SPECTRALINEAR CY28443-3

CY28443-3
Clock Generator for Intel£Calistoga Chipset
Features
• 33 MHz PCI clock
• Buffered Reference Clock 14.318 MHz
• Compliant to Intel® CK410M
• Low-voltage frequency select input
• Selectable CPU frequencies
• I2C support with readback capabilities
• Differential CPU clock pairs
• 100 MHz differential SRC clocks
• Ideal Lexmark Spread Spectrum profile for maximum
electromagnetic interference (EMI) reduction
• 96 MHz differential dot clock
• 3.3V power supply
• 27 MHz Spread and Non-spread video clock
• 56-Pin SSOP/TSSOP packages
• 48 MHz USB clocks
CPU
• SRC clocks independently stoppable through
CLKREQ#[A:B]
SRC
x2 / x3 x5/6/7
PCI REF DOT96 USB_48M LCD 27M
x6
x1
x1
x1
x1
x2
• 96 /100-MHz Spreadable differential video clock.
Block Diagram
14.318MHz
Crystal
SEL_CLKREQ
PCI_STP#
PLL Reference
CPU
PLL
CPU_STP#
CLKREQ[A:B]#
Divider
IREF
VDD
CPUT[0:1]
CPUC[0:1]
VDD
CPUT2_ITP/SRCT11
CPUC2_ITP/SRCC11
ITP_SEL
VDD
SRCT([2:5],[8:9])
SRCC([2:5],[8:9])
FS[C:A]
VDD
PCI[3:5]
VDD_PCI
LVDS
PLL
Divider
PCIF[0:1]
VDD
SRCT0/100MT_SST
SRCC0/100MC_SST
VDD48
27MSpread
FCTSEL1
Fixed
PLL
Divider
VDD48
DOT96T
DOT96C
VDD48
48M
27M
PLL
Divider
VTT_PWRGD#/PD
SDATA
SCLK
VDD48
27MNon-spread
VDD
VSS
PCI3
PCI4
PCI5 / FCT_SEL1
VSS
VDD
ITP_SEL / PCIF0
PCIF1
VTT#/PD
VDD
FSA / 48M
VSS
DOT96T / 27M non-spread
DOT96C / 27M_25M spread
FSB
SRCT0 / 100MT_SST
SRCC0 / 100MC_SST
SRCT2
SRCC2
VDD
SRCT3
SRCC3
SRCT4
SRCC4
SRCT5 _SATA
SRCC5_SATA
VDD
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
CY28443-3
XIN
XOUT
Pin Configuration
VDD
REF1
56
55
54
53
52
51
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
PCI2 / SEL_CLKREQ
PCI_STP#
CPU_STP#
FSC
REF1/FCTSEL0
VSS
XIN
XOUT
VDD
SDATA
SCLK
VSS
CPUT0
CPUC0
VDD
CPUT1
CPUC1
IREF
VSS
VDD
CPUT2_ITP/SRCT11
CPUC2_ITP/SRCC11
VDD
SRCT9 / CLKREQ9
SRCC9 /CLKREQ8
SRCT8
SRCC8
VSS
I2C
Logic
Rev 1.0, November 20, 2006
2200 Laurelwood Road, Santa Clara, CA 95054
Page 1 of 23
Tel:(408) 855-0555
Fax:(408) 855-0550
www.SpectraLinear.com
CY28443-3
Pin Descriptions
Pin No.
Name
Type
Description
1, 7, 11, 21, VDD
28, 34, 42, 48
PWR
3.3V power supply.
2, 6, 13, 29,
45, 51
VSS
GND
Ground.
3,4
PCI[3:4]
O, SE 33-MHz clock.
5
PCI5/FCTSEL1
O, SE 33-MHz clock/3.3 LVTTL input for selecting for pin 14, 15 (DOT96[T/C],
PD 27M-non-spread and Spread) and pin 17,18 (SRC[T/C]0 or 100M[T/C]_SST)
(sampled on the VTT_PWRGD# assertion).
FCTSEL1 FCTSEL0 PIN 14
PIN 15
0
0
DOT96T
DOT96C
0
1
DOT96T
DOT96C
1
0
27M_non spread 27M_Spread
1
1
OFF Low
TBD
PIN 17
100MT_SST
SRCT0
SRCT0
SRCT0
PIN 18
100MC_SST
SRCC0
SRCC0
SRCC0
8
ITP_SEL/PCIF0
I/O, SE 3.3V LVTTL input to enable SRC[T/C]11or CPU[T/C]2_ITP/33-MHz clock
output. (sampled on the VTT_PWRGD# assertion).
1 = CPU_ITP, 0 = SRC11
9
PCIF1
I/O, SE 33-MHz clock.
10
VTT_PWRGD#/PD
12
FSA/48M
14, 15
O, DIF Fixed 96-MHz Differential Clock/ Single ended 27-MHz clocks. When
DOT96T/27M_non
configured for 27-MHz, only the clock on pin 15 contains spread. Selected via
spread
FCTSEL[0:1] at VTT_PWRGD# assertion.
DOT96C/27M_Spread
16
FSB
17,18
SRC[T/C]0/
100M[T/C]_SST
I, PU
3.3V LVTTL input. This pin is a level sensitive strobe used to latch the FS[C:A],
ITP_SEL, FCTSEL[1:0], SEL_CLKREQ#. After VTT_PWRGD# (active LOW)
assertion, this pin becomes a real-time input for asserting power-down (active
HIGH).
I/O
3.3V-tolerant input for CPU frequency selection/Fixed 48-MHz clock output.
Refer to DC Electrical Specification Table for Vil_FS and Vih_FS specifications.
I
3.3V-tolerant input for CPU frequency selection.
Refer to DC Electrical Specification Table for Vil_FS and Vih_FS specifications
O,DIF 100-MHz Differential Serial Reference Clock/ 100-MHz LVDS Differential
Clock.
19,20,22,23, SRC[T/C]
24,25,30,31
O, DIF 100-MHz Differential Serial Reference Clocks.
26,27
SRC[T/C]5_SATA
O, DIF Differential serial reference clock. Recommended output for SATA.
33,32
SRCT9/CLKREQ#A,
SRCC9/CLKREQ#B
I/O, PU 3.3V LVTTL input for enabling assigned SRC clock (active LOW) / 100-MHz
Serial Reference Clock.
Default function is CLKREQ#
36,35
CPUT2_ITP/SRCT11, O, DIF Selectable differential CPU / SRC clock output.
CPUC2_ITP/SRCC11
ITP_EN = 0 @ VTT_PWRGD# assertion = SRC11,
ITP_EN = 1@ VTT_PWRGD# assertion =CPU2_ITP
37
VDDA
PWR
3.3V power supply for PLL.
38
VSSA
GND
Ground for PLL.
39
IREF
I
44,43,41,40
CPU[T/C][0:1]
46
SCLK
I
47
SDATA
I/O
OD
49
XOUT
50
XIN
Rev 1.0, November 20, 2006
A precision resistor is attached to this pin, which is connected to the internal
current reference.
O, DIF Differential CPU clock outputs.
SMBus-compatible SCLOCK.
SMBus-compatible SDATA.
O, SE 14.318-MHz crystal output.
I
14.318-MHz crystal input.
Page 2 of 23
CY28443-3
Pin Descriptions (continued)
Pin No.
Name
52
REF1/FCTSEL0
Type
Description
I/O, SE Fixed 14.318-MHz Clock Output/3.3 LVTTL input for selecting for pin 14, 15
PD (DOT96[T/C], 27M-non-spread and Spread) and pin 17,18 (SRC[T/C]0 or
100M[T/C]_SST)
(sampled on the VTT_PWRGD# assertion).
FCTSEL1 FCTSEL0 PIN 14
PIN 15
0
0
DOT96T
DOT96C
0
1
DOT96T
DOT96C
1
0
27M_non spread 27M_Spread
1
1
OFF Low
TBD
53
FSC
I/O
PIN 17
100MT_SST
SRCT0
SRCT0
SRCT0
PIN 18
100MC_SST
SRCC0
SRCC0
SRCC0
3.3V-tolerant input for CPU frequency selection.
Refer to DC Electrical Specification Table for VilFS_C, VimFS_C and VihFS_C
specifications
54
CPU_STP#
I, PU
3.3V LVTTL input for CPU_STP# active LOW.
55
PCI_STP#
I, PU
3.3V LVTTL input for PCI_STP# active LOW.
56
PCI2/SEL_CLKREQ# I/O, PD Fixed 33-MHz clock output/3.3V-tolerant input for CLKREQ# pins 32 and 33
SE
selection
(sampled on the VTT_PWRGD# assertion).
0 = CLKREQ#[A:B] functionality
1 = SRC[T/C]9 functionality
Table 1. Frequency Select Table FSA, FSB and FSC
FSC
FSB
FSA
CPU
SRC
PCIF/PCI
27MHz
REF0
DOT96
USB
1
0
1
100 MHz
100 MHz
33 MHz
27 MHz
14.318 MHz
96 MHz
48 MHz
0
0
1
133 MHz
100 MHz
33 MHz
27 MHz
14.318 MHz
96 MHz
48 MHz
0
1
1
166 MHz
100 MHz
33 MHz
27 MHz
14.318 MHz
96 MHz
48 MHz
0
1
0
200 MHz
100 MHz
33 MHz
27 MHz
14.318 MHz
96 MHz
48 MHz
Frequency Select Pins (FSA, FSB, and FSC)
Host clock frequency selection is achieved by applying the
appropriate logic levels to FSA, FSB, FSC inputs prior to
VTT_PWRGD# assertion (as seen by the clock synthesizer).
Upon VTT_PWRGD# being sampled low by the clock chip
(indicating processor VTT voltage is stable), the clock chip
samples the FSA, FSB, and FSC input values. For all logic
levels of FSA, FSB, and FSC, VTT_PWRGD# employs a
one-shot functionality in that once a valid low on
VTT_PWRGD# has been sampled, all further VTT_PWRGD#,
FSA, FSB, and FSC transitions will be ignored, except in test
mode.
Serial Data Interface
To enhance the flexibility and function of the clock synthesizer,
a two-signal serial interface is provided. Through the Serial
Data Interface, various device functions, such as individual
clock output buffers, can be individually enabled or disabled.
The registers associated with the Serial Data Interface
initialize to their default setting upon power-up, and therefore
use of this interface is optional. Clock device register changes
are normally made upon system initialization, if any are
required. The interface cannot be used during system
operation for power management functions.
Data Protocol
The clock driver serial protocol accepts byte write, byte read,
block write, and block read operations from the controller. For
block write/read operation, the bytes must be accessed in
sequential order from lowest to highest byte (most significant
bit first) with the ability to stop after any complete byte has
been transferred. For byte write and byte read operations, the
system controller can access individually indexed bytes. The
offset of the indexed byte is encoded in the command code,
as described in Table 2.
The block write and block read protocol is outlined in Table 3
while Table 4 outlines the corresponding byte write and byte
read protocol. The slave receiver address is 11010010 (D2h).
Table 2. Command Code Definition
Bit
7
(6:0)
Description
0 = Block read or block write operation, 1 = Byte read or byte write operation
Byte offset for byte read or byte write operation. For block read or block write operations, these bits should be
'0000000'
Rev 1.0, November 20, 2006
Page 3 of 23
CY28443-3
Table 3. Block Read and Block Write Protocol
Block Write Protocol
Bit
1
8:2
9
Description
Start
Block Read Protocol
Bit
1
Slave address – 7 bits
Write
8:2
9
Description
Start
Slave address – 7 bits
Write
10
Acknowledge from slave
10
Acknowledge from slave
18:11
Command Code – 8 bits
18:11
Command Code – 8 bits
19
Acknowledge from slave
19
Acknowledge from slave
Byte Count – 8 bits
(Skip this step if I2C_EN bit set)
20
Repeat start
27:20
28
36:29
37
45:38
46
Acknowledge from slave
27:21
Slave address – 7 bits
Data byte 1 – 8 bits
28
Read = 1
Acknowledge from slave
29
Acknowledge from slave
Data byte 2 – 8 bits
Acknowledge from slave
....
Data Byte /Slave Acknowledges
....
Data Byte N – 8 bits
....
Acknowledge from slave
....
Stop
37:30
38
46:39
47
55:48
56
Byte Count from slave – 8 bits
Acknowledge
Data byte 1 from slave – 8 bits
Acknowledge
Data byte 2 from slave – 8 bits
Acknowledge
....
Data bytes from slave / Acknowledge
....
Data Byte N from slave – 8 bits
....
NOT Acknowledge
....
Stop
Table 4. Byte Read and Byte Write Protocol
Byte Write Protocol
Bit
1
8:2
9
Description
Start
Slave address – 7 bits
Write
Byte Read Protocol
Bit
1
8:2
9
Description
Start
Slave address – 7 bits
Write
10
Acknowledge from slave
10
Acknowledge from slave
18:11
Command Code – 8 bits
18:11
Command Code – 8 bits
19
Acknowledge from slave
19
Acknowledge from slave
Data byte – 8 bits
20
Repeated start
27:20
28
Acknowledge from slave
29
Stop
Rev 1.0, November 20, 2006
27:21
28
Slave address – 7 bits
Read
29
Acknowledge from slave
37:30
Data from slave – 8 bits
38
NOT Acknowledge
39
Stop
Page 4 of 23
CY28443-3
Control Registers
Byte 0: Control Register 0
Bit
7
6
5
@Pup
1
1
1
Name
RESERVED
RESERVED
SRC[T/C]5
4
1
SRC[T/C]4
3
1
SRC[T/C]3
2
1
SRC[T/C]2
1
0
1
1
RESERVED
SRC[T/C]0
/100M[T/C]_SST
Description
RESERVED
RESERVED
SRC[T/C]5 Output Enable
0 = Disable (Tri-state), 1 = Enable
SRC[T/C]4 Output Enable
0 = Disable (Tri-state), 1 = Enable
SRC[T/C]3 Output Enable
0 = Disable (Tri-state), 1 = Enable
SRC[T/C]2 Output Enable
0 = Disable (Tri-state), 1 = Enable
RESERVED, Set = 1
SRC[T/C]0 /100M[T/C]_SST Output Enable
0 = Disable (Hi-Z), 1 = Enable
Byte 1: Control Register 1
Bit
@Pup
Name
7
1
PCIF0
6
1
5
1
USB_48MHz
USB_48M MHz Output Enable
0 = Disabled, 1 = Enabled
4
1
RESERVED
RESERVED
3
1
REF1
2
1
CPU[T/C]1
CPU[T/C]1 Output Enable
0 = Disable (Tri-state), 1 = Enabled
1
1
CPU[T/C]0
CPU[T/C]0 Output Enable
0 = Disable (Tri-state), 1 = Enabled
0
0
27M_nss_DOT_96[T/C]
CPU, SRC, PCI, PCIF
spread enable
Description
PCIF0 Output Enable
0 = Disabled, 1 = Enabled
27M nonspread and DOT_96 MHz Output Enable
0 = Disable (Tri-state), 1 = Enabled
REF1 Output Enable
0 = Disabled, 1 = Enabled
PLL1 (CPU PLL) Spread Spectrum Enable
0 = Spread off, 1 = Spread on
Byte 2: Control Register 2
Bit
@Pup
Name
7
1
PCI5
PCI5 Output Enable
0 = Disabled, 1 = Enabled
6
1
PCI4
PCI4 Output Enable
0 = Disabled, 1 = Enabled
5
1
PCI3
PCI3 Output Enable
0 = Disabled, 1 = Enabled
4
1
PCI2
PCI2 Output Enable
0 = Disabled, 1 = Enabled
3
1
RESERVED
RESERVED
RESERVED
2
1
RESERVED
1
1
CPU[T/C]2
0
1
PCIF1
Rev 1.0, November 20, 2006
Description
CPU[T/C]2 Output Enable
0 = Disabled (Hi-Z), 1 = Enabled
PCIF1 Output Enable
0 = Disabled, 1 = Enabled
Page 5 of 23
CY28443-3
Byte 3: Control Register 3
Bit
@Pup
Name
Description
7
0
RESERVED
RESERVED, Set = 0
6
0
RESERVED
RESERVED, Set = 0
5
0
SRC5
Allow control of SRC[T/C]5 with assertion of PCI_STP# or SW PCI_STP#
0 = Free running, 1 = Stopped with PCI_STP#
4
0
SRC4
Allow control of SRC[T/C]4 with assertion of PCI_STP# or SW PCI_STP#
0 = Free running, 1 = Stopped with PCI_STP#
3
0
SRC3
Allow control of SRC[T/C]3 with assertion of PCI_STP# or SW PCI_STP#
0 = Free running, 1 = Stopped with PCI_STP#
2
0
SRC2
Allow control of SRC[T/C]2 with assertion of PCI_STP# or SW PCI_STP#
0 = Free running, 1 = Stopped with PCI_STP#
1
0
RESERVED
0
0
SRC0
RESERVED, Set = 0
Allow control of SRC[T/C]0 with assertion of PCI_STP# or SW PCI_STP#
0 = Free running, 1 = Stopped with PCI_STP#
Byte 4: Control Register 4
Bit
@Pup
Name
7
0
100M[T/C]_SST
Description
6
0
DOT96[T/C]
5
1
SRC[T/C]
4
0
PCIF1
Allow control of PCIF1 with assertion of SW and HW PCI_STP#
0 = Free running, 1 = Stopped with PCI_STP#
3
0
PCIF0
Allow control of PCIF0 with assertion of SW and HW PCI_STP#
0 = Free running, 1 = Stopped with PCI_STP#
2
1
CPU[T/C]2
Allow control of CPU[T/C]2 with assertion of CPU_STP#
0 = Free running, 1 = Stopped with CPU_STP#
1
1
CPU[T/C]1
Allow control of CPU[T/C]1 with assertion of CPU_STP#
0 = Free running, 1 = Stopped with CPU_STP#
0
1
CPU[T/C]0
Allow control of CPU[T/C]0 with assertion of CPU_STP#
0 = Free running, 1 = Stopped with CPU_STP#
100M[T/C]_SST PWRDWN Drive Mode
0 = Driven in PWRDWN, 1 = Tri-state
DOT PWRDWN Drive Mode
0 = Driven in PWRDWN, 1 = Tri-state
SRC[T/C] Stop Drive Mode when CLKREQ# asserted
0 = Driven, 1 = Tri-state
Byte 5: Control Register 5
Bit
@Pup
Name
7
0
SRC[T/C]
SRC[T/C] Stop Drive Mode
0 = Driven when PCI_STP# asserted, 1 = Tri-state when PCI_STP#
asserted
6
0
CPU[T/C]2
CPU[T/C]2 Stop Drive Mode
0 = Driven when CPU_STP# asserted, 1 = Tri-state when CPU_STP#
asserted
5
0
CPU[T/C]1
CPU[T/C]1 Stop Drive Mode
0 = Driven when CPU_STP# asserted, 1 = Tri-state when CPU_STP#
asserted
4
0
CPU[T/C]0
CPU[T/C]0 Stop Drive Mode
0 = Driven when CPU_STP# asserted, 1 = Tri-state when CPU_STP#
asserted
3
0
SRC[T/C]
SRC[T/C] PWRDWN Drive Mode
0 = Driven when PD asserted, 1 = Tri-state when PD asserted
2
0
CPU[T/C]2
CPU[T/C]2 PWRDWN Drive Mode
0 = Driven when PD asserted, 1 = Tri-state when PD asserted
Rev 1.0, November 20, 2006
Description
Page 6 of 23
CY28443-3
Byte 5: Control Register 5 (continued)
Bit
@Pup
Name
Description
1
0
CPU[T/C]1
CPU[T/C]1 PWRDWN Drive Mode
0 = Driven when PD asserted, 1 = Tri-state when PD asserted
0
0
CPU[T/C]0
CPU[T/C]0 PWRDWN Drive Mode
0 = Driven when PD asserted, 1 = Tri-state when PD asserted
Byte 6: Control Register 6
Bit
@Pup
Name
Description
7
0
TEST_SEL
6
0
TEST_MODE
5
1
REF1
REF0 Output Drive Strength
0 = Low, 1 = High
4
1
REF0
REF0 Output Drive Strength
0 = Low, 1 = High
3
1
2
HW
FSC
FSC Reflects the value of the FSC pin sampled on power-up
0 = FSC was low during VTT_PWRGD# assertion
1
HW
FSB
FSB Reflects the value of the FSB pin sampled on power-up
0 = FSB was low during VTT_PWRGD# assertion
0
HW
FSA
FSA Reflects the value of the FSA pin sampled on power-up
0 = FSA was low during VTT_PWRGD# assertion
REF/N or Tri-state Select
0 = Tri-state, 1 = REF/N Clock
Test Clock Mode Entry Control
0 = Normal operation, 1 = REF/N or Tri-state mode,
PCI, PCIF and SRC clock SW PCI_STP Function
outputs except those set 0=SW PCI_STP assert, 1= SW PCI_STP deassert
to free running
When this bit is set to 0, all STOPPABLE PCI, PCIF, and SRC outputs will
be stopped in a synchronous manner with no short pulses.
When this bit is set to 1, all STOPPED PCI, PCIF, and SRC outputs will
resume in a synchronous manner with no short pulses.
Byte 7: Vendor ID
Bit
@Pup
Name
Description
7
0
Revision Code Bit 3
Revision Code Bit 3
6
0
Revision Code Bit 2
Revision Code Bit 2
5
0
Revision Code Bit 1
Revision Code Bit 1
4
1
Revision Code Bit 0
Revision Code Bit 0
3
1
Vendor ID Bit 3
Vendor ID Bit 3
2
0
Vendor ID Bit 2
Vendor ID Bit 2
1
0
Vendor ID Bit 1
Vendor ID Bit 1
0
0
Vendor ID Bit 0
Vendor ID Bit 0
Byte 8: Control Register 8
Bit
@Pup
Name
Description
7
0
CPU_SS
0:–0.5% (Peak to peak)
1: –1.0% (Peak to peak)
6
0
CPU-DWN_SS
0: Down Spread
1: Center Spread
5
0
RESERVED
RESERVED, Set = 0
4
0
RESERVED
RESERVED, Set = 0
3
0
RESERVED
RESERVED, Set = 0
2
1
48M
48-MHz Output Drive Strength
0 = Low, 1 = High
Rev 1.0, November 20, 2006
Page 7 of 23
CY28443-3
Byte 8: Control Register 8 (continued)
Bit
@Pup
Name
Description
1
1
RESERVED
RESERVED, Set = 1
0
1
PCIF0
33-MHz Output Drive Strength
0 = Low, 1 = High
Byte 9: Control Register 9
Bit
@Pup
Name
Description
7
0
S3
27_96_100_SSC Spread Spectrum Selection table:
S[3:0] SS%
‘0000’ = –0.5%(Default value)
‘0001’ = –1.0%
‘0010’ = –1.5%
‘0011’ = –2.0%
‘0100’ = ±0.25%
‘0101’ = ±0.5%
‘0110’ = ±0.75%
‘0111’ = ±1.0%
‘1000’ = –0.35%
‘1001’ = –0.68%
‘1010’ = –1.09%
‘1011’ = –1.425%
‘1100’ = ±0.17%
‘1101’ = ±0.34%
‘1110’ = ±0.545%
‘1111’ = ±0.712%
6
0
S2
5
0
S1
4
0
S0
3
1
RESERVED
RESERVED, Set = 1
2
1
27M Spread
27-MHz Spread Output Enable
0 = Disable (Hi-Z), 1 = Enable
1
1
27M_SS/LCD100M
Spread Enable
27M_SS/LCD100M Spread spectrum enable.
0 = Disable, 1 = Enable.
0
0
PCIF1
33-MHz Output Drive Strength
0 = Low, 1 = High
Byte 10: Control Register 10
Bit
@Pup
Name
Description
7
1
SRC[T/C]11
SRC[T/C]11 Output Enable
0 = Disable (Hi-Z), 1 = Enable
6
1
SRC[T/C]9
SRC[T/C]9 Output Enable
0 = Disable (Hi-Z), 1 = Enable
5
1
RESERVED
RESERVED, Set = 1
4
1
SRC[T/C]8
SRC[T/C]8 Output Enable
0 = Disable (Hi-Z), 1 = Enable
3
0
SRC[T/C]9
Allow control of SRC[T/C]9 with assertion of SW PCI_STP#
0 = Free running, 1 = Stopped with PCI_STP#
2
0
SRC[T/C]11
Allow control of SRC[T/C]11 with assertion of SW PCI_STP#
0 = Free running, 1 = Stopped with PCI_STP#
1
0
RESERVED
RESERVED, Set = 0
0
0
SRC[T/C]8
Allow control of SRC[T/C]8 with assertion of SW PCI_STP#
0 = Free running, 1 = Stopped with PCI_STP#
Rev 1.0, November 20, 2006
Page 8 of 23
CY28443-3
Byte 11: Control Register 11
Bit
@Pup
Name
Description
7
0
RESERVED
RESERVED Set = 0
6
HW
RESERVED
RESERVED
5
HW
RESERVED
RESERVED
4
HW
RESERVED
RESERVED
3
0
27MHz
27MHz (spread and non-spread) Output Drive Strength
0 = Low, 1 = High
2
0
RESERVED
RESERVED Set = 0
1
0
RESERVED
RESERVED Set = 0
0
HW
RESERVED
RESERVED
Byte 12: Control Register 12
Bit
@Pup
Name
Description
7
0
CLKREQ#A
CLKREQ#A Enable
0 = Disable 1 = Enable
6
1
CLKREQ#B
CLKREQ#B Enable
0 = Disable 1 = Enable
5
1
RESERVED
RESERVED
4
1
RESERVED
RESERVED
3
1
RESERVED
RESERVED
2
1
RESERVED
RESERVED
1
1
RESERVED
RESERVED
0
1
RESERVED
RESERVED
Byte 13: Control Register 13
Bit
@Pup
Name
Description
7
1
RESERVED
RESERVED
6
1
96/100M Clock Speed
96/100 SRC Clock Speed
0 = 96MHz 1 = 100MHz
5
1
RESERVED
RESERVED, Set = 1
4
1
RESERVED
RESERVED, Set = 1
3
1
PCI5
PCI5 (Spread and Non-spread) Output Drive Strength
0 = Low, 1 = High
2
1
PCI4
PCI4 (Spread and Non-spread) Output Drive Strength
0 = Low, 1 = High
1
1
PCI3
PCI3 (Spread and Non-spread) Output Drive Strength
0 = Low, 1 = High
0
1
PCI2
PCI2 (Spread and Non-spread) Output Drive Strength
0 = Low, 1 = High
Byte 14: Control Register 14
Bit
@Pup
Name
Description
7
1
RESERVED
RESEREVD
6
0
RESERVED
RESERVED
5
0
RESERVED
RESERVED
4
0
CLKREQ#A
SRC[T/C]5 Control
0 = SRC[T/C]5 not stoppable by CLKREQ#A
1 = SRC[T/C]5 stoppable by CLKREQ#A
Rev 1.0, November 20, 2006
Page 9 of 23
CY28443-3
Byte 14: Control Register 14 (continued)
Bit
@Pup
Name
Description
3
0
CLKREQ#A
SRC[T/C]4 Control
0 = SRC[T/C]4 not stoppable by CLKREQ#A
1= SRC[T/C]4 stoppable by CLKREQ#A
2
0
CLKREQ#A
SRC[T/C]3 Control
0 = SRC[T/C]3 not stoppable by CLKREQ#A
1= SRC[T/C]3 stoppable by CLKREQ#A
1
0
CLKREQ#A
SRC[T/C]2 Control
0 = SRC[T/C]2 not stoppable by CLKREQ#A
1= SRC[T/C]2 stoppable by CLKREQ#A
0
0
CLKREQ#A
SRC[T/C]1 Control
0 = SRC[T/C]1 not stoppable by CLKREQ#A
1= SRC[T/C]1 stoppable by CLKREQ#A
Byte 15: Control Register 15
Bit
@Pup
Name
Description
7
1
CLKREQ#B
SRC[T/C]8 Control
0 = SRC[T/C]8 not stoppable by CLKREQ#B
1= SRC[T/C]8 stoppable by CLKREQ#B
6
0
RESERVED
RESERVED
5
0
RESERVED
RESERVED
4
0
CLKREQ#B
SRC[T/C]5 Control
0 = SRC[T/C]5 not stoppable by CLKREQ#B
1= SRC[T/C]5 stoppable by CLKREQ#B
3
0
CLKREQ#B
SRC[T/C]4 Control
0 = SRC[T/C]4 not stoppable by CLKREQ#B
1= SRC[T/C]4 stoppable by CLKREQ#B
2
0
CLKREQ#B
SRC[T/C]3 Control
0 = SRC[T/C]3 not stoppable by CLKREQ#B
1= SRC[T/C]3 stoppable by CLKREQ#B
1
0
CLKREQ#B
SRC[T/C]2 Control
0 = SRC[T/C]2 not stoppable by CLKREQ#B
1= SRC[T/C]2 stoppable by CLKREQ#B
0
0
CLKREQ#B
SRC[T/C]1 Control
0 = SRC[T/C]1 not stoppable by CLKREQ#B
1= SRC[T/C]1 stoppable by CLKREQ#B
Rev 1.0, November 20, 2006
Page 10 of 23
CY28443-3
Table 5. Crystal Recommendations
Frequency
(Fund)
Cut
Loading Load Cap
Drive
(max.)
Shunt Cap
(max.)
Motional
(max.)
Tolerance
(max.)
Stability
(max.)
Aging
(max.)
14.31818 MHz
AT
Parallel
0.1 mW
5 pF
0.016 pF
35 ppm
30 ppm
5 ppm
20 pF
The CY28443-3 requires a Parallel Resonance Crystal.
Substituting a series resonance crystal will cause the
CY28443-3 to operate at the wrong frequency and violate the
ppm specification. For most applications there is a 300-ppm
frequency shift between series and parallel crystals due to
incorrect loading.
Clock Chip
Ci2
Ci1
Pin
3 to 6p
Crystal Loading
Crystal loading plays a critical role in achieving low ppm performance. To realize low ppm performance, the total capacitance
the crystal will see must be considered to calculate the appropriate capacitive loading (CL).
X2
X1
Cs1
Cs2
Trace
2.8pF
The following diagram shows a typical crystal configuration
using the two trim capacitors. An important clarification for the
following discussion is that the trim capacitors are in series
with the crystal not parallel. It’s a common misconception that
load capacitors are in parallel with the crystal and should be
approximately equal to the load capacitance of the crystal.
This is not true.
XTAL
Ce1
Ce2
Trim
33pF
Figure 2. Crystal Loading Example
Use the following formulas to calculate the trim capacitor
values for Ce1 and Ce2.
Load Capacitance (each side)
Ce = 2 * CL – (Cs + Ci)
Total Capacitance (as seen by the crystal)
CLe
Figure 1. Crystal Capacitive Clarification
Calculating Load Capacitors
In addition to the standard external trim capacitors, trace
capacitance and pin capacitance must also be considered to
correctly calculate crystal loading. As mentioned previously,
the capacitance on each side of the crystal is in series with the
crystal. This means the total capacitance on each side of the
crystal must be twice the specified crystal load capacitance
(CL). While the capacitance on each side of the crystal is in
series with the crystal, trim capacitors (Ce1,Ce2) should be
calculated to provide equal capacitive loading on both sides.
=
1
1
( Ce1 + Cs1
+ Ci1 +
1
Ce2 + Cs2 + Ci2
)
CL....................................................Crystal load capacitance
CLe......................................... Actual loading seen by crystal
using standard value trim capacitors
Ce..................................................... External trim capacitors
Cs .............................................. Stray capacitance (terraced)
Ci ...........................................................Internal capacitance
(lead frame, bond wires etc.)
CLK_REQ[0:1]# Description
The CLKREQ#[A:B] signals are active LOW inputs used for
clean enabling and disabling selected SRC outputs. The
outputs controlled by CLKREQ#[A:B] are determined by the
settings in register byte 8. The CLKREQ# signal is a
de-bounced signal in that its state must remain unchanged
during two consecutive rising edges of SRCC to be recognized
as a valid assertion or deassertion. (The assertion and
deassertion of this signal is absolutely asynchronous.)
CLK_REQ[A:B]# Assertion (CLKREQ# -> LOW)
All differential outputs that were stopped are to resume normal
operation in a glitch-free manner. The maximum latency from
the assertion to active outputs is between 2–6 SRC clock
periods (2 clocks are shown) with all SRC outputs resuming
Rev 1.0, November 20, 2006
Page 11 of 23
CY28443-3
simultaneously. All stopped SRC outputs must be driven HIGH
within 10 ns of CLKREQ#[1:0] deassertion to a voltage greater
than 200 mV.
CLK_REQ[A:B]# Deassertion (CLKREQ# -> HIGH)
The impact of deasserting the CLKREQ#[A:B] pins is all SRC
outputs that are set in the control registers to stoppable via
deassertion of CLKREQ#[A:B] are to be stopped after their
next transition. The final state of all stopped DIF signals is
LOW, both SRCT clock and SRCC clock outputs will not be
driven.
PD (Power-down) Clarification
The VTT_PWRGD# /PD pin is a dual-function pin. During
initial power-up, the pin functions as VTT_PWRGD#. Once
VTT_PWRGD# has been sampled LOW by the clock chip, the
pin assumes PD functionality. The PD pin is an asynchronous
active HIGH input used to shut off all clocks cleanly prior to
shutting off power to the device. This signal is synchronized
internal to the device prior to powering down the clock synthesizer. PD is also an asynchronous input for powering up the
system. When PD is asserted HIGH, all clocks need to be
driven to a low value and held prior to turning off the VCOs and
the crystal oscillator.
PD (Power-down) Assertion
When PD is sampled HIGH by two consecutive rising edges
of CPUC, all single-ended outputs will be held LOW on their
next HIGH-to-LOW transition and differential clocks must held
high or tri-stated (depending on the state of the control register
drive mode bit) on the next diff clock# HIGH-to-LOW transition
within 4 clock periods. When the SMBus PD drive mode bit
corresponding to the differential (CPU, SRC, and DOT) clock
output of interest is programmed to ‘0’, the clock outputs are
held with the “Diff clock” pin driven HIGH at 2 x Iref, and “Diff
clock#” tri-state. If the control register PD drive mode bit corresponding to the output of interest is programmed to “1”, then
both the “Diff clock” and the “Diff clock#” are tri-state. Note the
example in Figure 4 shows CPUT = 133 MHz and PD drive
mode = ‘1’ for all differential outputs. This diagram and
description is applicable to valid CPU frequencies 100, 133,
166, and 200 MHz. In the event that PD mode is desired as
the initial power-on state, PD must be asserted HIGH in less
than 10 Ps after asserting Vtt_PwrGd#. It should be noted that
96_100_SSC will follow the DOT waveform is selected for
96 MHz and the SRC waveform when in 100-MHz mode.
PD Deassertion
The power-up latency is less than 1.8 ms. This is the time from
the deassertion of the PD pin or the ramping of the power
supply until the time that stable clocks are output from the
clock chip. All differential outputs stopped in a three-state
condition resulting from power down will be driven high in less
than 300 Ps of PD deassertion to a voltage greater than
200 mV. After the clock chip’s internal PLL is powered up and
locked, all outputs will be enabled within a few clock cycles of
each other. Figure 5 is an example showing the relationship of
clocks coming up. It should be noted that 96_100_SSC will
follow the DOT waveform is selected for 96 MHz and the SRC
waveform when in 100-MHz mode.
CLKREQ#X
SRCT(free running)
SRCC(free running)
SRCT(stoppable)
SRCT(stoppable)
Figure 3. CLK_REQ#[A:B] Deassertion/Assertion Waveform
Tstable
<1.8 ms
PD
CPUT, 133MHz
CPUC, 133MHz
SRCT 100MHz
SRCC 100MHz
USB, 48MHz
DOT96T
DOT96C
PCI, 33MHz
REF
Tdrive_PWRDN#
<300 Ps, > 200 mV
Figure 5. Power-down Deassertion Timing Waveform
Rev 1.0, November 20, 2006
Page 12 of 23
CY28443-3
PD
CPUT, 133MHz
CPUC, 133MHz
SRCT 100MHz
SRCC 100MHz
USB, 48MHz
DOT96T
DOT96C
PCI, 33 MHz
REF
Figure 4. Power-down Assertion Timing Waveform
CPU_STP# Assertion
The CPU_STP# signal is an active LOW input used for
synchronous stopping and starting the CPU output clocks
while the rest of the clock generator continues to function.
When the CPU_STP# pin is asserted, all CPU outputs that are
set with the SMBus configuration to be stoppable via assertion
of CPU_STP# will be stopped within two–six CPU clock
periods after being sampled by two rising edges of the internal
CPUC clock. The final states of the stopped CPU signals are
CPUT = HIGH and CPUC = LOW. There is no change to the
output drive current values during the stopped state. The
CPUT is driven HIGH with a current value equal to 6 x (Iref),
and the CPUC signal will be tri-stated.
CPU_STP# Deassertion
The deassertion of the CPU_STP# signal will cause all CPU
outputs that were stopped to resume normal operation in a
synchronous manner. Synchronous manner meaning that no
short or stretched clock pulses will be produce when the clock
resumes. The maximum latency from the deassertion to active
outputs is no more than two CPU clock cycles.
CPU_STP#
CPUT
CPUC
Figure 6. CPU_STP# Assertion Waveform
CPU_STP#
CPUT
CPUC
CPUT Internal
CPUC Internal
Tdrive_CPU_STP#, 10 ns > 200 mV
Figure 7. CPU_STP# Deassertion Waveform
Rev 1.0, November 20, 2006
Page 13 of 23
CY28443-3
1.8 ms
CPU_STOP#
PD
CPUT(Free Running
CPUC(Free Running
CPUT(Stoppable)
CPUC(Stoppable)
DOT96T
DOT96C
Figure 8. CPU_STP#= Driven, CPU_PD = Driven, DOT_PD = Driven
1.8 ms
CPU_STOP#
PD
CPUT(Free Running)
CPUC(Free Running)
CPUT(Stoppable)
CPUC(Stoppable)
DOT96T
DOT96C
Figure 9. CPU_STP# = Tri-state, CPU_PD = Tri-state, DOT_PD = Tri-state
PCI_STP# Assertion
PCI_STP# Deassertion
The PCI_STP# signal is an active LOW input used for
synchronous stopping and starting the PCI outputs while the
rest of the clock generator continues to function. The set-up
time for capturing PCI_STP# going LOW is 10 ns (tSU). (See
Figure 10.) The PCIF clocks will not be affected by this pin if
their corresponding control bit in the SMBus register is set to
allow them to be free running.
The deassertion of the PCI_STP# signal will cause all PCI and
stoppable PCIF clocks to resume running in a synchronous
manner within two PCI clock periods after PCI_STP# transitions to a high level.
Tsu
PCI_STP#
PCI_F
PCI
SRC 100MHz
Figure 10. PCI_STP# Assertion Waveform
Rev 1.0, November 20, 2006
Page 14 of 23
CY28443-3
Tdrive_SRC
Tsu
PCI_STP#
PCI_F
PCI
SRC 100MHz
Figure 11. PCI_STP# Deassertion Waveform
FS_A, FS_B,FS_C
VTT_PWRGD#
PWRGD_VRM
0.2-0.3 ms
Delay
VDD Clock Gen
Clock State
State 0
Wait for
VTT_PWRGD#
State 1
State 2
Off
Clock Outputs
State 3
On
On
Off
Clock VCO
Device is not affected,
VTT_PWRGD# is ignored
Sample Sels
Figure 12. VTT_PWRGD# Timing Diagram
S2
S1
VTT_PWRGD# = Low
Delay >0.25 ms
Sample
Inputs straps
VDD_A = 2.0V
Wait for <1.8 ms
S0
Power Off
S3
VDD_A = off
Normal
Operation
Enable Outputs
VTT_PWRGD# = toggle
Figure 13. Clock Generator Power-up/Run State Diagram
Rev 1.0, November 20, 2006
Page 15 of 23
CY28443-3
Absolute Maximum Conditions
Parameter
Description
Condition
Min.
Max.
Unit
VDD
Core Supply Voltage
–0.5
4.6
V
VDD_A
Analog Supply Voltage
–0.5
4.6
V
VIN
Input Voltage
Relative to VSS
–0.5
VDD + 0.5
VDC
TS
Temperature, Storage
Non-functional
–65
150
°C
TA
Temperature, Operating Ambient
Functional
0
85
°C
TJ
Temperature, Junction
Functional
–
150
°C
ØJC
Dissipation, Junction to Case
Mil-STD-883E Method 1012.1
–
20
°C/W
ØJA
Dissipation, Junction to Ambient
JEDEC (JESD 51)
–
60
°C/W
–
V
ESDHBM
ESD Protection (Human Body Model)
MIL-STD-883, Method 3015
UL-94
Flammability Rating
At 1/8 in.
MSL
Moisture Sensitivity Level
2000
V–0
1
Multiple Supplies: The Voltage on any input or I/O pin cannot exceed the power pin during power-up. Power supply sequencing is NOT required.
DC Electrical Specifications
Parameter
Description
Condition
All VDDs
3.3V Operating Voltage
3.3 ± 5%
VILI2C
Input Low Voltage
SDATA, SCLK
VIHI2C
Input High Voltage
SDATA, SCLK
VIL_FS
FS_[A,B] Input Low Voltage
VIH_FS
FS_[A,B] Input High Voltage
VILFS_C
FS_C Input Low Voltage
Min.
Max.
Unit
3.135
3.465
V
–
1.0
V
2.2
–
V
VSS – 0.3
0.35
V
0.7
VDD + 0.5
V
VSS – 0.3
0.35
V
VIMFS_C
FS_C Input Middle Voltage
Typical
0.9
1.7
V
VIHFS_C
FS_C Input High Voltage
Typical
2.3
VDD + 0.5
V
VIL
3.3V Input Low Voltage
VSS – 0.3
0.8
V
VIH
3.3V Input High Voltage
2.0
VDD + 0.3
V
IIL
Input Low Leakage Current
Except internal pull-up resistors, 0 < VIN < VDD
–5
5
PA
IIH
Input High Leakage Current
Except internal pull-down resistors, 0 < VIN < VDD
–
5
PA
VOL
3.3V Output Low Voltage
IOL = 1 mA
VOH
3.3V Output High Voltage
IOH = –1 mA
IOZ
High-impedance Output
Current
–
0.4
V
2.4
–
V
–10
10
PA
CIN
Input Pin Capacitance
3
5
pF
COUT
Output Pin Capacitance
3
6
pF
LIN
Pin Inductance
VXIH
Xin High Voltage
VXIL
Xin Low Voltage
IDD3.3V
Dynamic Supply Current
At max load in low drive mode per Figure 14
@133 MHz
IPD3.3V
Power-down Supply Current
IPD3.3V
Power-down Supply Current
Rev 1.0, November 20, 2006
–
7
nH
0.7VDD
VDD
V
0
0.3VDD
V
–
300
mA
PD asserted, Outputs Driven
–
70
mA
PD asserted, Outputs Tri-state
–
5
mA
Page 16 of 23
CY28443-3
AC Electrical Specifications
Parameter
Description
Condition
Min.
Max.
Unit
47.5
52.5
%
69.841
71.0
ns
ns
Crystal
TDC
XIN Duty Cycle
The device will operate reliably with input
duty cycles up to 30/70 but the REF clock
duty cycle will not be within specification
TPERIOD
XIN Period
When XIN is driven from an external
clock source
T R / TF
XIN Rise and Fall Times
Measured between 0.3VDD and 0.7VDD
–
10.0
TCCJ
XIN Cycle to Cycle Jitter
As an average over 1-Ps duration
–
500
ps
LACC
Long-term Accuracy
Measured at crossing point VOX
–
300
ppm
TDC
CPUT and CPUC Duty Cycle
Measured at crossing point VOX
45
55
%
CPU at 0.7V
TPERIOD
100-MHz CPUT and CPUC Period
Measured at crossing point VOX
9.997001
10.00300
ns
TPERIOD
133-MHz CPUT and CPUC Period
Measured at crossing point VOX
7.497751
7.502251
ns
TPERIOD
166-MHz CPUT and CPUC Period
Measured at crossing point VOX
5.998201
6.001801
ns
TPERIOD
200-MHz CPUT and CPUC Period
Measured at crossing point VOX
4.998500
5.001500
ns
TPERIODSS
100-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
9.997001
10.05327
ns
TPERIODSS
133-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
7.497751
7.539950
ns
TPERIODSS
166-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
5.998201
6.031960
ns
TPERIODSS
200-MHz CPUT and CPUC Period, SSC Measured at crossing point VOX
4.998500
5.026634
ns
TPERIODAbs
100-MHz CPUT and CPUC Absolute
period
Measured at crossing point VOX
9.912001
10.08800
ns
TPERIODAbs
133-MHz CPUT and CPUC Absolute
period
Measured at crossing point VOX
7.412751
7.587251
ns
TPERIODAbs
166-MHz CPUT and CPUC Absolute
period
Measured at crossing point VOX
5.913201
6.086801
ns
TPERIODAbs
200-MHz CPUT and CPUC Absolute
period
Measured at crossing point VOX
4.913500
5.086500
ns
TPERIODSSAbs 100-MHz CPUT and CPUC Absolute
period, SSC
Measured at crossing point VOX
9.912001
10.13827
ns
TPERIODSSAbs 133-MHz CPUT and CPUC Absolute
period, SSC
Measured at crossing point VOX
7.412751
7.624950
ns
TPERIODSSAbs 166-MHz CPUT and CPUC Absolute
period, SSC
Measured at crossing point VOX
5.913201
6.116960
ns
TPERIODSSAbs 200-MHz CPUT and CPUC Absolute
period, SSC
Measured at crossing point VOX
4.913500
5.111634
ns
TCCJ
CPUT/C Cycle to Cycle Jitter
Measured at crossing point VOX
–
85 [1]
ps
TCCJ2
CPU2_ITP Cycle to Cycle Jitter
Measured at crossing point VOX
–
125 [1]
ps
LACC
Long-term Accuracy
Measured at crossing point VOX
–
300
ppm
TSKEW
CPU1 to CPU0 Clock Skew
Measured at crossing point VOX
–
100
ps
TSKEW2
CPU2_ITP to CPU0 Clock Skew
Measured at crossing point VOX
T R / TF
CPUT and CPUC Rise and Fall Time
Measured from VOL = 0.175 to
VOH = 0.525V
TRFM
Rise/Fall Matching
Determined as a fraction of
2*(TR – TF)/(TR + TF)
'TR
Rise Time Variation
'TF
Fall Time Variation
VHIGH
Voltage High
Math averages Figure 16
VLOW
Voltage Low
Math averages Figure 16
–150
Rev 1.0, November 20, 2006
–
150
ps
175
700
ps
–
20
%
–
125
ps
–
125
ps
660
850
mV
–
mV
Page 17 of 23
CY28443-3
AC Electrical Specifications (continued)
Parameter
Description
Condition
Min.
Max.
Unit
250
550
mV
–
VHIGH +
0.3
V
–0.3
–
V
–
0.2
V
Measured at crossing point VOX
45
55
%
VOX
Crossing Point Voltage at 0.7V Swing
VOVS
Maximum Overshoot Voltage
VUDS
Minimum Undershoot Voltage
VRB
Ring Back Voltage
See Figure 16. Measure SE
TDC
SRCT and SRCC Duty Cycle
SRC
TPERIOD
100-MHz SRCT and SRCC Period
Measured at crossing point VOX
9.997001
10.00300
ns
TPERIODSS
100-MHz SRCT and SRCC Period, SSC Measured at crossing point VOX
9.997001
10.05327
ns
TPERIODAbs
100-MHz SRCT and SRCC Absolute
Period
Measured at crossing point VOX
9.872001
10.12800
ns
TPERIODSSAbs 100-MHz SRCT and SRCC Absolute
Period, SSC
Measured at crossing point VOX
9.872001
10.17827
ns
TSKEW
Any SRCT/C to SRCT/C Clock Skew
Measured at crossing point VOX
–
250
ps
TCCJ
SRCT/C Cycle to Cycle Jitter
Measured at crossing point VOX
–
125[1]
ps
LACC
SRCT/C Long Term Accuracy
Measured at crossing point VOX
T R / TF
SRCT and SRCC Rise and Fall Time
Measured from VOL = 0.175 to
VOH = 0.525V
TRFM
Rise/Fall Matching
Determined as a fraction of
2*(TR – TF)/(TR + TF)
'TR
Rise TimeVariation
'TF
Fall Time Variation
VHIGH
Voltage High
Math averages Figure 16
VLOW
Voltage Low
Math averages Figure 16
–150
–
mV
VOX
Crossing Point Voltage at 0.7V Swing
250
550
mV
VOVS
Maximum Overshoot Voltage
–
VHIGH +
0.3
V
VUDS
Minimum Undershoot Voltage
VRB
Ring Back Voltage
–
300
ppm
175
700
ps
–
20
%
–
125
ps
–
125
ps
660
850
mV
–0.3
–
V
See Figure 16. Measure SE
–
0.2
V
96_100_SSC/SRC0 at 0.7V
TDC
SSCT and SSCC Duty Cycle
Measured at crossing point VOX
45
55
%
TPERIOD
100-MHz SSCT and SSCC Period
Measured at crossing point VOX
9.997001
10.00300
ns
TPERIODSS
100-MHz SSCT and SSCC Period, SSC Measured at crossing point VOX
9.997001
10.05327
ns
TPERIODAbs
100-MHz SSCT and SSCC Absolute
Period
Measured at crossing point VOX
9.872001
10.12800
ns
TPERIODSSAbs 100-MHz SRCT and SRCC Absolute
Period, SSC
Measured at crossing point VOX
9.872001
10.17827
ns
TPERIOD
96-MHz SSCT and SSCC Period
Measured at crossing point VOX
10.41354
10.41979
ns
TPERIODSS
96-MHz SSCT and SSCC Period, SSC Measured at crossing point VOX
10.41354
10.47215
ns
TPERIODAbs
96-MHz SSCT and SSCC Absolute
Period
Measured at crossing point VOX
10.16354
10.66979
ns
TPERIODSSAbs 96-MHz SRCT and SRCC Absolute
Period, SSC
Measured at crossing point VOX
10.16354
10.72266
ns
TCCJ
SSCT/C Cycle to Cycle Jitter
Measured at crossing point VOX
–
140
ps
LACC
SSCT/C Long Term Accuracy
Measured at crossing point VOX
–
300
ppm
Note:
1. Measured with one REF on.
Rev 1.0, November 20, 2006
Page 18 of 23
CY28443-3
AC Electrical Specifications (continued)
Parameter
Description
Condition
Min.
Max.
Unit
175
700
ps
–
20
%
–
125
ps
–
125
ps
660
850
mV
T R / TF
SSCT and SSCC Rise and Fall Time
Measured from VOL = 0.175 to
VOH = 0.525V
TRFM
Rise/Fall Matching
Determined as a fraction of
2*(TR – TF)/(TR + TF)
'TR
Rise TimeVariation
'TF
Fall Time Variation
VHIGH
Voltage High
Math averages Figure 16
VLOW
Voltage Low
Math averages Figure 16
–150
–
mV
VOX
Crossing Point Voltage at 0.7V Swing
250
550
mV
VOVS
Maximum Overshoot Voltage
–
VHIGH +
0.3
V
VUDS
Minimum Undershoot Voltage
VRB
Ring Back Voltage
–0.3
–
V
See Figure 16. Measure SE
–
0.2
V
PCI/PCIF at 3.3V
TDC
PCI Duty Cycle
Measurement at 1.5V
45
55
%
TPERIOD
Spread Disabled PCIF/PCI Period
Measurement at 1.5V
29.99100
30.00900
ns
TPERIODSS
Spread Enabled PCIF/PCI Period, SSC Measurement at 1.5V
29.9910
30.15980
ns
TPERIODAbs
Spread Disabled PCIF/PCI Period
Measurement at 1.5V
29.49100
30.50900
ns
TPERIODSSAbs Spread Enabled PCIF/PCI Period, SSC Measurement at 1.5V
29.49100
30.65980
ns
THIGH
PCIF and PCI high time
Measurement at 2.4V
12.0
–
ns
TLOW
PCIF and PCI low time
Measurement at 0.4V
12.0
–
ns
T R / TF
PCIF/PCI rising and falling Edge Rate
Measured between 0.8V and 2.0V
1.0
4.0
V/ns
TSKEW
Any PCI clock to Any PCI clock Skew
Measurement at 1.5V
–
500
ps
ps
TCCJ
PCIF and PCI Cycle to Cycle Jitter
Measurement at 1.5V
–
500[2]
LACC
PCIF/PCI Long Term Accuracy
Measured at crossing point VOX
–
300
ppm
TDC
DOT96T and DOT96C Duty Cycle
Measured at crossing point VOX
45
55
%
DOT96 at 0.7V
TPERIOD
DOT96T and DOT96C Period
Measured at crossing point VOX
10.41354
10.41979
ns
TPERIODAbs
DOT96T and DOT96C Absolute Period Measured at crossing point VOX
10.16354
10.66979
ns
TCCJ
DOT96T/C Cycle to Cycle Jitter
Measured at crossing point VOX
–
250
ps
LACC
DOT96T/C Long Term Accuracy
Measured at crossing point VOX
–
300
ppm
T R / TF
DOT96T and DOT96C Rise and Fall
Time
Measured from VOL = 0.175 to
VOH = 0.525V
175
700
ps
TRFM
Rise/Fall Matching
Determined as a fraction of
2*(TR – TF)/(TR + TF)
–
20
%
'TR
Rise Time Variation
–
125
ps
'TF
Fall Time Variation
–
125
ps
VHIGH
Voltage High
Math averages Figure 16
660
850
mV
VLOW
Voltage Low
Math averages Figure 16
–150
–
mV
VOX
Crossing Point Voltage at 0.7V Swing
250
550
mV
VOVS
Maximum Overshoot Voltage
–
VHIGH +
0.3
V
VUDS
Minimum Undershoot Voltage
–0.3
–
V
VRB
Ring Back Voltage
–
0.2
V
See Figure 16. Measure SE
Note:
2. Measured in Low drive mode.
Rev 1.0, November 20, 2006
Page 19 of 23
CY28443-3
AC Electrical Specifications (continued)
Parameter
Description
Condition
Min.
Max.
Unit
48_M at 3.3V
TDC
Duty Cycle
Measurement at 1.5V
45
55
%
TPERIOD
Period
Measurement at 1.5V
20.83125
20.83542
ns
TPERIODAbs
Absolute Period
Measurement at 1.5V
20.48125
21.18542
ns
THIGH
48_M High time
Measurement at 2.4V
8.094
10.036
ns
TLOW
48_M Low time
Measurement at 0.4V
7.694
9.836
ns
T R / TF
Rising and Falling Edge Rate
Measured between 0.8V and 2.0V
1.0
2.0
V/ns
TCCJ
Cycle to Cycle Jitter
Measurement at 1.5V
–
350
ps
LACC
48M Long Term Accuracy
Measured at crossing point VOX
–
100
ppm
TDC
Duty Cycle
Measurement at 1.5V
45
55
%
TPERIOD
Spread Disabled 27M Period
Measurement at 1.5V
27.000
27.0547
ns
Spread Enabled 27M Period
Measurement at 1.5V
27.000
27.0547
27_M at 3.3V
THIGH
27_M High time
Measurement at 2.0V
10.5
–
ns
TLOW
27_M Low time
Measurement at 0.8V
10.5
–
ns
T R / TF
Rising and Falling Edge Rate
Measured between 0.8V and 2.0V
1.0
4.0
V/ns
TCCJ
Cycle to Cycle Jitter
Measurement at 1.5V
–
500
ps
LACC
27_M Long Term Accuracy
Measured at crossing point VOX
–
50
ppm
REF at 3.3V
TDC
REF Duty Cycle
Measurement at 1.5V
45
55
%
TPERIOD
REF Period
Measurement at 1.5V
69.8203
69.8622
ns
TPERIODAbs
REF Absolute Period
Measurement at 1.5V
68.82033
70.86224
ns
T R / TF
REF Rising and Falling Edge Rate
Measured between 0.8V and 2.0V
1.0
4.0
V/ns
TSKEW
REF Clock to REF Clock
Measurement at 1.5V
–
500
ps
TCCJ
REF Cycle to Cycle Jitter
Measurement at 1.5V
–
1000
ps
LACC
Long Term Accuracy
Measurement at 1.5V
–
300
ppm
–
1.8
ms
10.0
–
ns
ENABLE/DISABLE and SET-UP
TSTABLE
Clock Stabilization from Power-up
TSS
Stopclock Set-up Time
Rev 1.0, November 20, 2006
Page 20 of 23
CY28443-3
Test and Measurement Set-up
For PCI Single-ended Signals and Reference
The following diagram shows test load configurations for the
single-ended PCI, USB, and REF output signals.
Measurement
Point
33:
PCI/
USB
60:
5 pF
Measurement
Point
12:
60:
REF
5 pF
Measurement
Point
12:
60:
5 pF
Figure 14.Single-ended Load Configuration Low Drive Option
M easurem ent
P oint
12:
60:
PCI/
USB
5 pF
M easurem ent
P oint
12:
60:
5 pF
M easurem ent
P oint
12:
60:
R EF
5 pF
M easurem ent
P oint
12:
60:
5 pF
M easurem ent
P oint
12:
60:
5 pF
Figure 15. Single-ended Load Configuration High Drive Option
The following diagram shows the test load configuration for the
differential CPU and SRC outputs.
CPUT
SRCT
D O T96T
96_100_SSC T
CPUC
SRCC
D O T96C
96_100_SSC C
M e a s u re m e n t
P o in t
33:
2 pF
4 9 .9 :
: D if f e r e n t ia l
M e a s u re m e n t
P o in t
33:
4 9 .9 :
2 pF
IR E F
475:
Figure 16. 0.7V Differential Load Configuration
Rev 1.0, November 20, 2006
Page 21 of 23
CY28443-3
3 .3 V s ig n a l s
T DC
-
-
3 .3 V
2 .4 V
1 .5 V
0 .4 V
0V
TF
TR
Figure 17. Single-ended Output Signals (for AC Parameters Measurement)
Ordering Information
Part Number
Package Type
Product Flow
Lead-free
CY28443OXC-3
56-pin SSOP
Commercial, 0q to 85qC
CY28443OXC-3T
56-pin SSOP – Tape and Reel
Commercial, 0q to 85qC
CY28443ZXC-3
56-pin TSSOP
Commercial, 0q to 85qC
CY28443ZXC-3T
56-pin TSSOP – Tape and Reel
Commercial, 0q to 85qC
Rev 1.0, November 20, 2006
Page 22 of 23
CY28443-3
Package Diagrams
56-Lead Thin Shrunk Small Outline Package, Type II (6 mm x 12 mm) Z56
0.249[0.009]
28
1
DIMENSIONS IN MM[INCHES] MIN.
MAX.
REFERENCE JEDEC MO-153
7.950[0.313]
8.255[0.325]
PACKAGE WEIGHT 0.42gms
5.994[0.236]
6.198[0.244]
PART #
Z5624 STANDARD PKG.
ZZ5624 LEAD FREE PKG.
29
56
13.894[0.547]
14.097[0.555]
1.100[0.043]
MAX.
GAUGE PLANE
0.25[0.010]
0.20[0.008]
0.851[0.033]
0.950[0.037]
0.500[0.020]
BSC
0.051[0.002]
0.152[0.006]
0.170[0.006]
0.279[0.011]
0.508[0.020]
0.762[0.030]
0°-8°
0.100[0.003]
0.200[0.008]
SEATING
PLANE
56-Lead Shrunk Small Outline Package O56
.020
1
28
0.395
0.420
0.292
0.299
DIMENSIONS IN INCHES MIN.
MAX.
29
56
0.720
0.730
SEATING PLANE
0.088
0.092
0.095
0.110
0.005
0.010
.010
GAUGE PLANE
0.110
0.025
BSC
0.008
0.0135
0.008
0.016
0°-8°
0.024
0.040
While SLI has reviewed all information herein for accuracy and reliability, Spectra Linear Inc. assumes no responsibility for the use of any circuitry or for the infringement of any patents or other rights of third parties which would result from each use. This product is intended for use in
normal commercial applications and is not warranted nor is it intended for use in life support, critical medical instruments, or any other application requiring extended temperature range, high reliability, or any other extraordinary environmental requirements unless pursuant to additional
processing by Spectra Linear Inc., and expressed written agreement by Spectra Linear Inc. Spectra Linear Inc. reserves the right to change any
circuitry or specification without notice.
Rev 1.0, November 20, 2006
Page 23 of 23