Datasheet

Section 31 Electrical Characteristics
Rev. 2.00 Aug. 20, 2008 Page 1125 of 1198
REJ09B0403-0200
31.3 AC Characteristics
Figure 31.3 shows the test conditions for the AC characteristics.
3 V
R
L
I/O timing test levels
• Low level : 0.8 V
• High level : 1.5 V
R
H
C
LSI output pin
C = 30pF : All ports
R
L
= 2.4 kΩ
R
H
= 12 kΩ
Figure 31.3 Output Load Circuit
31.3.1 Clock Timing
Table 31.4 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 31.5 and
31.6.
Table 31.4 Clock Timing
Conditions: VCC = 3.0 V to 3.6 V, VSS = 0 V, φ = 20 MHz to 34 MHz
Item Symbol Min. Max. Unit
Test
Conditions
Clock cycle time t
cyc
29.4 50 ns
Clock high level pulse
width
t
CH
9.7

Clock low level pulse width t
CL
9.7

Clock rise time t
Cr

5
Clock fall time t
Cf

5
Figure 31.4
Reset oscillation
stabilization (crystal)
t
OSC1
10

ms Figure 31.5
Software standby
oscillation stabilization time
(crystal)
t
OSC2
8

Figure 31.6