Datasheet

Section 26 Electrical Characteristics
Page 1326 of 1408 R01UH0309EJ0500 Rev. 5.00
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
26.3.3 Bus Timing
The bus timings are shown below.
φ
T
1
T
2
A23 to A0
CS7 to CS0
AS
RD
D15 to D0
RD
D15 to D0
HWR, LWR
D15 to D0
Read
(RDNn = 1)
Read
(RDNn = 0)
Write
t
AD
t
CSD1
t
AS1
t
AS1
t
AS1
t
AS1
t
RSD1
t
RSD1
t
AC5
t
AA2
t
RSD1
t
WRD2
t
WSW1
t
WDH1
t
WDD
t
WRD2
t
AH1
t
AC2
t
RDS2
t
AA3
t
RSD2
t
RDS1
t
RDH1
t
AH1
t
ASD
t
ASD
DACK0, DACK1
EDACK2, EDACK3
t
DACD1
t
DACD2
t
EDACD1
t
EDACD2
t
RDH2
Figure 26.8 Basic Bus Timing: Two-State Access