Freescale Semiconductor, Inc.
11.9 TIMER MODULE ELECTRICAL SPECIFICATIONS (See notes (a), (b), (c), and (d)
corresponding to part operation, GND = 0 Vdc, TA = 0 to 70°C; see Figures 11-13 and 11-14)
3.3 V
3.3 V or 5.0 V
16.78 MHz
5.0 V
8.39 MHz
25MHz
Num.
Characteristic
CLKOUT Period in Crystal Mode
Clock Rise and Fall Time
Symbol
t
Min
119.2
—
Max
Min
59.6
—
Max
—
Min
Max Unit
1
2
3
—
20
—
40
—
—
5
ns
ns
ns
cyc
t
10
rf
TIN/TGATE High or Low Time, Minimum
Pulse Width
—
—
—
—
—
t
+40
t
+20
—
t +12
cyc
—
cyc
cyc
1
4
Asynchronous Input Setup Time to
CLKOUT Low
15
—
—
—
—
60
8, 5
—
—
—
—
30
5
8
3
8
3
—
—
—
—
20
ns
ns
ns
ns
ns
5
6
7
8
Asynchronous Input Hold Time from
CLKOUT Low
30
10
30
3
15
5
Asynchronous Input Setup Time to
CLKOUT High
Asynchronous Input Hold Time from
CLKOUT High
15
3
CLKOUT High to TOUT Valid
t
TO
NOTES:
(a) The electrical specifications in this document for both the 8.39 and 16.78 MHz @ 3.3 V ±0.3 V are preliminary
and apply only to the appropriate MC68340V low voltage part.
(b) The 16.78-MHz specifications apply to the MC68340 @ 5.0 V ±5% operation.
(c) The 25.16 MHz @ 5.0 V ±5% electrical specifications are preliminary.
(d) For extended temperature parts T = –40 to +85°C. These specifications are preliminary.
A
1. Specification #4 for 16.78 MHz @ 3.3 V ±0.3 V will be 8 ns.
1
CLKOUT
2
2
TIN
TGATE
3
3
Figure 11-13. Timer Module Clock Signal Timing Diagram
11-20
MC68340 USER’S MANUAL
MOTOROLA
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