Z8F042ASJ020EG2156 Datasheet, PDF (247/280 Pages) Zilog, Inc. – High-Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F082A Series
Product Specification
232
AC Characteristics
The section provides information about the AC characteristics and timing. All AC timing
information assumes a standard load of 50 pF on all outputs.
Table 133. AC Characteristics
Symbol Parameter
F_SYSCLK System Clock Frequency
F_XTAL Crystal Oscillator Frequency
T_XIN
T_XINH
T_XINL
T_XINR
T_XINF
System Clock Period
System Clock High Time
System Clock Low Time
System Clock Rise Time
System Clock Fall Time
V_DD = 2.7 V to 3.6 V
T_A = –40°C to +105°C
(unless otherwise
stated)
Minimum Maximum
–
20.0
0.032768
20.0
–
20.0
50
–
20
30
20
30
–
3
–
3
Units Conditions
MHz Read-only from Flash mem-
ory
MHz Program or erasure of the
Flash memory
MHz
System clock frequencies
below the crystal oscillator
minimum require an exter-
nal clock driver
ns T_CLK = 1/F_sysclk
ns T_CLK = 50 ns
ns T_CLK = 50 ns
ns T_CLK = 50 ns
ns T_CLK = 50 ns
Table 134. Internal Precision Oscillator Electrical Characteristics
Symbol Parameter
F_IPO
Internal Precision Oscillator Fre-
quency (High Speed)
F_IPO
Internal Precision Oscillator Fre-
quency (Low Speed)
F_IPO Internal Precision Oscillator Error
V_DD = 2.7 V to 3.6 V
T_A = –40°C to +105°C
(unless otherwise stated)
Minimum
Typical
5.53
32.7
+1
Maximum Units Conditions
MHz V_DD = 3.3V
T_A = 30°C
kHz V_DD = 3.3V
T_A = 30°C
+4
%
T_IPOST Internal Precision Oscillator
Startup Time
3
µs
PS022828-0413
PRELIMINARY
AC Characteristics