Freescale Semiconductor MC68332 - 16.78 MHz Clock Control Timing

ELECTRICAL CHARACTERISTICS MC68332
A-4 USER’S MANUAL
Table A-4 16.78 MHz Clock Control Timing
(V
DD
and V
DDSYN
= 5.0 Vdc ±10%, V
SS
= 0 Vdc, T
A
= T
L
to T
H,
32.768 kHz reference
)
Num Characteristic Symbol Min Max Unit
1 PLL Reference Frequency Range f
ref
25 50 kHz
2 System Frequency
1
dc 16.78
On-Chip PLL System Frequency f
sys
0.131 16.78 MHz
External Clock Operation dc 16.78
3 PLL Lock Time
2,3,4,5
t
lpll
—20ms
4 VCO Frequency
6
f
VCO
— 2 (f
sys
max) MHz
5 Limp Mode Clock Frequency
SYNCR X bit = 0
SYNCR X bit = 1
f
limp
—
—
f
sys
max /2
f
sys
max
MHz
6 CLKOUT Stability
2,3,4,7
Short term (5 µs interval)
Long term (500 µs interval)
C
stab
–0.5
–0.05
0.5
0.05
%
Fr
ees
cale S
em
iconduct
or
, I
Freescale Semiconductor, Inc.
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