Datasheet

Intel
®
E8870 Scalable Node Controller (SNC) Datasheet 9-11
Electrical Specifications
9.8 Miscellaneous Signal Pins
All buffer types that do not belong to one of the major buses in the system are listed as
miscellaneous signals.
9.8.1 Signal Groups
Figure 9-3. TCK and SM_CLK Clock Waveform
T
r
= T58, T74 (Rise Time)
T
f
= T59, T75 (Fall Time)
T
h
= T72 (High Time)
T
l
= T73 (Low Time)
T
p
= T55 (TCK, SM_CLK Period)
V
1
, V
2
: For rise and fall times, TCK and SM_CLK are measured between 20% and 80% points.
Clock
T
h
* V
1
* V
2
T
r
T
p
T
l
T
f
Clock
T
h
* V
1
* V
2
T
r
T
p
T
l
T
f
Table 9-19. Signal Groups
Signal Group Signal
CMOS1.3 Input SP{0/1}PRES
CMOS1.3 I/O SP{0/1}SYNC
CMOS1.5 I/O OD ERR[2:0]#, EV[3:0]#,SP{0/1}GPIO[1:0]
CMOS1.5 O OD INT_OUT#
CMOS1.5 Input
BPIN, CPUPRES#, COMPCNTRL[1:0]#
a
, BUSID[2:0], BINITIN#, BERRIN#,
LVHSTLODTEN, NODEID[4:0], PWRGOOD, RESETI#
b
, RACODTEN[1:0]
c
a. COMPCNTRL[0]: A pull-down (330 ohm) disables the on-die termination on the RESET# and BPM# (debug pins for use by
the in-target probe [ITP]) signals. A pull-up (330 ohm) enables the on-die termination on the RESET# and BPM# (debug pin
for use by the ITP).
COMPCNTRL[1]: A pull-down (330 ohm) enables glitch filter on the system bus STB{P/N}[7:0]#. A pull-up (330 Ohm) dis-
ables the glitch filter on the system bus STB {P/N}[7:0]# signals.
b. Requires external 330 Ohm pull-up resistor.
c. On Die Termination Select:
ODT RACODTEN[0] RACODTEN[1]
OFF 330-ohm to VSS 330-ohm to VSS
100-ohm 330-ohm to VCC 330-ohm to VSS
65-ohm 330-ohm to VCC(1.5V)300-ohm to VCC(1.5V) --> Recommended Value
CMOS1.5 Output RESETO#
CMOS1.8 Output MEMRST[1:0]#
CMOS3.3 Output BERROUT#, BINITOUT#
Analog Input VCC VCCACORE
d
, VSSACORE
d. PLL analog voltage input for core PLL, connect to 1.5V ±5% through a network filter.