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R01UH0092EJ0110 Rev.1.10
Page 751 of 807
Jul 31, 2012
M16C/64C Group
31. Electrical Characteristics
V
CC1
= V
CC2
= 3 V
31.3.4
Switching Characteristics (Memory Expansion Mode and Microprocessor
Mode)
(V
CC1
= V
CC2
= 3 V, V
SS
= 0 V, at T
opr
= -20
°
C to 85
°
C/-40
°
C to 85
°
C unless otherwise specified)
31.3.4.1
In No Wait State Setting
Notes:
1.
Calculated according to the BCLK frequency as follows:
f
(BCLK)
is 12.5 MHz or less.
2.
Calculated according to the BCLK frequency as follows:
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
OL
/V
CC2
)
by a circuit of the right figure.
For example, when V
OL
= 0.2V
CC2
, C = 30 pF, R = 1 k
Ω
,
hold time of output low level is
t =
−
30 pF × 1 k
Ω
× In(1
−
0.2V
CC2
/V
CC2
)
= 6.7 ns.
4.
Calculated according to the BCLK frequency as follows:
Hold time is equal to or less than 0 ns when the BCLK frequency exceeds 20 MHz.
Table 31.55
Memory Expansion and Microprocessor Modes (in No Wait State Setting)
Symbol
Parameter
Measuring
Condition
Standard
Unit
Min.
Max.
t
d(BCLK-AD)
Address output delay time
See
30
ns
t
h(BCLK-AD)
Address output hold time (in relation to BCLK)
0
ns
t
h(RD-AD)
Address output hold time (in relation to RD)
0
ns
t
h(WR-AD)
Address output hold time (in relation to WR)
ns
t
d(BCLK-CS)
Chip select output delay time
30
ns
t
h(BCLK-CS)
Chip select output hold time (in relation to BCLK)
0
ns
t
d(BCLK-ALE)
ALE signal output delay time
25
ns
t
h(BCLK-ALE)
ALE signal output hold time
−
4
ns
t
d(BCLK-RD)
RD signal output delay time
30
ns
t
h(BCLK-RD)
RD signal output hold time
0
ns
t
d(BCLK-WR)
WR signal output delay time
30
ns
t
h(BCLK-WR)
WR signal output hold time
0
ns
t
d(BCLK-DB)
Data output delay time (in relation to BCLK)
40
ns
t
d(DB-WR)
Data output delay time (in relation to WR)
ns
t
h(WR-DB)
Data output hold time (in relation to WR)
(3)
(Note 4)
ns
0.5
10
9
×
f
BCLK
(
)
----------------------
40
ns
[ ]
–
0.5
10
9
×
f
BCLK
(
)
----------------------
15
ns
[ ]
–
DBi
R
C
0.5
10
9
×
f
BCLK
(
)
----------------------
25
ns
[ ]
–
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