Z8 Encore! XP® 4K Series
Product Specification
217
AC Characteristics
The section provides information about the AC characteristics and timing. All AC timing
information assumes a standard load of 50pF on all outputs.
Table 132. AC Characteristics
VDD = 2.7 to 3.6V
TA = -40°C to +105°C
(unless otherwise
stated)
Symbol
Parameter
Minimum Maximum Units Conditions
F
System Clock Frequency
–
20.0
20.0
MHz Read-only from Flash memory
SYSCLK
0.032768
MHz Program or erasure of the
Flash memory
F
Crystal Oscillator Frequency
–
20.0
MHz System clock frequencies
below the crystal oscillator
minimum require an external
clock driver.
XTAL
T
T
T
T
T
System Clock Period
50
20
20
–
–
30
30
3
ns
ns
ns
ns
ns
T
T
T
T
T
= 1/F
sysclk
XIN
CLK
CLK
CLK
CLK
CLK
System Clock High Time
System Clock Low Time
System Clock Rise Time
System Clock Fall Time
= 50ns
= 50ns
= 50ns
= 50ns
XINH
XINL
XINR
XINF
–
3
PS022815-0206
Electrical Characteristics
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