AMD Sempron™ Processor-In-a-Box 2600+ SDA2600BABOX User Manual

31993A-1 September 2004

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 is an input from the system used for power 
management and clock-forward initialization at reset.

COREFB and COREFB# are outputs to the system that provide 
processor core voltage feedback to the system.

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# are routed to the debug connector. 
DBREQ# is tied to V

CC_CORE

 with a pullup resistor.

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  o f the AMD Athlon™ Processor- Base d 
Motherboard Design Guide, order# 24363.