XC2385A_14 Datasheet, PDF (116/141 Pages) Infineon Technologies AG – 16/32-Bit Single-Chip Microcontroller

XC2385A, XC2387A
XC2000 Family / Base Line
Electrical Parameters
4.6.5 External Bus Timing
The following parameters specify the behavior of the XC238xA bus interface.
Note: These parameters are not subject to production test but verified by design and/or
characterization.
Note: Operating Conditions apply.
Bus Interface Performance Limits
The output frequency at the bus interface pins is limited by the performance of the output
drivers. The fast clock driver (used for CLKOUT) can drive 80-MHz signals, the standard
drivers can drive 40-MHz signals
Therefore, the speed of the EBC must be limited, either by limiting the system frequency
to f_SYS ≤ 80 MHz or by adding waitstates so that signal transitions have a minimum
distance of 12.5 ns.
For a description of the bus protocol and the programming of its variable timing
parameters, please refer to the User’s Manual.
Table 28 EBC Parameters
Parameter
Symbol
Values
Unit Note /
Min. Typ. Max.
Test Condition
CLKOUT Cycle Time¹⁾
t₅ CC −
1 / f_SYS −
ns
CLKOUT high time
t₆ CC 2
−
−
CLKOUT low time
t₇ CC 2
−
−
CLKOUT rise time
t₈ CC −
−
3
ns
CLKOUT fall time
t₉ CC −
−
3
1) The CLKOUT cycle time is influenced by PLL jitter. For longer periods the relative deviation decreases (see
PLL deviation formula).
CLKOUT
t₅
t₆
t₇
Figure 22
Data Sheet
CLKOUT Signal Timing
116
t₉
t₈
MC_X_ EBCCLKOUT
V2.12, 2014-06