AMD SDA3000AI02BA Arkusz Danych Pobierz pdf (Strona 81)

Chapter 10 Pin Descriptions 69

31993A-1 September 2004 AMD Sempron™ Processor Model 10 Data Sheet

AMD Preliminary Information

CLKIN, RSTCLK

(SYSCLK) Pins

Connect CLKIN with RSTCLK and name it SYSCLK. Connect

CLKIN# with RSTCLK# and name it SYSCLK#. Length match

the clocks from the clock generator to the Northbridge and

processor.

See “SYSCLK and SYSCLK#” on page 73 for more information.

CONNECT Pin CONNECT is an input from the system used for power

management and clock-forward initialization at reset.

COREFB and

COREFB# Pins

COREFB and COREFB# are outputs to the system that provide

processor core voltage feedback to the system.

CPU_PRESENCE# Pin CPU_PRESENCE# is connected to VSS on the processor

package. If pulled-up on the motherboard, CPU_PRESENCE#

may be used to detect the presence or absence of a processor in

the Socket A-style socket.

DBRDY and DBREQ#

Pins

DBRDY and DBREQ# are routed to the debug connector.

DBREQ# is tied to V

CC_CORE

with a pullup resistor.

FERR Pin FERR is an output to the system that is asserted for any

unmasked numerical exception independent of the NE bit in

CR0. FERR is a push-pull active High signal that must be

inverted and level shifted to an active Low signal. For more

information about FERR and FERR#, see the “Required

Circuits” chapter of the AMD Athlon™ Processor-Based

Motherboard Design Guide, order# 24363.

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AMD SDA3000AI02BA Arkusz Danych Strona 81