Intel ® Pentium ® M Processor System Bus Strapping; Resistor Divider Circuit For The Mch's Hxswng And Hyswng; Itp Signal Default Strapping When Itp Debug Port Not Used - Intel Pentium M Processor Design Manual

Figure 33.

Resistor Divider Circuit For The MCH's HXSWNG And HYSWNG

®
5.1.9 Intel
®
The Intel
operation.
1. For the Intel Pentium M processor, a stuffing option should be provided for the TEST[3:1]
pins to allow a 1 kΩ ± 5% pull-down to ground for testing purposes. For proper processor
operation with the E7501 chipset, only the TEST[1] pin resistor should be stuffed, while
the TEST [3:2] resistors should remain unstuffed. Resistors for the stuffing option on these
pins should be placed within 2.0 inches of the Intel Pentium M processor.
2. The Intel Pentium M processor's ITP signals, TDI, TMS, TRST and TCK should assume
default logic values even when the ITP debug port is not used. The TDO signal may be left
open or no connect in this case.
signals. These resistors should be connected to the Intel Pentium M processor within 2.0
inches from their respective pins. It is important to note that
the onboard ITP nor ITP interposer will not be used. (See chapter 10 for more information on
ITP implementation).
Table 29.

ITP Signal Default Strapping When ITP Debug Port Not Used

Signal
TDI
TMS
TRST#
TCK
TDO
Design Guide
®
Intel Pentium
VCCP
301 ±1%
0.01 µF
150 ±1%
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Pentium M Processor System Bus Strapping
®
Pentium M processor has pins that require termination for proper component
Resistor Value
150 Ω ± 5%
39 Ω ± 5%
680 Ω ± 5%
27 Ω ± 5%
Open
®
M Processor and Intel
System Bus Routing Guidelines
VCCP
HXSWNG
HYSWNG
MCH
Table 29 summarizes the default strapping resistors for these
Connect To
VCCP
VCCP
GND
GND
NC
®
E7501 Chipset Platform
301 ±1%
0.01 µF
150 ±1%
Table 29 is applicable only when
Resistor Placement
Within 2.0" of the CPU
Within 2.0" of the CPU
Within 2.0" of the CPU
Within 2.0" of the CPU
N/A
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