16. Understanding Timing in MAX II
Devices
MII51017-2.1
Introduction
Altera
®
devices provide predictable device performance that is consistent from
simulation to application. Before programming a device, you can determine the
worst-case timing delays for any design. You can approximate propagation delays
with either the Quartus
®
II Timing Analyzer or the timing models given in this
chapter and the timing parameters listed in individual device data sheets.
1
For the most precise timing results, you should use the Quartus II Timing Analyzer,
which accounts for the effects of the secondary factors as mentioned later in this
chapter.
This chapter defines external and internal timing parameters, and illustrates the
timing models for the MAX
®
II device family.
1
Familiarity with device architecture and characteristics is assumed. Refer to specific
device or device family data sheets in this handbook for a complete description of the
architecture, and for the specific values of the timing parameters listed in this chapter.
This chapter contains the following sections:
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External Timing Parameters
External timing parameters represent actual pin-to-pin timing characteristics. Each
external timing parameter consists of a combination of internal timing parameters.
You can find the values of the external timing parameters in the
chapter in the
MAX II Device Handbook.
These external timing
parameters are worst-case values, derived from extensive performance measurements
and ensured by testing. All external timing parameters are shown in bold type.
defines external timing parameters for the MAX II family.
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