
Mitsubishi microcomputers
M16C / 61 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Timing (Vcc = 5V)
150
Symbol
Standard
Min.
Measuring condition
Max.
25
Parameter
Unit
t
d(BCLK-AD)
t
h(BCLK-AD)
t
h(RD-AD)
t
h(WR-AD)
Address output delay time
Address output hold time (BCLK standard)
Address output hold time (RD standard)
Address output hold time (WR standard)
ns
ns
ns
ns
4
0
0
t
h(BCLK-CS)
t
d(BCLK-ALE)
t
h(BCLK-ALE)
t
d(BCLK-RD)
t
h(BCLK-RD)
t
d(BCLK-WR)
t
h(BCLK-WR)
t
d(BCLK-DB)
t
h(BCLK-DB)
t
d(DB-WR)
Chip select output hold time (BCLK standard)
ALE signal output delay time
ALE signal output hold time
RD signal output delay time
RD signal output hold time
WR signal output delay time
WR signal output hold time
Data output delay time (BCLK standard)
Data output hold time (BCLK standard)
Data output delay time (WR standard)
4
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
25
– 4
25
0
25
0
40
4
t
h(WR-DB)
Note 1: Calculated according to the BCLK frequency as follows:
10
9
Data output hold time (WR standard)(Note2)
0
ns
(Note1)
td(DB – WR) =
f(BCLK) X 2
– 40
[ns]
t
d(BCLK-CS)
Chip select output delay time
25
ns
Note 2: This is standard value shows the timing when the output is off,
and doesn't show hold time of data bus.
Hold time of data bus is different by capacitor volume and pull-up
(pull-down) resistance value.
Hold time of data bus is expressed in
t = –CR X ln (1 – V
OL
/ V
CC
)
by a circuit of the right figure.
For example, when V
OL
= 0.2V
CC
, C = 30pF, R = 1k
, hold time
of output “L” level is
t = – 30pF X 1k
X ln (1 – 0.2V
CC
/ V
CC
)
= 6.7ns.
DBi
R
C
Switching characteristics (referenced to V
CC
= 5V, V
SS
= 0V at Ta = 25
o
C, CM15 = “1” unless
otherwise specified)
V
CC
= 5V
Figure
1.24.1
Table 1.24.19. Memory expansion mode and microprocessor mode (no wait)