Z8F4822AR020SG Datasheet, PDF (236/323 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers

Z8 Encore! XP^® F64xx Series
Product Specification
216
AC Characteristics
This section provides AC characteristics and timing data which assumes a standard load of
50 pF on all outputs. Table 114 lists the Z8 Encore! XP F64xx Series AC characteristics
and timing.
Table 114. AC Characteristics
V_DD = 3.0 V–3.6V
T_A = –40°C to 125°C
Symbol Parameter
Minimum Maximum Units Conditions
F_SYSCLK System Clock Frequency
–
20.0 MHz Read-only from Flash memory.
0.032768 20.0 MHz Program or erasure of Flash
memory.
F_XTAL Crystal Oscillator Frequency 0.032768
20.0
MHz System clock frequencies
below the crystal oscillator mini-
mum require an external clock
driver.
T_XIN
Crystal Oscillator Clock
Period
50
–
ns T_CLK = 1/F_SYSCLK
T_XINH System Clock High Time
20
T_XINL
System Clock Low Time
20
T_XINR System Clock Rise Time
–
ns
ns
3
ns T_CLK = 50 ns. Slower rise times
can be tolerated with longer
clock periods.
T_XINF System Clock Fall Time
–
3
ns T_CLK = 50 ns. Slower fall times
can be tolerated with longer
clock periods.
PS019924-0113
PRELIMINARY
AC Characteristics