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Philips Semiconductors
Important: If the LED D1 is not lit, it indicates that the ISP1561 does not have the V
in the PCI connector). Therefore, your computer will stop responding or 'hang' when the operating system is
loading OHCI or EHCI drivers. Switch JP1 to position 1-2 to connect to the PCI V
normal conditions, except some system power management modes, for example, S3cold and S4).
4.4.
Legacy Support
Fixed I/O 60/64H access is
enabled by the
EmulationEnable (EE) bit
OHCI
Target Access
IOEnb
Config Memory
Access
Memory map
LegacySupport
00H
...
100H
LegacyEnable
104H
108H
10CH
Operational
Registers
MemEnb
RootHub
USB
Keyboard
Figure 4-2 shows the necessary connections for testing the legacy support functionality. The necessary signals must
be accessible on the motherboard used for legacy testing.
Testing
Legacy support
Default setting
(No legacy support)
[1] When testing the legacy support, resistors R22 and R23 (or the pull-down resistors located at the bottom of the evaluation
board) must be removed.
The JP2 connector is used for testing the keyboard and mouse legacy support.
UM10005_3
User's Guide
Fixed I/O 60H
and 64H Access
IO map (60H and 64H)
IRQ1
IRQ12
Legacy Support
SMI#
Emulation Reg
A20OUT
Legacy
KBIRQ1
Emulation
Handler
MUIRQ12
USB
Mouse
Figure 4-2: Block Diagram of Legacy Signal Connection and Testing
R22
[1]
—
0 Ω
Rev. 2.0—April 2003
SMM
System BIOS
P C I
B U S
System Chipset
System Interrupt
System Memory
Controller
Controller
R23
[1]
—
0 Ω
ISP1561 Evaluation Board User's Guide
supply (V
is not supplied
AUX
AUX
= 3.3 V (present under
CC
Fixed I/O 60/64H access can be disabled
or subtractive decode is used
PCI Bridge...
Legacy Mouse and
Keyboard Controller
80c42
System Chipset
Legacy
Legacy
Keyboard
Mouse
R2
10 kΩ
10 kΩ
10 kΩ
10 kΩ
© Koninklijke Philips Electronics N.V. 2003. All rights reserved.
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