz
REF 14.318MHz
PD# Functionality
PD#
CPUCLKT
CPUCLKC
3V66
66MHz_OUT
PCICLK_F
PCICLK
PCICLK
USB/DOT
48MHz
1
Normal
Normal
66MHz
66MHz_IN
66MHz_IN/2
66MHz_IN/2
48MHz
0
iref * Mult
Float
Low
Low
Low
Low
Low
0542G—08/21/03
26
ICS950812
Power Down De-Assertion Mode
The power-up latency needs to be less than 1.8mS. this is the time from the de-asseration of the powerdown of the ramping
of the power supply until the time that stable clocks are output from the clock chip. If the I2C Bit 6 of Byte 0 is programmed
to "1" then the stopped CPU outputs will be driven high within 3 nS of PD# de-asseration.
Test Configuration Diagrams
Rs=33 Ohms
1%
TLA
Rdif=475 Ohms
1%
CLK408
CPUCLKT test
point
Rs=33 Ohms
1%
TLB
Rp=63.4 Ohms
1%
CPUCLKC test
point
Rp=63.4 Ohms
1%
2pF
5%
RREF=221 Ohms
1%
2pF
5%
MULTSEL Pin must be Low
CPU 1.0V Configuration test load board termination
Rs=33 Ohms
5%
TLA
CLK408
CPUCLKT test
point
Rs=33 Ohms
5%
TLB
Rp=49.9 Ohms
1%
CPUCLKC test
point
Rp=49.9 Ohms
1%
Rset=475 Ohms
1%
2pF
5%
2pF
5%
MULTSEL Pin must be High
CPU 0.7V Configuration test load board termination
0542G—08/21/03
27
ICS950812
c
N
L
E1
INDEX
AREA
E
1 2
h x 45°
D
A
A1
-Ce
SEATING
PLANE
b
In Millimeters
SYMBOL COMMON DIMENSIONS
MIN
MAX
A
2.41
2.80
A1
0.20
0.40
b
0.20
0.34
c
0.13
0.25
SEE VARIATIONS
D
E
10.03
10.68
E1
7.40
7.60
0.635 BASIC
e
h
0.38
0.64
L
0.50
1.02
SEE VARIATIONS
N
α
0°
8°
In Inches
COMMON DIMENSIONS
MIN
MAX
.095
.110
.008
.016
.008
.0135
.005
.010
SEE VARIATIONS
.395
.420
.291
.299
0.025 BASIC
.015
.025
.020
.040
SEE VARIATIONS
0°
8°
VARIATIONS
N
.10 (.004) C
56
D mm.
MIN
18.31
D (inch)
MAX
18.55
MIN
.720
Reference Doc.: JEDEC Publicat ion 95, M O-118
300 mil SSOP Package
10-0034
Ordering Information
ICS950812yFLFT
Example:
ICS XXXX y F LF T
Designation for tape and reel packaging
Lead Free (optional)
Package Type
F = SSOP
Revision Designator (will not correlate with datasheet revision)
Device Type (consists of 3 or 4 digit numbers)
Prefix
ICS, AV = Standard Device
0542G—08/21/03
28
MAX
.730
ICS950812
c
N
In Millimeters
In Inches
SYMBOL COMMON DIMENSIONS COMMON DIMENSIONS
MIN
MAX
MIN
MAX
A
-1.20
-.047
A1
0.05
0.15
.002
.006
A2
0.80
1.05
.032
.041
b
0.17
0.27
.007
.011
c
0.09
0.20
.0035
.008
SEE VARIATIONS
SEE VARIATIONS
D
8.10 BASIC
0.319 BASIC
E
E1
6.00
6.20
.236
.244
0.50 BASIC
0.020 BASIC
e
L
0.45
0.75
.018
.030
SEE VARIATIONS
SEE VARIATIONS
N
0°
8°
0°
8°
α
aaa
-0.10
-.004
L
E1
INDEX
AREA
E
1 2
D
A
A2
A1
-Ce
VARIATIONS
SEATING
PLANE
b
N
aaa C
56
D mm.
MIN
MAX
13.90
14.10
D (inch)
MIN
.547
Reference Doc.: JEDEC Publicat ion 95, M O-153
6.10 mm. Body, 0.50 mm. pitch TSSOP
(20 mil)
(240 mil)
10-0039
Ordering Information
ICS950812yGLFT
Example:
ICS XXXX y G LF T
Designation for tape and reel packaging
Lead Free (optional)
Package Type
G = TSSOP
Revision Designator (will not correlate with datasheet revision)
Device Type (consists of 3 or 4 digit numbers)
Prefix
ICS, AV = Standard Device
0542G—08/21/03
29
MAX
.555