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Rev.1.00, Apr.25.2003, page 1 of 38
HD151TS207SS
Mother Board Clock Generator
for Intel P4+ Chipset (Springdale)
REJ03D0006-0100Z
Preliminary
Rev.1.00
Apr.25.2003
Description
The HD151TS207SS is Intel CK409T type high-performance, low-skew, low-jitter, PC motherboard clock
generator. It is specifically designed for Intel Pentium®4+ chipset.
Features
•3 differential pairs of current mode control CPU clocks
•1 differential pair of Serial Reference Clock (SRC), selectable 100 MHz/200 MHz
•6 copies PCI clocks and 3 copies PCIF clocks @3.3V, 33.3 MHz
•1 copy PCI clock @3.3 V, selectable 33.3 MHz/25 MHz
•1 copy USB clock @3.3 V, selectable 48 MHz/24 MHz
•1 copy DOT clock @3.3 V, 48 MHz
•4 copies of 3V66 clocks @3.3 V, 66.6 MHz
•1 copy of 3V66/VCH clock @3.3 V, selectable 66.6 MHz/48 MHz
•2 copies of REF clocks @3.3 V, 14.318 MHz
•Power save and clock stop function
•I2CTM serial port programming
•Programmable Clock Control (Spread Spectrum Percentage, Clock Output Skew, Slew Rate)
•Watchdog timer and reset output
•56pin SSOP (300 mils)
Note: I2C is a trademark of Philips Corporation.
Pentium is registered trademark of Intel Corporation
HD151TS207SS
Rev.1.00, Apr.25.2003, page 2 of 38
Key Specifications
•Supply Voltages: VDD = 3.3 V±5%
•CPU clock cycle to cycle jitter = |125ps| (SSC Disabled)
•CPU clock group Skew = 100ps
•3V66 clock group Skew = 250psmax
•PCI clock group Skew = 500psmax
HD151TS207SS
Rev.1.00, Apr.25.2003, page 3 of 38
Pin Arrangement
1
2
3
4
5
6
7
8
9
10
REF0
REF1
VDD_REF
XTAL_IN
XTAL_OUT
VSS_REF
FS2/PCIF_0
FS4/PCIF_1
VDD_PCI
VSS_PCI
PCI_1
MODE/PCI_0
PCI_2
PCI_3
VDD_PCI
VSS_PCI
SEL100_200/PCI_4
SEL33_25/PCI_5
PCI_6
PWRDWN#/SAFE_F#
3V66_0/RESET#
3V66_1
VDD_3V66
PCIF_2
11
12
13
14
15
16
17
18
19
20
21
22
23
24 33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
VSS_48
VDD_48
VTT_PWRGD#
SRC#
SRC
CPU_1
CPU_0#
CPU_0
VSS_CPU
CPU_2
VDD_CPU
PCI_STOP#
VSS_SRC
TEST_CLK#
FS_A
IREF
VSS_A
FS_B
VDD_A
VDD_SRC
VSS_3V66
3V66_2
3V66_3
SCLK
25
26
27
28 29
30
31
32
SEL66_48/3V66_4/VCH
SDATA
SEL48_24/USB_48
FS3/DOT_48
VDD_CPU
CPU_1#
CPU_2#
VSS_IREF
(Top view)
PCI_STOP#, PWRDWN# = 150 kΩInternal Pull-up
HD151TS207SS
Rev.1.00, Apr.25.2003, page 4 of 38
Pin Descriptions
Pin name No. Type Description
VSS_A 54 Ground for PLL
VSS_CPU 45 Ground for outputs
VSS_IREF 53 Ground for current reference
VSS_SRC 39
VSS_3V66 25
VSS_PCI 11, 17
VSS_REF 6
VSS_48 33
Ground
Ground for outputs
VDD_A 55 3.3 V Power Supply for PLL
VDD_CPU 42, 48
VDD_SRC 36
VDD_3V66 24
VDD_PCI 10, 16
VDD_REF 3
VDD_48 34
Power
3.3 V Power Supply for outputs
REF0 1
REF1 2
OUTPUT 3.3 V 14.318 MHz reference clock.
XTAL_IN 4 INPUT 14.318 MHz XTAL input.
XTAL_OUT 5 OUTPUT 14.318 MHz XTAL output.
Don’t connect when an external clock is applied at XTAL_IN.
FS2/PCIF_[0:1] 7,8 INPUT/
OUTPUT Frequency select latch input pin.
/Free running PCI clock 3.3 V output.
PCIF_2 9 OUTPUT Free running PCI clock 3.3 V output.
**MODE/PCI_0 12 INPUT/
OUTPUT Function select latch input pin for pin 22,
1 = Reset#, 0 = clock output.
/PCI clock 3.3 V output.
PCI_[1:3] 13,14,
15 OUTPUT PCI clock 3.3 V outputs.
**SEL100_200/
PCI_4 18 INPUT/
OUTPUT Latched select input for SRC output.
1 = 200 MHz, 0 = 100 MHz
/PCI clock 3.3 V output.
**SEL33_25/PCI_5 19 INPUT/
OUTPUT Latched select input for PCI5 output.
1 = 25 MHz, 0 = 33 MHz
/PCI clock 3.3 V output.
PCI_6 20 OUTPUT PCI clock 3.3 V outputs.
Note: (*): Those pins are 150 kΩinternal pulled-UP.
(**): Those pins are 150 kΩinternal pulled-DOWN.
HD151TS207SS
Rev.1.00, Apr.25.2003, page 5 of 38
Pin Descriptions (cont.)
Pin name No. Type Description
PWRDWN#/
SAFE_F# 21 INPUT
PULL–UP* PWRDWN# / SAFE_F# selectable input.
Default is PWRDWN# input.
Byte15[5] = “1” : SAFE_F# input.
PWRDWN# is all clocks stop pin.
Asynchronous active “Low” input.
When asserted low, all output clocks are disabled.
SAFE_F# is active “Low” input.
When SAFE_F# is “Low” ,frequency mode is changed to the
predefined frequency mode.
3V66_0/RESET# 22 OUTPUT 3V66 / Watchdog RESET# selectable output.
Default is 3V66 output.
This signal is active low and selected by Mode latch input.
3V66_[1:3] 23,26,
27 OUTPUT 3V66 clock 3.3V outputs.
SCLK 28 INPUT
PULL-UP* Clock input for I2C logic.
**SEL66_48/
3V66_4/VCH 29 INPUT/
OUTPUT Latched select input for 3V66/VCH output 1 = 48 MHz,
0 = 66.66 MHz. /3V66 or VCH clock output.
SDATA 30 IN/OUTPUT
PULL-UP* Data input for I2C logic.
**SEL48_24/
USB_48 31 INPUT/
OUTPUT Latched select input for 48_24 MHz output
1 = 24 MHz, 0 = 48 MHz / 24_48 MHz clock 3.3 V output.
FS3/DOT_48 32 INPUT/
OUTPUT Frequency select latch input pin.
/DOT_48 clock 3.3 V output.
VTT_PWRGD# 35 INPUT
PULL-UP* Qualifying input that latches FS_A and FS_B.
When asserted low, FS_A and FS_B are latched.
SRC# 37 OUTPUT “Complementary” clock of Differential Serial Reference Clock.
SRC 38 OUTPUT “True” clock of Differential Serial Reference Clock.
CPU_[0:2]# 40,43,
46 OUTPUT “Complementary” clock of differential CPU clock.
CPU_[0:2] 41,44,
47 OUTPUT “True” clock of differential CPU clock.
PCI_STOP# 49 INPUT
PULL–UP* PCI clocks stop pin. Active “Low” input.
When asserted low, PCI[6:0] and SRC clocks are
synchronously disabled in low state.
Usually this pin does not give to effect PCIF[2:0] clock outputs.
TEST_CLK# 50 INPUT
PULL-UP* Test clock mode pin. Active “Low” input.
FS_[A:B] 51,52 INPUT CPU clocks frequency select latch input.
IREF 52 INPUT A precision resistor is attached to this pin which is connected
to internal current reference.
A resistor is connected between this pin and GNDIREF.
Note: (*): Those pins are 150 kΩinternal pulled-UP.
(**): Those pins are 150 kΩinternal pulled-DOWN
HD151TS207SS
Rev.1.00, Apr.25.2003, page 6 of 38
Block Diagram
3V66[3:1]
1/M2
SSC2
1/N2
1/M1
SSC1
1/N1
1/M0
1/N0
OSC
CK2
CK1
CK0
XTAL
14.318 MHz
REF[1:0]
(14.318MHz)
CPU[2:0]
CPU[2:0]#
* : Latched Input pin.
3.3 V VDD_48 3.3 V VDD_AVSS_48 VSS_A 6×3.3V VDD 6×VSS VSS_IREF IREF
PCI[6:0]
SRC#
SRC
*SEL48_24
*FS_4/3/2A/B
*SEL33_25
*MODE
TEST_CLK#
*SEL66_48
*SEL100_200
VTT_PWRGD#
PWRDWN#/SAFE_F#
PCI_STOP#
SCLK
SDATA
Input
Clock
Select
PLL2
For
CPU
USB
PLL
PLL1
For
SRC
3V66
PCI
PCIF[2:0]
3V66_0/RESET#
3V66_4/VCH
USB_48
DOT_48
Control Logic
VCO0
VCO1
VCO2
Clock
Divider
Clock
Select
Delay
Control
Stop
Control
HD151TS207SS
Rev.1.00, Apr.25.2003, page 7 of 38
I2C Controlled Register Bit Map
Byte0 Control Register
Bit Description Contents Type Default Note
7 Reserved R 0
6 Reserved R 0
5 Reserved R 0
4 Reserved R 0
3 PCI_Stop Reflects the current value
of the external PCI_STOP# pin 0 = PCI_STOP# pin is Low
1 = PCI_STOP# pin is High RX
2 Reserved R X
1 FS_B Reflects the value of the
FS_B pin sampled on power up 0 = FS_B Low at power up
1 = FS_B High at power up RX
0 FS_A Reflects the value of the
FS_A pin sampled on power up 0 = FS_A Low at power up
1 = FS_A High at power up RX
See
Table
1
Table1 Clock Frequency Function Table
Byte6
Bit5 FS_A FS_B CPU
[MHz] SRC
[MHz] 3V66
[MHz] PCIF
PCI
[MHz]
REF0
REF1
[MHz]
USB
DOT
[MHz]
Note
0 0 0 100 100/200 66 33 14.318 48
0 0 1 200 100/200 66 33 14.318 48
0 1 0 133 100/200 66 33 14.318 48
0 1 1 166 100/200 66 33 14.318 48
1 0 0 200 100/200 66 33 14.318 48
1 0 1 400 100/200 66 33 14.318 48
1 1 0 266 100/200 66 33 14.318 48
1 1 1 333 100/200 66 33 14.318 48
Table2 Test Clock select table
TEST_CLK# CPU
[MHz] SRC
[MHz] 3V66
[MHz] PCIF
PCI
[MHz]
REF0
REF1
[MHz]
USB
DOT
[MHz]
Note
1 REF/2 REF/2 REF/4 REF/8 REF REF/2
0 Hi–Z Hi–Z Hi–Z Hi–Z Hi–Z Hi–Z
See Note1,
Table3
Note: 1. REF is a clock over driven on the XIN during test mode.
HD151TS207SS
Rev.1.00, Apr.25.2003, page 8 of 38
I2C Controlled Register Bit Map (cont.)
Table3 FS_A and FS_B pin Input level
Logic Level Min Voltage Max Voltage
0 (Low) 0.35V
1 (High) 0.70V 
Byte1 Control Register
Bit Description Contents Type Default Note
7 Allow control of SCR with assertion
of PCI_STOP# 0 = Free running
1 = Stopped with
PCI_STOP#
RW 0 See
Table5
6 SRC Output enable 0 = Disabled (tristate)
1 = Enabled RW 1
5 Reserved RW 1
4 Reserved RW 1
3 Reserved RW 1
2 CPU2 Output enable 0 = Disabled (tristate)
1 = Enabled RW 1
1 CPU1 Output enable 0 = Disabled (tristate)
1 = Enabled RW 1
0 CPU0 Output enable 0 = Disabled (tristate)
1 = Enabled RW 1
Byte2 Control Register
Bit Description Contents Type Default Note
7 SRC_Pwrdwn drive mode 0 = Driven in power down,
1 = Tristate RW 0
6 SRC_Stop drive mode 0 = Driven when stopped,
1 = Tristate RW 0
See
Table5
5 CPU2_Pwrdwn drive mode 0 = Driven in power down,
1 = Tristate RW 0
4 CPU1_Pwrdwn drive mode 0 = Driven in power down,
1 = Tristate RW 0
3 CPU0_Pwrdwn drive mode 0 = Driven in power down,
1 = Tristate RW 0
2 Reserved RW 0
1 Reserved RW 0
0 Reserved RW 0
See
Table4
HD151TS207SS
Rev.1.00, Apr.25.2003, page 9 of 38
I2C Controlled Register Bit Map (cont.)
Table4 CPU Clock Power Management Truth Table
Signal Pin
PWRDWN# PWRDWN#
Tristate Bit
Byte2[5:3]
Non-Stop
Outputs
Byte1[5:3] = 1
Note
CPU[2:0] 1 X Running
CPU[2:0] 0 0 Driven @ Iref x2 See Note1
CPU[2:0] 0 1 Tristate
Note: 1. Iref = VDD/(3Rr) = 3.3/(3x475) = 2.32 mA,
Iref x2 = 4.6 mA (Voh @Z: 0.23 V @50 Ω)
Table5 SRC Clock Power Management Truth Table
Signal Pin
PWRDWN# Pin
PCI_STOP# PCI_STOP#
Tristate Bit
Byte2[6]
PWRDWN#
Tristate Bit
Byte2[7]
Non-Stop
Outputs
Byte1[7] = 1
Stoppable
Outputs
Byte1[7] = 0
Note
SRC 1 1 X X Running Running
SRC100XRunningDriven@
Iref x6 See Note1
SRC101XRunningTristate
SRC 0 X X 0 Driven @
Iref x2 Driven @
Iref x2 See Note1
SRC 0 X X 1 Tristate Tristate
Note: 1. Iref = VDD/(3Rr) = 3.3/(3x475) = 2.32 mA
Iref x6 = 13.9 mA (Voh @Z: 0.7 V @50 Ω)
Iref x2 = 4.6 mA (Voh @Z: 0.23 V @50 Ω)
Byte3 Control Register
Bit Description Contents Type Default Note
7 PCI_Stop control 0 = Enabled, all stoppable PCI
and SRC clocks are stopped.
1 = Disabled
RW 1
6 PCI_6 Output enable 0 = Disabled, 1 = Enabled RW 1
5 PCI_5 Output enable 0 = Disabled, 1 = Enabled RW 1
4 PCI_4 Output enable 0 = Disabled, 1 = Enabled RW 1
3 PCI_3 Output enable 0 = Disabled, 1 = Enabled RW 1
2 PCI_2 Output enable 0 = Disabled, 1 = Enabled RW 1
1 PCI_1 Output enable 0 = Disabled, 1 = Enabled RW 1
0 PCI_0 Output enable 0 = Disabled, 1 = Enabled RW 1
HD151TS207SS
Rev.1.00, Apr.25.2003, page 10 of 38
I2C Controlled Register Bit Map (cont.)
Byte4 Control Register
Bit Description Contents Type Default Note
7 USB_48 2x output drive 0 = 2x Drive strength,
1 = Normal RW 0
6 USB_48MHz Output Enable 0 = Disabled,
1 = Enabled RW 1
5 Allow control of PCIF_2 with
assertion of PCI_STOP# 0 = Free Running
1 = Stopped with PCI_STOP# RW 0
4 Allow control of PCIF_1 with
assertion of PCI_STOP# 0 = Free Running
1 = Stopped with PCI_STOP# RW 0
3 Allow control of PCIF_0 with
assertion of PCI_STOP# 0 = Free Running
1 = Stopped with PCI_STOP# RW 0
2 PCIF_2 Output enable 0 = Disabled, 1 = Enabled RW 1
1 PCIF_1 Output enable 0 = Disabled, 1 = Enabled RW 1
0 PCIF_0 Output enable 0 = Disabled, 1 = Enabled RW 1
Byte5 Control Register
Bit Description Contents Type Default Note
7 DOT_48MHz Output Enable 0 = Disabled, 1 = Enabled RW 1
6 Reserved RW 1
5 VCH Select 66MHz / 48MHz 0 = 3V66 mode
1 = VCH (48 MHz) mode RW 0
4 3V66_4/VCH Output Enable 0 = Disabled (tristate),
1 = Enabled RW 1
3 3V66_3 Output Enable 0 = Disabled, 1 = Enabled RW 1
2 3V66_2 Output Enable 0 = Disabled, 1 = Enabled RW 1
1 3V66_1 Output Enable 0 = Disabled, 1 = Enabled RW 1
0 3V66_0 Output Enable 0 = Disabled, 1 = Enabled RW 1
Byte6 Control Register
Bit Description Contents Type Default Note
7 Test Clock Mode 0 = Disabled, 1 = Enabled RW 0
6 Reserved RW 0
5 FS_A & FS_B Operation 0 = Normal, 1 = Test mode RW 0
4 SRC Frequency Select 0 = 100MHz, 1 = 200 MHz RW 0
3 Reserved RW 0
2 Spread Spectrum Mode 0 = Spread OFF
1 = Spread ON RW 0 See
B9[7:6]
1 REF1 Output Enable 0 = Disabled, 1 = Enabled RW 1
0 REF0 Output Enable 0 = Disabled, 1 = Enabled RW 1