Intel C2518 FH8065501516710 Data Sheet
Product codes
FH8065501516710
Volume 3—Signal Pin States and Termination—C2000 Product Family
Signal Pin States
Intel
®
Atom™ Processor C2000 Product Family for Microserver
Datasheet, Vol. 3 of 3
September 2014
618
Order Number: 330061-002US
32
Signal Pin States and Termination
This chapter describes the states of each SoC signal during reset sequencing and the
S5 (Soft-Off) power state. It also documents what signals have internal pull-up/pull-
down/series termination resistors and their values.
32.1
Signal Pin States
Table 32-1. Reset State Definitions
Buffer Type
Buffer Description
High-Z
High-impedance state.
For bi-directional signals (designated as I/O), external drivers are not expected.
For bi-directional signals (designated as I/O), external drivers are not expected.
Don’t Care
The state of the input (driven or tri-stated) has no effect. For bi-directional signals
(designated as I/O), it is assumed the output buffer is in a high-impedance state.
V
OH
Output voltage high.
V
OL
Output voltage low.
VOX-known
Output voltage known. The signal voltage level is defined by internal function configuration.
VOX-unknown
Output voltage unknown. The signal voltage level has an indeterminate value.
V
IH
Input voltage high.
V
IL
Input voltage low.
pull-up
This signal is pulled high by a pull-up resistor (internal or external).
pull-down
This signal is pulled low by a pull-down resistor (internal or external).
VIX-unknown
Input voltage unknown. The signal voltage level has an indeterminate value.
Running
The clock or signal is toggling because the function has not stopped.
Off
The power plane for this signal is powered down. Driver and Receiver buffers are turned off.