HD64F2145 Datasheet, PDF (727/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Clock Timing: Table 28.5 shows the clock timing. The clock timing specified here covers clock
(ø) output and clock pulse generator (crystal) and external clock input (EXTAL pin) oscillation
settling times. For details on external clock input (EXTAL pin and EXCL pin) timing, see section
25, Clock Pulse Generator.
Table 28.5 Clock Timing
Condition: V_CC = 2.7 V to 3.6 V, V_CCB = 2.7 V to 5.5 V, V_SS = 0 V, ø = 2 MHz to maximum
operating frequency, T_a = –20 to +75°C
Item
Clock cycle time
Clock high pulse width
Clock low pulse width
Clock rise time
Clock fall time
Oscillation settling time at reset (crystal)
Oscillation settling time in software
standby (crystal)
External clock output stabilization delay
time
Symbol
t_cyc
t
CH
t_CL
t_Cr
t_Cf
t_OSC1
t
OSC2
t_DEXT
Condition
10 MHz
Min
Max
100
500
30
—
30
—
—
20
—
20
20
—
8
—
500
—
Unit Reference
ns Figure 28.6
ns Figure 28.6
ns
ns
ns
ms Figure 28.7
ms ^{Figure 28.8}
µs
Rev. 2.0, 08/02, page 687 of 788