Pin Multiplexing, Interrupt Selection, And Base Address Registers; Table 4-2. Pin Multiplexing, Interrupt Selection, And Base Address Registers - AMD Geode SC1200 Data Book

32579B
4.2

Pin Multiplexing, Interrupt Selection, and Base Address Registers

The registers described in Table 4-2 are used to determine
general configuration for the SC1200/SC1201 processor.
These registers also indicate which multiplexed signals are
issued via balls from which more than one signal may be

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

Bit Description
Offset 30h-33h
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 #
D28 / AH3
C28 / AG4
B29 / AJ1
AL16 / V30
28 Test Signals. Selects ball function.
Ball #
AJ4 / E28
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
0 1
1 0
1 1
Ball #
U3 / B18
U1 / A18
V3 / A20
V2 / C19
V1 / C18
W2 / C20
W3 / D20
Y1 / A21
AA1 / C21
T4 / C17
T3 / D17
T1 / B17
AA3 / D21
AB1 / A22
W1 / B20
AB2 / D22
Y3 / B21
AL15 / V31
AJ15 / U29
AK14 / U31
AL14 / U30
26 Note: Reserved: Always write 0.
72
Pin Multiplexing Register - PMR (R/W)
0: Internal Test Signals
Name Add'l Dependencies
PLL2B None
PLL6B None
PLL5B None
GXCLK See PMR[23]
0: AC97 Signal
Name Add'l Dependencies
SIN2 None
Disable all Fast-PCI monitoring signals
Enable all Fast-PCI monitoring signals
Enable Fast-PCI monitoring signals muxed with Parallel Port signals only
Enable all Fast-PCI monitoring signals
FPCI_MON Other Signal
FPCICLK ACK#+TFTDE+VOPCK
F_AD7 PD7+TFTD13
F_AD6 PD6+TFTD1+VOPCK
F_AD5 PD5+TFT11
F_AD4 PD4+TFTD10
F_AD3 PD3+TFTD9
F_AD2 PD2+TFTD8+VOPD7
F_AD1 PD1+TFTD7+VOPD6
F_AD0 PD0_TFTD5+VOPD6
F_C/BE3# SLCT+TFTD15
F_C/BE2# PE+TFTD14
F_C/BE1# BUSY/WAIT#+TFTD3+VOPD2
F_C/BE0# ERR#+TFTD4+VOPD3
F_FRAME# STB#/WRITE#+TFTD7
F_IRDY# SLIN#/ASTRB#+TFTD16
INTR_O AFD#/DSTRB#+TFTD2+VOPD1
SMI_O INIT#+TFTD5+VOPD4
F_DEVSEL# GPIO16+PC_BEEP
F_STOP# AC97_RST#
F_GNT0# SDATA_IN
F_TRDY# BIT_CLK
output. For more information about multiplexed signals and
the appropriate configurations, see Section 3.1 "Ball
Assignments" on page 27.
1: Internal Test Signals
Name
TEST0
TEST1
TEST2
TEST3
1: Internal Test Signal
Name
SDTEST3
Add'l Dependencies
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
See PMR[23]
FPCI_MON = 1 and see PMR[0]
FPCI_MON = 1
FPCI_MON = 1
FPCI_MON = 1
AMD Geode™ SC1200/SC1201 Processor Data Book
General Configuration Block
Reset Value: 00000000h
Add'l Dependencies
None
None
None
PMR[23] = 0
Add'l Dependencies
See Note.