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Electrical Specifications
9.2
DC Characteristics
Table 9-10 describes the signal buffer types of the SC3200.
(See Table 3-2 "BGD432 Ball Assignment - Sorted by Ball
Number" on page 29 and Table 3-2 "BGU481 Ball Assign-
ment - Sorted by Ball Number" on page 29) for each sig-
nal's buffer type.)
Symbol
Description
Diode
Diodes only, no buffer
IN
Input, ACCESS.bus compatible with Schmitt Trigger
AB
IN
Input, TTL compatible with Schmitt Trigger, low leakage
BTN
IN
Input, PCI compatible
PCI
IN
Input, Strap ball (min V
STRP
IN
Input, TTL compatible
T
IN
Input, TTL compatible with Schmitt Trigger type 200 mV
TS
IN
Input, with Schmitt Trigger type 200 mV
TS1
IN
Input, USB compatible
USB
O
Output, Totem-Pole, AC97 compatible
AC97
OD
Output, Open-Drain, capable of sinking n mA.Note 1
n
OD
Output, Open-Drain, PCI compatible
PCI
O
Output, Totem-Pole, capable of sourcing p mA and sinking n mA
p/n
O
Output, PCI compatible, TRI-STATE
PCI
O
Output, USB compatible
USB
TS
Output, TRI-STATE, capable of sourcing p mA and sinking n mA
p/n
WIRE
Wire, no buffer
Note 1.Output from these signals is open-drain and cannot be forced high.
AMD Geode™ SC3200 Processor Data Book
The subsections that follows provide detailed DC charac-
teristics according to buffer type.
Table 9-10. Buffer Types
is 0.6V
) with weak pull-down
IH
IO
32581C
Reference
---
Section 9.2.1
Section 9.2.2
Section 9.2.3
Section 9.2.4
Section 9.2.5
Section 9.2.6
Section 9.2.7
Section 9.2.8
Section 9.2.9
Section 9.2.10
Section 9.2.11
Section 9.2.12
Section 9.2.13
Section 9.2.14
Section 9.2.15
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357
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