mc9s08ac16 Freescale Semiconductor, Inc, mc9s08ac16 Datasheet - Page 314

• Manufacturer Part Number: mc9s08ac16
• Description: Hcs08 Microcontrollers 8-bit Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

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Appendix A Electrical Characteristics and Timing Specifications
314
Num
Typical values are based on characterization data at V
Self-clocked mode frequency is the frequency that the DCO generates when the FLL is open-loop.
Loss of reference frequency is the reference frequency detected internally, which transitions the ICG into self-clocked mode if it
is not in the desired range.
Loss of DCO frequency is the DCO frequency detected internally, which transitions the ICG into FLL bypassed external mode
(if an external reference exists) if it is not in the desired range.
This parameter is characterized before qualification rather than 100% tested.
Proper PC board layout procedures must be followed to achieve specifications.
This specification applies to the period of time required for the FLL to lock after entering FLL engaged internal or external modes.
If a crystal/resonator is being used as the reference, this specification assumes it is already running.
Jitter is the average deviation from the programmed frequency measured over the specified interval at maximum f
Measurements are made with the device powered by filtered supplies and clocked by a stable external clock signal. Noise
injected into the FLL circuitry via V
a given interval.
See
See
10
11
12
13
14
15
16
17
18
9
Figure
Figure
C
A-9.
A-9.
(V
Self-clock mode (ICGOUT) frequency
Self-clock mode reset (ICGOUT) frequency
Loss of reference frequency
Loss of DCO frequency
Crystal start-up time
FLL lock time
FLL frequency unlock range
FLL frequency lock range
ICGOUT period jitter,
MC9S08ACxx: Internal oscillator deviation from
S9S08AWxxA: Internal oscillator deviation from
DDA
Low range
High range
Low range
High range
Low range
High range
Long term jitter (averaged over 2 ms interval)
trimmed frequency
V
V
V
V
trimmed frequency
DD
DD
DD
DD
= V
= 2.7 – 5.5 V, (constant temperature)
= 5.0 V ±10%, –40° C to 125°C
= 2.7 – 5.5 V, (constant temperature)
= 5.0 V ±10%, –40° C to 125°C
DDA
Table A-11. ICG Frequency Specifications (continued)
, 7
(min) to V
Characteristic
DDA
5, 6
9
10
, 8
and V
4
measured at f
MC9S08AC16 Series Data Sheet, Rev. 0
DDA
SSA
3
(max), Temperature Range = –40 to 125°C Ambient)
and variation in crystal oscillator frequency increase the C
DD
PRELIMINARY
2
ICGOUT
= 5.0V, 25°C unless otherwise stated.
Max
f
Symbol
Self_reset
n
ACC
ACC
t
C
t
t
n
t
f
f
CSTH
Unlock
CSTL
Lockh
f
Lockl
LOR
LOD
Self
Lock
Jitter
int
int
f
ICGDCLKmin
–4*N
–2*N
Min
5.5
0.5
50
—
—
—
—
—
—
—
—
—
5
Typ
± 0.5
± 0.5
±0.5
±0.5
430
8
4
Freescale Semiconductor
1
f
ICGDCLKmax
Jitter
Max
10.5
±1.5
±1.5
500
4*N
2*N
1.5
0.2
25
—
—
±2
±2
2
2
percentage for
ICGOUT
counts
counts
% f
MHz
MHz
MHz
Unit
kHz
ms
ms
.
%
%
ICG