mc68hc912bd32 Freescale Semiconductor, Inc, mc68hc912bd32 Datasheet - Page 274

• Manufacturer Part Number: mc68hc912bd32
• Description: 16-bit Device Composed Of Standard On-chip Peripherals
• Manufacturer: Freescale Semiconductor, Inc

Preliminary Electrical Characteristics
MC68HC912BD32 Rev 1.0
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. Equation still under evaluation
7. 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.
(7)
(7)
(7)
V
delay time
valid time to E rise
hold time
DD
Characteristic
(5)
5.0 Vdc
Table 78 Multiplexed Expansion Bus Timing
(5)
(5)
Freescale Semiconductor, Inc.
(5)
For More Information On This Product,
(5)
5%, V
Preliminary Electrical Characteristics
(1), (2), (3), (4)
t
PW
PW
t
t
t
t
t
t
t
t
t
t
t
t
t
SS
cyc
AD
AV
MAH
DHZ
DSW
RWD
RWV
LSD
LSV
ACCA
ACCE
DBED
DBE
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EL
EH
PW
0 Vdc, T
t
1 f
cyc
PW
t
t
PW
t
PW
cyc
PW
t
AD
cyc
cyc
t
PW
t
o
t
t
cyc
cyc
cyc
EL
cyc
4
EL
EH
4
EH
EL
4
4
EH
4
2
2
20
delay
A
t
t
AD
delay
AD
t
delay
delay
LSD
t
t
t
delay
delay
DBED
delay
RWD
DDW
t
T
DSR
L
t
DSR
to T
H
, unless otherwise noted
Delay
29
18
18
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
21
6
2
2
Symbol
PW
PW
t
t
t
t
t
t
t
t
t
t
t
t
AHDS
t
t
t
ACCA
ACCE
DBED
t
DBEH
t
t
t
DHW
DDW
DSW
RWD
RWV
RWH
t
t
MAH
DSR
DHR
t
DHZ
LSD
LSH
DBE
LSV
cyc
AD
f
AV
o
EH
EL
Min
100
dc
48
48
—
30
—
30
—
20
—
20
—
20
—
—
—
17
0
4
0
1
5
5
0
10 MHz
Max
10.0
54
34
47
43
43
16
18
31
10
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
MHz
Unit
16-elec
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns