Z8F6421PM020SC Datasheet, PDF (244/299 Pages) Zilog, Inc. – High Performance 8-Bit Microcontrollers Z8 Encore-R 64K Series

Z8 Encore!^® 64K Series
Product Specification
224
AC Characteristics
The section provides information on the AC characteristics and timing. All AC timing
information assumes a standard load of 50pF on all outputs. Table 112 lists the 64K Series
AC characteristics and timing.
Table 112. AC Characteristics
Symbol Parameter
F_sysclk System Clock Frequency
F_XTAL Crystal Oscillator Frequency
T_XIN
T_XINH
T_XINL
T_XINR
Crystal Oscillator Clock Period
System Clock High Time
System Clock Low Time
System Clock Rise Time
T_XINF System Clock Fall Time
V_DD = 3.0 - 3.6V
T_A = –40⁰C to 125⁰C
Minimum Maximum Units Conditions
–
20.0 MHz Read-only from Flash memory.
0.032768 20.0
MHz Program or erasure of the Flash
memory.
0.032768 20.0
MHz System clock frequencies below
the crystal oscillator minimum
require an external clock driver.
50
–
ns T_CLK = 1/F_sysclk
20
ns
20
ns
–
3
ns T_CLK = 50ns. Slower rise times
can be tolerated with longer clock
periods.
–
3
ns T_CLK = 50ns. Slower fall times can
be tolerated with longer clock
periods.
PS019915-1005
Electrical Characteristics