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376 AMD Geode™ SC2200 Processor Data Book
Electrical Specifications
32580B
9.2 DC Characteristics
Table 9-15 describes the signal buffer types of the SC2200. See Table 3-2 "BGD432 Ball Assignment - Sorted by Ball Num-
ber" on page 29 and Table 3-2 "BGU481 Ball Assignment - Sorted by Ball Number" on page 29 for each signal’s buffer type.
The subsections that follow provide detailed DC characteristics according to buffer type.
Table 9-10. Buffer Types
Symbol Description Reference
Diode Diodes only, no buffer ---
IN
AB
Input, ACCESS.bus compatible with Schmitt Trigger Section 9.2.1
IN
BTN
Input, TTL compatible with Schmitt Trigger, low leakage Section 9.2.2
IN
PCI
Input, PCI compatible Section 9.2.3
IN
STRP
Input, Strap ball (min V
IH
is 0.6V
IO
) with weak pull-down Section 9.2.4
IN
T
Input, TTL compatible Section 9.2.5
IN
TS
Input, TTL compatible with Schmitt Trigger type 200 mV Section 9.2.6
IN
TS1
Input, with Schmitt Trigger type 200 mV Section 9.2.7
IN
USB
Input, USB compatible Section 9.2.8
O
AC97
Output, Totem-Pole, AC97 compatible Section 9.2.9
OD
n
Output, Open-Drain, capable of sinking n mA (Note 1)
Note 1.Output from these signals is open-drain and cannot be forced high.
Section 9.2.10
OD
PCI
Output, Open-Drain, PCI compatible Section 9.2.11
O
p/n
Output, Totem-Pole, capable of sourcing p mA and sinking n mA Section 9.2.12
O
PCI
Output, PCI compatible, TRI-STATE Section 9.2.13
O
USB
Output, USB compatible Section 9.2.14
TS
p/n
Output, TRI-STATE, capable of sourcing p mA and sinking n mA Section 9.2.15
WIRE Wire, no buffer ---