HD64F2168 Datasheet, PDF (828/874 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer

25.3 AC Characteristics
Figure 25.3 shows the test conditions for the AC characteristics.
LSI output pin
C
3V
C = 30pF : All ports
R_L
R_L = 2.4 kΩ
R_H = 12 kΩ
I/O timing test levels
R_H
• Low level : 0.8 V
• High level : 1.5 V
Figure 25.3 Output Load Circuit
25.3.1 Clock Timing
Table 25.4 shows the clock timing. The clock timing specified here covers clock output (φ) and
clock pulse generator (crystal) and external clock input (EXTAL pin) oscillation stabilization
times. For details of external clock input (EXTAL pin and EXCL pin) timing, see table 25.5 and
25.6.
Table 25.4 Clock Timing
Condition: VCC = 3.0 V to 3.6 V, VSS = 0 V, φ = 5 MHz to 33 MHz
Item
Symbol
Clock cycle time
t_cyc
Clock high level pulse
t
CH
width
Clock low level pulse width t
CL
Clock rise time
t
Cr
Clock fall time
t_Cf
Reset oscillation
t_OSC1
stabilization (crystal)
Software standby
t_OSC2
oscillation stabilization time
(crystal)
Min.
30
10
10


10
8
Max.
Unit
200
ns


5
5

ms

Reference
Figure 25.4
Figure 25.5
Figure 25.6
Rev. 3.00, 03/04, page 788 of 830