Intel Celeron Processor for the PGA370 Socket up to 1.40 GHz on 0.13 Micron Process Datasheet
Datasheet 23
Intel
®
Celeron
®
Processor for PGA370 up to 1.40 GHz on 0.13 µ Process
NOTES:
1. See Section 7.0 for information on the these signals.
2. The BR0# pin is the only BREQ# signal that is bidirectional. See Section 7.0 for more information.
3. This signal is 1.25 V.
4. These signals are 1.5 V.
5. This signal is 1.8 V.
6. V
CC
CORE
is the power supply for the processor core and is described in Section 2.6.
VID[3:0,25mV] is described in Section 2.6.
V
TT is used to terminate the system bus and generate V
REF
on the motherboard.
V
SS is system ground.
BSEL[1:0] is described in Section 2.8.2 and Section 7.0.
All other signals are described in Section 7.0.
7. This signal is used to control the value of the processor on-die termination resistance. Refer to the platform
design guide for the recommended pulldown resistor value.
8. These signals are 3.3 V.
9. These signals are 2.0 V.
10. 1.25 V signal for Differential clock application and 2.5 V for Single-ended clock application.
2.8.1 Asynchronous vs. Synchronous for System Bus Signals
All AGTL signals are synchronous to BCLK (BCLK/BCLK#). All of the CMOS, Clock, APIC,
and TAP signals can be applied asynchronously to BCLK (BCLK/BCLK#). All APIC signals are
synchronous to PICCLK. All TAP signals are synchronous to TCK.
Table 4. System Bus Signal Groups
1
Group Name Signals
AGTL Input BPRI#, DEFER#, RESET#, RSP#
AGTL Output PRDY#
AGTL I/O
A[35:3]#, ADS#, AERR#, AP[1:0]#, BERR#, BINIT#, BNR#, BP[3:2]#, BPM[1:0]#,
BR0#
2
, D[63:0]#, DBSY#, DEP[7:0]#, DRDY#, HIT#, HITM#, LOCK#, REQ[4:0]#, RP#,
RS[2:0]#, TRDY#
CMOS Input
(1.25 V)
3
VTT_PWRGD
CMOS Input
(1.5 V)
4
A20M#, FLUSH#, IGNNE#, INIT#, LINT0/INTR, LINT1/NMI, PREQ#, SLP#, SMI#,
STPCLK#
CMOS Input
(1.8 V)
5
PWRGOOD
CMOS Output
(1.5 V)
4
FERR#, IERR#, THERMTRIP#
CMOS Output
8
(3.3 V)
VID[3:0,25mV], BSEL[1:0]
System Bus
Clock
10
(1.25 V/2.5 V)
BCLK0, BCLK0#
APIC Clock
9
PICCLK
APIC I/O
4
PICD[1:0]
TAP Input
4
TCK, TDI, TMS, TRST#
TAP Output
4
TDO
Power/Other
6
CPUPRES#, DYN_OE, NCHTRL, PLL[2:1], SLEWCTRL, RTTCTRL
7
,THERMDN,
THERMDP, V
CC
CORE
, V
REF
, VSS, VTT, Reserved,