MC912DG128A Motorola, MC912DG128A Datasheet - Page 367

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

17-elec
MOTOROLA
Num
1. All timings are calculated for normal port drives.
2. Crystal input is required to be within 45% to 55% duty.
3. Reduced drive must be off to meet these timings.
4. Unequalled loading of pins will affect relative timing numbers.
5. This characteristic is affected by clock stretch.
6. Without TAG enabled.
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
1
2
3
5
7
8
9
Add N
Frequency of operation (E-clock frequency)
Cycle time
Pulse width, E low
Pulse width, E high
Address delay time
Address valid time to ECLK rise
Multiplexed address hold time
Address Hold to Data Valid
Data Hold to High Z
Read data setup time
Read data hold time
Write data delay time
Write data hold time
Write data setup time
Read/write delay time
Read/write valid time to E rise
Read/write hold time
Low strobe
Low strobe
Low strobe
Address access time
Access time from E rise
DBE delay from ECLK rise
DBE valid time
DBE hold time from ECLK fall
t
cyc
where N = 0, 1, 2, or 3, depending on the number of clock stretches.
(6)
(6)
(6)
V
DD
delay time
valid time to E rise
hold time
Characteristic
5.0 Vdc
(5)
Table 78 Multiplexed Expansion Bus Timing
(5)
(5)
(5)
(5)
10%, V
(1), (2), (3), (4)
SS
Electrical Characteristics
t
ACCA
PW
PW
t
t
t
t
DBED
t
t
t
t
ACCE
DBE
t
t
DSW
0 Vdc, T
DDW
RWD
RWV
RWH
DHW
t
t
MAH
LSD
LSH
t
t
LSV
AD
EH
EL
t
AV
t
cyc
t
DHZ
PW
PW
PW
t
t
t
t
t
t
t
t
t
t
t
PW
cyc
cyc
cyc
cyc
cyc
cyc
PW
cyc
cyc
cyc
cyc
cyc
A
PW
EH
t
EH
EL
AD
t
EH
4
4
4
4
4
4
4
4
2
2
4
cyc
EL
t
T
EL
AD
L
t
delay
delay
delay
delay
delay
delay
delay
delay
delay
delay
delay
to T
DBED
t
t
t
t
DDW
RWD
DSR
t
DSR
1 f
LSD
t
AD
20
H
o
, unless otherwise noted
Delay
14
14
19
26
20
—
—
—
—
—
—
—
—
—
—
—
—
16
11
2
2
6
6
Symbol
PW
PW
t
t
t
t
t
t
t
t
t
t
t
t
t
AHDS
t
t
ACCA
ACCE
DBED
t
DBEH
t
t
t
DDW
DHW
DSW
RWD
RWV
RWH
t
MAH
DHR
t
DHZ
DSR
DBE
t
LSD
LSV
LSH
cyc
AD
f
AV
MC68HC912DT128A Rev 2.0
o
EH
EL
Electrical Characteristics
0.004
0.125
Min
60
60
15
15
38
20
15
10
5
0
5
3
5
9
0
8 MHz
Tables of Data
Max
250
8.0
45
20
45
50
57
26
22
51
10
MHz
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
367
s