AMD Pwrok Pin, SADDIN10#, SADDOUT10# Pins, Scan Pins, SMI# Pin, STPCLK# Pin, Thermda, Vcca Pin

31994A —1August 2004 AMD Sempron™ Processor Model 10 with 256K L2 Cache Data Sheet

PWROK Pin	The PWROK input to the processor must not be asserted until
	all voltage planes in the system are within specification and all
	system clocks are running within specification.
	For more information, Chapter 8, “Signal and Power-Up
	Requirements” on page 39.
SADDIN[1:0]# and	The AMD Sempron processor model 10 does not support
SADDOUT[1:0]# Pins	SADDIN[1:0]# or SADDOUT[1:0]#. SADDIN[1]# is tied to VCC
	with pullup resistors, if this bit is not supported by the
	Northbridge (future models can support SADDIN[1]#).
	SADDOUT[1:0]# are tied to VCC with pullup resistors if these
	pins are supported by the Northbridge. For more information,
	see the A M D Athlon™ and AMD Duron™ System Bus
	Specification, order# 21902.
Scan Pins	SCANSHIFTEN, SCANCLK1, SCANINTEVAL, and SCANCLK2
	are the scan interface. This interface is AMD internal and is
	tied disabled with pulldown resistors to ground on the
	motherboard.
SMI# Pin	SMI# is an input that causes the processor to enter the system
	management mode.
STPCLK# Pin	STPCLK# is an input that causes the processor to enter a lower
	power mode and issue a Stop Grant special cycle.
SYSCLK and SYSCLK#	SYSCLK and SYSCLK# are differential input clock signals
	provided to the PLL of the processor from a system-clock
	generator.
	See “CLKIN, RSTCLK (SYSCLK) Pins” on page 69 for more
	information.
THERMDA and	Thermal Diode anode and cathode pins are used to monitor the
THERMDC Pins	actual temperature of the processor die, providing more
	accurate temperature control to the system.
	See Table 13, “Thermal Diode Electrical Characteristics,” on
	page 35 for more information.
VCCA Pin	VCCA is the processor PLL supply. For information about the
	VCCA pin, see Table 5, “VCCA AC and DC Characteristics,” on
	page 35 and the AMD Athlon™ Processor-Based Motherboard
	Design Guide, order# 24363.
	To prevent damage to the processor, do not pull this signal High
	above 2.5 V. Do not expose this pin to a differential voltage
	greater than 1.60 V, relative to the processor core voltage.
Chapter 10	Pin Descriptions	73