AMD SC2200 manual Ball # Internal Test Signals Name Add’l Dependencies, PMR27, Fpcimon

32580B General Configuration Block

4.2Multiplexing, Interrupt Selection, and Base Address Registers

The registers described inTable 4-2are used to determine general configuration for the SC2200. These registers also indicate which multiplexed signals are issued via balls from

which more than one signal may be output. For more infor- mation about multiplexed signals and the appropriate con- figurations, see Section 3.1 "Ball Assignments" on page 27.

Table 4-2. Multiplexing, Interrupt Selection, and Base Address Registers

Bit	Description
Offset 30h-33h				Pin Multiplexing Register - PMR (R/W)			Reset Value: 00000000h
This register configures pins with multiple functions. See Section 3.1 on page 27 for more information about multiplexing information.
31:30	Reserved: Always write 0.
29	Test Signals. Selects ball functions.
	Ball #		0: Internal Test Signals			1: Internal Test Signals
			Name		Add’l Dependencies	Name	Add’l Dependencies
	D28 / AH3		PLL2B		None	TEST0	None
	C28 / AG4		PLL6B		None	TEST1	None
	B29 / AJ1		PLL5B		None	TEST2	None
	AL16 / V30		GXCLK		See PMR[23]	TEST3	PMR[23] = 0
28	Test Signals. Selects ball function.
	Ball #		0: AC97 Signal			1: Internal Test Signal
			Name		Add’l Dependencies	Name	Add’l Dependencies
	AJ4 / E28		SIN2		None	SDTEST3	See Note.
	Note:	If this bit is set, PMR[8] and PMR[18] must be set by software.
27	FPCI_MON (Fast-PCI Monitoring). Selects Fast-PCI monitoring output signals instead of Parallel Port signals.
	Fast-PCI monitoring output signals can be enabled in two ways: by setting this bit to 1 or by strapping FPCI_MON (ball A4)
	high. (The strapped value can be read back at MCR[30].) Listed below is how these two options work together and the sig-
	nals that are enabled (enabling overrides add’l dependencies except FPCI_MON = 1). Note that the FPCI monitoring signals
	that are muxed with Audio signals are not enabled via this bit. They are only enabled using the strap option.
	PMR[27]		FPCI_MON
		0	0	Disable all Fast-PCI monitoring signals
		0	1	Enable all Fast-PCI monitoring signals
		1	0	Enable Fast-PCI monitoring signals muxed with Parallel Port signals only
		1	1	Enable all Fast-PCI monitoring signals
	Ball #
				FPCI_MON	Other Signal		Add’l Dependencies
	U3 / B18			FPCICLK	ACK#+TFTDE		See PMR[23]
	U1 / A18			F_AD7	PD7+TFTD13		See PMR[23]
	V3 / A20			F_AD6	PD6+TFTD1		See PMR[23]
	V2 / C19			F_AD5	PD5+TFT11		See PMR[23]
	V1 / C18			F_AD4	PD4+TFTD10		See PMR[23]
	W2 / C20			F_AD3	PD3+TFTD9		See PMR[23]
	W3 / D20			F_AD2	PD2+TFTD8		See PMR[23]
	Y1 / A21			F_AD1	PD1+TFTD7		See PMR[23]
	AA1 / C21			F_AD0	PD0_TFTD5		See PMR[23]
	T4 / C17			F_C/BE3#	SLCT+TFTD15		See PMR[23]
	T3 / D17			F_C/BE2#	PE+TFTD14		See PMR[23]
	T1 / B17			F_C/BE1#	BUSY/WAIT#+TFTD3		See PMR[23]
	AA3 / D21			F_C/BE0#	ERR#+TFTD4		See PMR[23]
	AB1 / A22			F_FRAME#	STB#/WRITE#+TFTD7		See PMR[23]
	W1 / B20			F_IRDY#	SLIN#/ASTRB#+TFTD16		See PMR[23]
	AB2 / D22			INTR_O	AFD#/DSTRB#+TFTD2		See PMR[23]
	Y3 / B21			SMI_O	INIT#+TFTD5		See PMR[23]
	AL15 / V31			F_DEVSEL#	GPIO16+PC_BEEP		FPCI_MON = 1 and see PMR[0]
	AJ15 / U29			F_STOP#	AC97_RST#		FPCI_MON = 1
	AK14 / U31			F_GNT0#	SDATA_IN		FPCI_MON = 1
	AL14 / U30			F_TRDY#	BIT_CLK		FPCI_MON = 1
26	Note:	Reserved: Always write 0.
76						AMD Geode™ SC2200 Processor Data Book