R01UH0136EJ0210 Rev.2.10
Page 744 of 800
Jul 31, 2012
M16C/64A Group
31. Electrical Characteristics
V
CC1
= V
CC2
= 3 V
Switching Characteristics
(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)
31.3.4.2
In 1 to 3 Waits Setting and When Accessing External Area
Notes:
1.
Calculated according to the BCLK frequency as follows:
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.
Table 31.56
Memory Expansion Mode and Microprocessor Mode (in 1 to 3 Waits Setting and When
Accessing External Area)
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
h(BCLK-DB)
Data output hold time (in relation to BCLK)
(3)
0
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)
ns
n is 1 for 1 wait setting, 2 for 2 waits setting and 3 for 3 waits setting.
When n = 1, f
(BCLK)
is 12.5 MHz or less.
n
0.5
–
(
)
10
9
×
f
BCLK
(
)
------------------------------------
40
ns
[ ]
–
0.5
10
9
×
f
BCLK
(
)
----------------------
10
ns
[ ]
–
DBi
R
C
Summary of Contents for M16C/60 Series
Page 853: ...M16C 64A Group R01UH0136EJ0210...
