Appendix A Electrical Characteristics and Timing Specications
MC9S08AC16 Series Data Sheet, Rev. 4
316
Freescale Semiconductor
9
Self-clock mode (ICGOUT) frequency 2
fSelf
fICGDCLKmin
fICGDCLKmax
MHz
10
Self-clock mode reset (ICGOUT) frequency
fSelf_reset
5.5
8
10.5
MHz
11
Loss of reference frequency 3
Low range
High range
fLOR
5
50
25
500
kHz
12
Loss of DCO frequency 4
fLOD
0.5
1.5
MHz
13
Crystal start-up time 5, 6
Low range
High range
t
CSTL
t
CSTH
—
430
4
—
ms
14
Low range
High range
tLockl
tLockh
—
2
ms
15
FLL frequency unlock range
nUnlock
–4*N
4*N
counts
16
FLL frequency lock range
nLock
–2*N
2*N
counts
17
ICGOUT period jitter, , 8 measured at fICGOUT Max Long term jitter (averaged over 2 ms interval)
CJitter
—
0.2
% fICG
18
MC9S08ACxx: Internal oscillator deviation from
trimmed frequency9
VDD = 2.7 – 5.5 V, (constant temperature)
VDD = 5.0 V ±10%, –40° C to 125°C
ACCint
—
±0.5
±2
%
C
S9S08AWxxA: Internal oscillator deviation from
trimmed frequency10
VDD = 2.7 – 5.5 V, (constant temperature)
ACCint
—
±0.5
±1.5
%
PVDD = 5.0 V ±10%, –40° C to 85°C—
±0.5
±1.5
PVDD = 5.0 V ±10%, –40° C to 125°C—
±0.5
±2.0
1 Typical values are based on characterization data at V
DD = 5.0V, 25°C unless otherwise stated.
2 Self-clocked mode frequency is the frequency that the DCO generates when the FLL is open-loop.
3 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.
4 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.
5 This parameter is characterized before qualication rather than 100% tested.
6 Proper PC board layout procedures must be followed to achieve specications.
7 This specication 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 specication assumes it is already running.
8 Jitter is the average deviation from the programmed frequency measured over the specied interval at maximum f
ICGOUT.
Measurements are made with the device powered by ltered supplies and clocked by a stable external clock signal. Noise
injected into the FLL circuitry via VDDA and VSSA and variation in crystal oscillator frequency increase the CJitter percentage for
a given interval.
Table A-11. ICG Frequency Specications (continued)
(VDDA = VDDA (min) to VDDA (max), Temperature Range = –40 to 125°C Ambient)
Num
C
Characteristic
Symbol
Min
Typ1
Max
Unit