BCM Advanced Research
34
Functional Architecture
Processor Subsystem
The Pentium
II processor connects with the system through a 242-pin connector type socket on the circuit board
labelled SLOT-1. The 242-pin configuration corresponds to a standard pinout that can accommodate the following
processors:
Intel Pentium™ II Processor with MMX (Celeron)
Intel Pentium™ II Processor with MMX (Klamath)
Intel Pentium™ II Processor with MMX (Deschutes)
SLOT-1 Processor Socket Pinout
The 242-pin connector is provided to allow for easy configuration at the time of manufacture or as a field upgrade
of the microprocessor.
Reference:
SLOT-1
Connector Type:
Female, 242 pin Dimm
Connector Part Number:
Molex 71796-0001 (Or equivalent)
Processor Upgrade
The Pentium™ II processor maybe removed and replaced to accommodate Kamath or “Deschutes”. Changes to
the VCORE (Core Voltage Selection) are automatically adjusted.
Processor Heat Sink
The IN440EX M/B provides 12V power for the cooling fan through a 3-pin header with Fan-On control and Fan
Speed detection.
Memory Subsystem
DRAM Subsystem
The IN440EX has two 64-bit (168-pin) DIMM sockets (DIMM0 and DIMM1) allowing system memory from 8
MB to 256MB of main DRAM. There are no jumpers settings required for the memory size, which is
automatically detected by the system BIOS.
The DIMMs are rated 66 MHz (Klamath) or 100 MHz (Deschutes) SDRAM (Synchronous DRAM). DIMM
modules must be ‘Unbuffered’ and operate at 3.3V. All the allowable memory size configurations are described
on table 2.1 (Refer to Table 3.6 in the “Configuration” section for the different combinations and sizes of
DIMMs).
Table 2.2. DRAM memory configurations in
Megabytes.
8
16
24
32
40
48
64
72
80
96
128
136
144
176
192
256
