Electrical Specifications; Power And Ground Pins; Fsb Clock (Bclk[1:0]) And Processor Clocking; Voltage Identification - Intel RH80536GC0332M - Pentium M 1.8 GHz Processor Datasheet

3

Electrical Specifications

3.1

Power and Ground Pins

For clean, on-chip power distribution, the Pentium M processor has a large number of V
and V (ground) inputs. All power pins must be connected to V
SS
must be connected to system ground planes. Use of multiple power and ground planes is
recommended to reduce I*R drop. Please refer to the platform design guides for more details. The
processor V
3.1.1

FSB Clock (BCLK[1:0]) and Processor Clocking

BCLK[1:0] directly controls the system bus interface speed as well as the core frequency of the
processor. As in previous generation processors, the Pentium M processor core frequency is a
multiple of the BCLK[1:0] frequency. In regards to processor clocking, the Pentium M processor
uses a differential clocking implementation.
3.2

Voltage Identification

The Pentium M processor uses six voltage identification pins, VID[5:0], to support automatic
selection of power supply voltages. The VID pins for the Pentium M processor are CMOS outputs
driven by the processor VID circuitry.
state of VID[5:0]. A "1" in this refers to a high-voltage level and a "0" refers to low-voltage level.
Datasheet
pins must be supplied the voltage determined by the VID (Voltage ID) pins.
CC
CC
Table 3-1 specifies the voltage level corresponding to the
Electrical Specifications
(power)
CC
power planes while all V
SS
pins
17