
90
PRELIMINARY
Some parametric limits are subject to change.
MITSUBISHI MICROCOMPUTERS
M37754M8C-XXXGP, M37754M8C-XXXHP
M37754S4CGP, M37754S4CHP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timing requirements
(V
CC
= 5 V±10 %, V
SS
= 0 V, T
a
= –20 to 85 °C, f(X
IN
) = 25 MHz when the clock source select bit = “0”
, unless
otherwise noted)
8
The rise and fall time of input signal must be 100 ns or less respectively, unless otherwise noted.
Memory expansion and Microprocessor mode : Low-speed running
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
Unit
t
c
t
w(H)
t
w(L)
t
r
t
f
t
su(DH-RD)
t
su(DL-RD)
t
su(PiD–RD)
t
h(RD-DH)
t
h(RD-DL)
t
h(RD–PiD)
t
su(A–DL/DH)
t
su(CS–DL/DH)
t
su(LA–DL)
Symbol
External clock input cycle time
(Note 1)
External clock input high-level pulse width
(Note 2)
External clock input low-level pulse width
(Note 2)
External clock rise time
External clock fall time
High-order data input setup time (BYTE = “L”)
Low-order data input setup time
Port Pi input setup time (i = 4—9, 11)
High-order data input hold time (BYTE = “L”)
Low-order data input hold time
Port Pi input hold time (i = 4—9, 11)
Data setup time with address stabilized
(Note 3)
Data setup time with chip select stabilized
(Note 3)
Data setup time with address stabilized
(Note 3)
Parameter
Min.
40
t
c
/2 – 8
t
c
/2 – 8
30
30
60
0
0
0
Limits
Max.
8
8
60
(2-
φ
access)
140
(3-
φ
access)
220
(4-
φ
access)
60
(2-
φ
access)
140
(3-
φ
access)
220
(4-
φ
access)
55
(2-
φ
access)
135
(3-
φ
access)
215
(4-
φ
access)
: f(X
IN
) = 12.5 MHz when the clock source selet bit = “1”
Notes 1:
When the clock source select bit = “1”, t
c
’s minimum limit is 80 ns.
2:
When the clock source select bit = “1”, set t
w(H)
/t
c
and t
w(L)
/t
c
ratios to 45 to 55 %.
3:
Since the values depend on external clock input frequency f(X
IN
), calculate them using the bus timing data formula on the page after
the next page.