pga370 ETC-unknow, pga370 Datasheet - Page 18

• Manufacturer Part Number: pga370
• Description: Mpu Pentium Iii 64-bit 0.18um 700mhz 370-pin Fcpga
• Manufacturer: ETC-unknow

Pentium
2.3.1
18
Figure 5. Processor V
®
III Processor for the PGA370 Socket at 500 MHz to 1.13 GHz
(1.5 V/1.25 V) are used to provide an AGTL+/AGTL termination voltage to the processor, and the
V
V
On the motherboard, all V
of a power plane that has been divided, or an entire plane). In addition, the motherboard must
implement the V
connected to a system ground plane.
Three additional power related pins exist on a processors utilizing the PGA370 socket. They are
V
The V
platform. A 2.5 V source must be provided to the V
to the V
routes the compatible CMOS voltage source (1.5 V or 2.5 V) through the package and out to the
V
utilize 2.5 V CMOS buffers. Processors based on 0.18 micron technology (e.g., the Pentium III
processor for the PGA370 socket) utilize 1.5 V CMOS buffers. The signal V
by hardware on the motherboard to detect which CMOS voltage the processor requires. A
V
Refer to
Each power signal must meet the specifications stated in
Phase Lock Loop (PLL) Power
It is highly critical that phase lock loop power delivery to the processor meets Intel’s requirements.
A low pass filter is required for power delivery to pins PLL1 and PLL2. This serves as an isolated,
decoupled power source for the internal PLL. Please refer to the Phase Lock Loop Power section in
the appropriate platform design guide for the recommended filter specifications.
REF
TT
CC 1.5
CC CMOS
CORE DET
inputs must be connected to the V
inputs are used as the AGTL+/AGTL reference voltage for the processor. Note that not all
CC CMOS
, V
CC 1.5
Figure
Pentium
Processor
CC 2.5
output pin. Processors based on 0.25 micron technology (e.g., the Celeron processor)
connected to V
Intel
pin. The source for V
CC CMOS
®
pin provides the CMOS voltage for the pull-up resistors required on the system
®
and V
5.
TT
III
pins as a voltage island or large trace. Similarly, all GND pins must be
CC CMOS
2.5V Supply
1.5V Supply
CMOS Signals
Package Routing
CC CORE
SS
within the processor indicates a 1.5 V requirement on V
.
2.5V
1.5V
pins must be connected to a voltage island (an island is a portion
CC 1.5
TT
must be the same as the one supplying V
supply. Refer to
0.1 uF
CC 2.5
Table 7 on page
pin and a 1.5 V source must be provided
Section 5.4
Note: *Ensure this logic is compatible
Pullups
CMOS
with 1.5V signal levels of the
Intel
for the PGA370 socket.
VCC
®
CMOS
Pentium
for more details.
Other Logic
*ICH or
28.
®
CORE DET
III processor
TT
. The processor
CC CMOS
can be used
Datasheet
.