Datasheet

Section 26 Electrical Characteristics
Page 1316 of 1408 R01UH0309EJ0500 Rev. 5.00
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
Item Symbol Min. Max. Unit Test Conditions
t
OED2
⎯ 15 ns OE delay time 2*
t
OED2B
⎯ 19 ns
Precharge time 1 t
PCH1
1.0 × t
cyc
−20 ⎯ ns
Precharge time 2 t
PCH2
1.5 × t
cyc
−20 ⎯ ns
Figures 26.8 to
26.23, 26.29, and
26.30
Self-refresh precharge time 1 t
RPS1
2.5 × t
cyc
−20 ⎯ ns
Self-refresh precharge time 2 t
RPS2
3.0 × t
cyc
−20 ⎯ ns
Figures 26.22
and 26.23
WAIT setup time t
WTS
25 ⎯ ns
WAIT hold time t
WTH
1 ⎯ ns
Figures 26.10,
26.16, and 26.35
BREQ setup time t
BREQS
30 ⎯ ns Figure 26.24
BACK delay time t
BACD
⎯ 15 ns
Bus floating time t
BZD
⎯ 40 ns
BREQO delay time t
BRQOD
⎯ 25 ns Figure 26.25
Note: * t
OED1
and t
OED2
.correspond to OE-A and RD, and t
OED1B
and t
OED2B
.correspond to OE-B.
(4) DMAC Timing
Table 26.23 DMAC 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 33 MHz
Item Symbol Min. Max. Unit Test Conditions
DREQ setup time t
DRQS
25 ⎯ ns Figure 26.34
DREQ hold time t
DRQH
10 ⎯
TEND delay time t
TED
⎯ 18 Figure 26.32
DACK delay time 1 t
DACD1
⎯ 18 Figures 26.31 and 26.32
DACK delay time 2 t
DACD2
⎯ 18