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M16C/64C Group
31.3.4
Switching Characteristics (Memory Expansion Mode and Microprocessor
Mode)
(V
= V
= 3 V, V
CC1
CC2
31.3.4.1
In No Wait State Setting
Table 31.55
Memory Expansion and Microprocessor Modes (in No Wait State Setting)
Symbol
t
Address output delay time
d(BCLK-AD)
t
Address output hold time (in relation to BCLK)
h(BCLK-AD)
t
Address output hold time (in relation to RD)
h(RD-AD)
t
Address output hold time (in relation to WR)
h(WR-AD)
t
Chip select output delay time
d(BCLK-CS)
t
Chip select output hold time (in relation to BCLK)
h(BCLK-CS)
t
ALE signal output delay time
d(BCLK-ALE)
t
ALE signal output hold time
h(BCLK-ALE)
t
RD signal output delay time
d(BCLK-RD)
t
RD signal output hold time
h(BCLK-RD)
t
WR signal output delay time
d(BCLK-WR)
t
WR signal output hold time
h(BCLK-WR)
t
Data output delay time (in relation to BCLK)
d(BCLK-DB)
t
Data output delay time (in relation to WR)
d(DB-WR)
t
Data output hold time (in relation to WR)
h(WR-DB)
Notes:
1.
Calculated according to the BCLK frequency as follows:
9
×
0.5 10
[
--------------------- - 40 ns
–
f
(
)
BCLK
2.
Calculated according to the BCLK frequency as follows:
9
×
0.5 10
[
--------------------- - 15 ns
–
f
(
)
BCLK
3.
This standard value shows the timing when the output is off, and
does not show hold time of data bus.
Hold time of data bus varies with capacitor volume and pull-up
(pull-down) resistance value.
Hold time of data bus is expressed in
t = −CR × ln(1 − V
by a circuit of the right figure.
For example, when V
hold time of output low level is
t = −30 pF × 1 kΩ × In(1 − 0.2V
= 6.7 ns.
4.
Calculated according to the BCLK frequency as follows:
9
×
0.5 10
[
--------------------- - 25 ns
–
f
(
)
BCLK
Hold time is equal to or less than 0 ns when the BCLK frequency exceeds 20 MHz.
R01UH0092EJ0110 Rev.1.10
Jul 31, 2012
= -20 ° C to 85 ° C/-40 ° C to 85 ° C unless otherwise specified)
= 0 V, at T
SS
opr
Parameter
]
f
is 12.5 MHz or less.
(BCLK)
]
/V
)
OL
CC2
= 0.2V
, C = 30 pF, R = 1 kΩ,
OL
CC2
/V
)
CC2
CC2
]
Measuring
Condition
See
Figure
31.27
(3)
31. Electrical Characteristics
V
= V
= 3 V
CC1
CC2
Standard
Unit
Min.
Max.
30
ns
0
ns
0
ns
(Note 2)
ns
30
ns
0
ns
25
ns
−4
ns
30
ns
0
ns
30
ns
0
ns
40
ns
(Note 1)
ns
(Note 4)
ns
R
DBi
C
Page 751 of 807
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