SL28EB717
DOC#: SP-AP-0755 (Rev. AA)
Page 3 of 22
EProClock Programmable Technology
EProClock is the world’s first non-volatile programmable
clock. The EProClock technology allows board designer to
promptly achieve optimum compliance and clock signal
integrity; historically, attainable typically through device and/or
board redesigns.
EProClock technology can be configured through SMBus or
hard coded.
Features:
- > 4000 bits of configurations
- Can be configured through SMBus or hard coded
- Custom frequency sets
- Differential skew control on true or compliment or both
- Differential duty cycle control on true or compliment or both
- Differential amplitude control
- Differential and single-ended slew rate control
- Program Internal or External series resistor on single-ended
clocks
- Program different spread profiles
- Program different spread modulation rate
32
GND_SRC
GND
Ground for SRC clocks
33
VDD_SRC
PWR
3.3V Power supply for SRC clocks
34
VDD_SRC
PWR
3.3V Power supply for SRC clocks
35
SRC6# / CPU2#_ITP
O, DIF Selectable complementary differential CPU or SRC clock output.
ITP_EN = 0 @ CK_PWRGD assertion = SRC6
ITP_EN = 1 @ CK_PWRGD assertion = CPU2
36
SRC6 / CPU2_ITP,
O, DIF Selectable True differential CPU or SRC clock output.
ITP_EN = 0 @ CK_PWRGD assertion = SRC6
ITP_EN = 1 @ CK_PWRGD assertion = CPU2
37
CPU1#
O, DIF Complement differential CPU clock output
38
CPU1
O, DIF True differential CPU clock output
39
VDD_CPU
PWR
3.3V Power supply for CPU clocks
40
CPU0#
O, DIF Complement differential CPU clock output
41
CPU0
O, DIF True differential CPU clock output
42
GND_CPU
GND
Ground for clocks
43
SCLK
I
SMBus compatible SCLOCK
44
SDATA
I/O
SMBus compatible SDATA
45
CPU_STP#*
I, PU
3.3V-tolerant input for stopping CPU outputs (internal 100K-ohm pull-up)
46
PCI/SRC_STP#*
I, PU
3.3V-tolerant input for stopping PCI and SRC outputs (internal 100K-ohm pull-up)
47
XOUT
O
25.00MHz Crystal output, Float XOUT if using only CLKIN (Clock input)
48
XIN / CLKIN
I
25.00MHz Crystal input or 3.3V, 25MHz Clock Input
Pin No.
Name
Type
Description
Frequency Select Pin (FS)
SEL_SATA
FSC
FSB
FSA
CPU
SRC
SATA75/SRC0
PCI
0
100.00
33.33
0
1
100.00
33.33
0
1
0
83.33
100.00
33.33
0
1
83.33
100.00
33.33
0
1
0
133.33
100.00
33.33
0
1
0
1
133.33
100.00
33.33
0
1
0
166.67
100.00
33.33
0
1
166.67
100.00
33.33
1
0
100.00
75.00
33.33
1
0
1
100.00
75.00
33.33