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ELECTRICAL CHARACTERISTICS
M68HC16 Z SERIES
A-6
USER’S MANUAL
Table A-7 Low Voltage Clock Control Timing
(VDD and VDDSYN = 2.7 to 3.6 Vdc, VSS = 0 Vdc, TA = TL to TH)
Num
Characteristic
Symbol
Min
Max
Unit
1
PLL Reference Frequency Range1
MC68CM16Z1
NOTES:
fref
3.2
4.2
MHz
2
PLL Reference Frequency Range1
MC68CK16Z1
MC68CK16Z4
fref
20
50
kHz
3
On-Chip PLL System Frequency
Slow On-Chip PLL System Frequency
Fast On-Chip PLL System Frequency
External Clock Operation
fsys
dc
4 (fref)
4 (fref) /128
dc
16.78
MHz
4
Changing W or Y in SYNCR or exiting from
Cold Start-Up (fast reference option only)5
tlpll
—20
50
75
ms
5
fVCO
—
2 (fsys max)
ms
6
Limp Mode Clock Frequency
SYNCR X bit = 0
SYNCR X bit = 1
f
limp
—
fsys max /2
fsys max
MHz
7
Short term (5
s interval)
Long term (500
s interval)
J
clk
–0.5
–0.05
0.5
0.05
%
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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