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M16C/64C Group
Switching Characteristics
(V
= V CC2 = 5 V, V
CC1
31.2.4.2
In 1 to 3 Waits Setting and When Accessing External Area
Table 31.36
Memory Expansion Mode and Microprocessor Mode (in 1 to 3 Waits Setting and When
Accessing External Area)
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
(
) 10
×
n 0.5
–
----------------------------------- - 40 ns
–
f
(
)
BCLK
2.
Calculated according to the BCLK frequency as follows:
9
×
0.5 10
[
--------------------- - 10 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
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
[
--------------------- - 20 ns
–
f
(
)
BCLK
Hold time is equal to or less than 0 ns when the BCLK frequency exceeds 25 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
n is 1 for 1 wait setting, 2 for 2 waits setting and 3 for 3 waits setting.
[
]
When n = 1, f
]
/V
)
OL
CC2
= 0.2V
, C = 30 pF, R = 1 kΩ, hold
OL
CC2
/V
)
CC2
CC2
]
Measuring
Condition
(3)
is 12.5 MHz or less.
(BCLK)
31. Electrical Characteristics
V
= V
CC1
Standard
Min.
Max.
25
0
0
(Note 2)
25
0
15
See
-4
Figure
25
31.14
0
25
0
40
(Note 1)
(Note 4)
DBi
Page 736 of 807
= 5 V
CC2
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
R
C
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