12
M68000 USER’S MANUAL ADDENDUM
MOTOROLA
7.0 MC68SEC000 AC ELECTRICAL SPECIFICATIONS — READ AND
WRITE CYCLES
Add the following table and Figures 9 and 10 to Section 10.16.
Applies to 3.3V and 5V.
(GND = 0 V; T
A
= T
L
to T
H
; see Figures 3 and 4)
NUM CHARACTERISTIC
10MHz 16MHz 20MHz
UNIT
MIN MAX MIN MAX MIN MAX
6 Clock Low to Address Valid — 35 — 30 — 25 ns
6A Clock High to FC Valid 0 35 0 30 0 25 ns
7 Clock High to Address, Data Bus High Impedance (Maximum)
(Write)
—55—50—42ns
8 Clock High to Address, FC Invalid (Minimum) 0—0—0—ns
9
1
Clock High to AS
, LDS, UDS Asserted 3 35 3 30 3 25 ns
11
2
Address Valid to AS
, LDS, UDS Asserted (Read)/ AS Asserted
(Write)
20—15—10—ns
11A
2
FC Valid to AS
, LDS, UDS Asserted (Read)/ AS Asserted (Write) 45 — 45 — 40 — ns
12
1
Clock Low to AS
, LDS, UDS Negated 3 35 3 30 3 25 ns
13
2
AS
, LDS, UDS Negated to Address, FC Invalid 15 — 15 — 10 — ns
14
2
AS
(and LDS, UDS Read) Width Asserted 195 — 120 — 100 — ns
14A
2
LDS
, UDS Width Asserted (Write) 95 — 60 — 50 — ns
15
2
AS
, LDS, UDS Width Negated 105 — 60 — 50 — ns
16 Clock High to Control Bus High Impedance — 55 — 50 — 42 ns
17
2
AS
, LDS, UDS Negated to R/W Invalid 15 — 15 — 10 — ns
18
1
Clock High to R/W
High (Read) 0 35 0 30 0 25 ns
20
1
Clock High to R/W
Low (Write) 0 35 0 30 0 25 ns
20A
2,6
AS
Asserted to R/W Low (Write) — 10 — 10 — 10 ns
21
2
Address Valid to R/W
Low (Write) 0—0—0—ns
21A
2
FC Valid to R/W
Low (Write) 50 — 30 — 25 — ns
22
2
R/W
Low to DS Asserted (Write) 50 — 30 — 25 — ns
23 Clock Low to Data-Out Valid (Write) — 35 — 30 — 25 ns
25
2
AS
, LDS, UDS Negated to Data-Out Invalid (Write) 30 — 15 — 10 — ns
26
2
Data-Out Valid to LDS
, UDS Asserted (Write) 30 — 15 — 10 — ns
27
5
Data-In Valid to Clock Low (Setup Time on Read) 5—5—5—ns
28
2
AS
, LDS, UDS Negated to DTACK Negated (Asynchronous Hold) 0 110 0 110 0 95 ns
28A Clock High to DTACK
Negated 0 110 0 110 0 95 ns
Frees
cale Semiconductor,
I
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
nc...
