Datasheet

Electrical Characteristics
MC9S08GT16A/GT8A Data Sheet, Rev. 1
Freescale Semiconductor 275
A.9.1 ICG Frequency Specifications
Table A-11. ICG Frequency Specifications
(V
DDA
= V
DDA
(min) to V
DDA
(max), Temperature Range = –40 to 125°C Ambient)
Characteristic Symbol Min Typical Max Unit
Oscillator crystal or resonator (REFS = 1)
(Fundamental mode crystal or ceramic resonator)
Low range
High range
High Gain, FBE (HGO=1,CLKS = 10)
High Gain, FEE (HGO=1,CLKS = 11)
Low Power, FBE (HGO=0, CLKS=10)
Low Power, FEE (HGO=0, CLKS=11)
flo
fhi_byp
fhi_eng
flp_byp
flp_eng
32
1
2
1
2
—
—
—
—
—
100
16
10
8
8
kHz
MHz
MHz
MHz
MHz
Input clock frequency (CLKS = 11, REFS = 0)
Low range
High range
f
lo
f
hi_eng
32
2
—
—
100
10
kHz
MHz
Input clock frequency (CLKS = 10, REFS = 0)
f
Extal
0 — 40 MHz
Internal reference frequency (untrimmed)
f
ICGIRCLK
182.25 243 303.75 kHz
Duty cycle of input clock
4
(REFS = 0)
t
dc
40 — 60 %
Output clock ICGOUT frequency
CLKS = 10, REFS = 0
All other cases
f
ICGOUT
f
Extal
(min)
f
lo
(min)
f
Extal
(max)
f
ICGDCLKmax
(max)
MHz
Minimum DCO clock (ICGDCLK) frequency f
ICGDCLKmin
8 — MHz
Maximum DCO clock (ICGDCLK) frequency f
ICGDCLKmax
— 40 MHz
Self-clock mode (ICGOUT) frequency
1
f
Self
f
ICGDCLKmin
f
ICGDCLKmax
MHz
Self-clock mode reset (ICGOUT) frequency f
Self_reset
5.5 8 10.5 MHz
Loss of reference frequency
2
Low range
High range
f
LOR
5
50
25
500
kHz
Loss of DCO frequency
3
f
LOD
0.5 1.5 MHz
Crystal start-up time
4, 5
Low range
High range
t
CSTL
t
CSTH
—
—
430
4
—
—
ms
FLL lock time
4, 6
Low range
High range
t
Lockl
t
Lockh
—
—
5
5
ms
FLL frequency unlock range n
Unlock
–4*N 4*N counts
FLL frequency lock range n
Lock
–2*N 2*N counts
ICGOUT period jitter,
4, 7
measured at f
ICGOUT
Max
Long term jitter (averaged over 2 ms interval)
C
Jitter
— 0.2
% f
ICG
Internal oscillator deviation from trimmed frequency
8
V
DD
= 1.8 – 3.6 V, (constant temperature)
V
DD
= 3.0 V ±10%, –40° C to 125° C
ACC
int
—
—
±0.5
±0.5
±2
±2
%
Oscillator Amplitude (peak-to-peak)
HGO = 0
HGO = 1
V
oscamp
—
—
1
V
DD
—
—
V