Z8 Encore! XP® F08xA Series
Product Specification
194
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 120. AC Characteristics
VDD = 2.7 to 3.6V
TA = -40°C to +105°C
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
1.0
20.0
MHz System clock frequencies
below the crystal oscillator
minimum require an external
clock driver.
XTAL
F
Internal Precision Oscillator
Frequency
0.032768 5.5296
MHz Oscillator is not adjustable over
the entire range. User may
IPO
select Min or Max value only.
F
F
F
F
Internal Precision Oscillator
Frequency
5.31
4.15
30.7
24
5.75
6.91
33.3
40
MHz High speed with trimming
MHz High speed without trimming
KHz Low speed with trimming
KHz Low speed without trimming
IPO
IPO
IPO
IPO
Internal Precision Oscillator
Frequency
Internal Precision Oscillator
Frequency
Internal Precision Oscillator
Frequency
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
PS024705-0405
P R E L I M I N A R Y
Electrical Characteristics
ZILOG [ ZILOG, INC. ]
