Datasheet

R01DS0063EJ0120 Rev.1.20 Page 74 of 95
Feb 6, 2013
R32C/116 Group 5. Electrical Characteristics
V
CC
=5V
Switching Characteristics (V
CC
= 4.2 to 5.5 V, V
SS
= 0 V, and T
a
=T
opr
, unless otherwise noted)
Note:
1. The value is calculated using the formulas below based on the base clock cycles (t
c(Base)
) and
respective cycles of Tsu(A-R), Tw(R), Tsu(A-W), and Tw(W) set by registers EBC0 to EBC3. If the
calculation results in a negative value, modify the value to be set. For details on how to set values,
refer to the User’s manual.
t
su(S-R)
= t
su(A-R)
= Tsu(A-R) × t
c(Base)
- 15 [ns]
t
w(R)
= Tw(R) × t
c(Base)
- 10 [ns]
t
su(S-W)
= t
su(A-W)
= Tsu(A-W) × t
c(Base)
- 15 [ns]
t
w(W)
= t
su(D-W)
= Tw(W) × t
c(Base)
- 10 [ns]
Table 5.35 External Bus Timing (separate bus)
Symbol Characteristic
Measurement
Condition
Value
Unit
Min. Max.
t
su
(S-R)
Chip-select setup time before
read
Refer to
Figure 5.6
(1)
ns
t
h
(R-S)
Chip-select hold time after read
t
c(Base)
- 15
ns
t
su
(A-R)
Address setup time before read
(1)
ns
t
h
(R-A)
Address hold time after read
t
c(Base)
- 15
ns
t
w
(R)
Read pulse width
(1)
ns
t
su
(S-W)
Chip-select setup time before
write
(1)
ns
t
h
(W-S)
Chip-select hold time after write
1.5 × t
c(Base)
- 15
ns
t
su
(A-W)
Address setup time before write
(1)
ns
t
h
(W-A)
Address hold time after write
1.5 × t
c(Base)
- 15
ns
t
w
(W)
Write pulse width
(1)
ns
t
su
(D-W)
Data setup time before write
(1)
ns
t
h
(W-D)
Data hold time after write
0ns