XC228X Datasheet, PDF (95/110 Pages) Infineon Technologies AG – 16/32-Bit Single-Chip Microcontroller with 32-Bit Performance

XC2287 / XC2286 / XC2285
XC2000 Family Derivatives
Preliminary
Electrical Parameters
4.4.5 External Bus Timing
The following parameters define the behavior of the XC228x’s bus interface.
Table 20 CLKOUT Reference Signal
Parameter
Symbol
Limits
Unit
Min.
Max.
CLKOUT cycle time
tc₅ CC
40/25/15¹⁾
ns
CLKOUT high time
tc₆ CC 3
–
ns
CLKOUT low time
tc₇ CC 3
–
ns
CLKOUT rise time
tc₈ CC –
3
ns
CLKOUT fall time
tc₉ CC –
3
ns
1) The CLKOUT cycle time is influenced by the PLL jitter (given values apply to f_CPU = 25/40/66 MHz).
For longer periods the relative deviation decreases (see PLL deviation formula).
CLKOUT
t_C5
t_C6
t_C7
t _C9
t_C8
MCT05571
Figure 19 CLKOUT Signal Timing
Note: The term CLKOUT refers to the reference clock output signal which is generated
by selecting f_SYS as source signal for the clock output signal EXTCLK on pin P2.8
and by enabling the high-speed clock driver on this pin.
Data Sheet
93
V0.91, 2007-02
Draft Version