Copyright © Siemens AG 2016. All rights reserved
451
ERTEC 200P-2 Manual
Technical data subject to change
Version
1.0
3.3 IO Timing
General rule:
For IO signals whose timing response is not detailed in the following sections, there are no
specific IO timing requirements. These signals therefore have default constraining, i.e. the
constraining selected achieves IO timing closure but without relaxing IO timing too much.
Definition of time reference:
Figure 45:
Definition of time reference
The constraint specifications correspond to the data sheet values as follows:
Input delay –min X
Input signal hold time => X
Input delay –max X
Input signal setup time => Period - X
Output delay –min X
Output signal hold time => X
Output delay –max X
Clock-to-output time of output signal => Period - X
CLK
DI
DO
set
_output
_delay -mi
/-max
set
_input_delay -
mi
/-
max
ERTEC 200P
Clock with period P
Clock runtime
STA "ext"
STA
STA "int"
STA "ext"
