Datasheet

Section 26 Electrical Characteristics
Rev.7.00 Mar. 18, 2009 page 1054 of 1136
REJ09B0109-0700
26.3.3 AC Characteristics
The clock, control signal, bus, DMAC, EXDMAC, and on-chip peripheral function timings are
shown below. The measurement conditions of the AC characteristics are shown in figure 26.1.
(1) Clock Timing
Table 26.31 Clock Timing
Conditions: V
CC
= 3.0 V to 3.6 V, AV
CC
= 3.0 V to 3.6 V, V
ref
= 3.0 V to AV
CC
, V
SS
= AV
SS
=
0 V, φ = 8 MHz to 34 MHz, T
a
= −20°C to +75°C (regular specifications),
T
a
= −40°C to +85°C (wide-range specifications)
Item Symbol Min. Max. Unit Test Conditions
Clock cycle time t
cyc
29.4 125 ns Figure 26.2
Clock pulse high width t
CH
9 ⎯ ns Figure 26.2
Clock pulse low width t
CL
9 ⎯ ns
Clock rising time t
Cr
⎯ 5 ns
Clock falling time t
Cf
⎯ 5 ns
Reset oscillation settling time
(crystal)
t
OSC1
10 ⎯ ms Figure 26.4(1)
Software standby oscillation
settling time (crystal)
t
OSC2
10 ⎯ ms Figure 26.4(2)
External clock output delay
settling time
t
DEXT
1 ⎯ ms Figure 26.4(1)
Clock phase difference
*
t
cdif
1/4 × t
cyc
−3 1/4 × t
cyc
+3 ns Figure 26.3
Clock pulse high width
(SDRAMφ)
*
t
SDCH
9 ⎯ ns Figure 26.3
Clock pulse low width
(SDRAMφ)
*
t
SDCL
9 ⎯ ns Figure 26.3
Clock rising time (SDRAMφ)
*
t
sdcr
⎯ 5 ns Figure 26.3
Clock falling time (SDRAMφ)
*
t
sdcf
⎯ 5 ns Figure 26.3
Note: * Supported by the H8S/2378R, H8S/2374R, H8S/2372R, H8S/2371R, and H8S/2370R
only.