M68HC16 Z SERIES
ELECTRICAL CHARACTERISTICS
USER’S MANUAL
A-25
Table A-18 25.17-MHz AC Timing
(V
DD
and V
DDSYN
= 5.0 Vdc
±
5%, V
SS
= 0 Vdc, T
A
= T
L
to T
H
)
1
Num
Characteristic
Symbol
Min
Max
Unit
F1
Frequency of Operation
f
—
25.166
MHz
1
Clock Period
t
cyc
39.7
—
ns
1A
ECLK Period
t
Ecyc
318
—
ns
1B
External Clock Input Period
2
t
Xcyc
39.7
—
ns
2, 3
Clock Pulse Width
3
t
CW
15
—
ns
2A, 3A ECLK Pulse Width
t
ECW
155
—
ns
2B, 3B External Clock Input High/Low Time
t
XCHL
19.8
—
ns
4, 5
CLKOUT Rise and Fall Time
t
Crf
—
5
ns
4A, 5A Rise and Fall Time (All Outputs except CLKOUT)
t
rf
—
8
ns
4B, 5B External Clock Input Rise and Fall Time
t
XCrf
—
4
ns
6
Clock High to ADDR, FC, SIZ Valid
4
t
CHAV
0
19
ns
7
Clock High to ADDR, Data, FC, SIZ, High Impedance
t
CHAZx
0
39
ns
8
Clock High to ADDR, FC, SIZ, Invalid
t
CHAZn
0
—
ns
9
Clock Low to AS, DS, CS Asserted
4
t
CLSA
2
19
ns
9A
AS to DS or CS Asserted (Read)
5
t
STSA
–10
15
ns
11
ADDR, FC, SIZE Valid to AS, CS, (and DS Read) Asserted
t
AVSA
8
—
ns
12
Clock Low to AS, DS, CS Negated
t
CLSN
2
19
ns
13
AS, DS, CS Negated to ADDR, FC, SIZ Invalid (Address Hold)
t
SNAI
8
—
ns
14
AS, CS (and DS Read) Width Asserted
t
SWA
65
—
ns
14A
DS, CS Width Asserted (Write)
t
SWAW
25
—
ns
14B
AS, CS (and DS Read) Width Asserted (Fast Cycle)
t
SWDW
22
—
ns
15
AS, DS, CS Width Negated
6
t
SN
22
—
ns
16
Clock High to AS, DS, R/W High Impedance
t
CHSZ
—
39
ns
17
AS, DS, CS Negated to R/W High
t
SNRN
10
—
ns
18
Clock High to R/W High
t
CHRH
0
19
ns
20
Clock High to R/W Low
t
CHRL
0
19
ns
21
R/W High to AS, CS Asserted
t
RAAA
10
—
ns
22
R/W Low to DS, CS Asserted (Write)
t
RASA
40
—
ns
23
Clock High to Data Out Valid
t
CHDO
—
19
ns
24
Data Out Valid to Negating Edge of AS, CS (Fast Write Cycle)
t
DVASN
7
—
ns
25
DS, CS Negated to Data Out Invalid (Data Out Hold)
t
SNDOI
5
—
ns
26
Data Out Valid to DS, CS Asserted (Write)
t
DVSA
8
—
ns
27
Data In Valid to Clock Low (Data Setup)
t
DICL
5
—
ns
27A
Late BERR, HALT Asserted to Clock Low (Setup Time)
t
BELCL
10
—
ns
28
AS, DS Negated to DSACK[1:0], BERR, HALT, AVEC Negated
t
SNDN
0
50
ns
29
DS, CS Negated to Data In Invalid (Data In Hold)
7
t
SNDI
0
—
ns
29A
DS, CS Negated to Data In High Impedance
t
SHDI
—
45
ns
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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