MC9S08AC128 Datasheet, PDF (25/42 Pages) Freescale Semiconductor, Inc – 8-Bit Microcontroller

Chapter 3 Electrical Characteristics and Timing Specifications
3.9.1 ICG Frequency Specifications
Table 3-11. ICG Frequency Specifications
(V_DDA = V_DDA (min) to V_DDA (max), Temperature Range = –40 to 125°C Ambient)
Num
C
Characteristic
Symbol
Min
Typ¹
Max
Unit
Oscillator crystal or resonator (REFS = 1)
(Fundamental mode crystal or ceramic resonator)
Low range
flo
32
—
100
kHz
1
High range
High Gain, FBE (HGO = 1,CLKS = 10)
fhi_byp
1
—
16
MHz
High Gain, FEE (HGO = 1,CLKS = 11)
fhi_eng
2
—
10
MHz
Low Power, FBE (HGO = 0, CLKS = 10)
flp_byp
1
8
MHz
Low Power, FEE (HGO = 0, CLKS = 11)
flp_eng
2
8
MHz
Input clock frequency (CLKS = 11, REFS = 0)
2
Low range
f_lo
32
—
100
kHz
High range
f_{hi_eng}
2
—
10
MHz
3
Input clock frequency (CLKS = 10, REFS = 0)
f_Extal
0
—
40
MHz
4
Internal reference frequency (untrimmed)
f_ICGIRCLK
182.25
243
303.75
kHz
5
Duty cycle of input clock (REFS = 0)
Output clock ICGOUT frequency
CLKS = 10, REFS = 0
6
All other cases
t_dc
40
—
60
%
f_ICGOUT
f_Extal (min)
f_lo (min)
—
—
f_Extal (max)
f_ICGDCLKmax(
MHz
max)
7
Minimum DCO clock (ICGDCLK) frequency
f_ICGDCLKmin
3
—
MHz
8
Maximum DCO clock (ICGDCLK) frequency
f_ICGDCLKmax
—
40
MHz
9
Self-clock mode (ICGOUT) frequency ²
f_Self
f_ICGDCLKmin
f_ICGDCLKmax MHz
10
Self-clock mode reset (ICGOUT) frequency
f_{Self_reset}
5.5
8
10.5
MHz
Loss of reference frequency ³
11
Low range
High range
f_LOR
5
50
25
500
kHz
12
Loss of DCO frequency ⁴
Crystal start-up time ^{5, 6}
13
Low range
High range
f_LOD
t
CSTL
t
CSTH
0.5
1.5
MHz
—
430
—
—
4
—
ms
FLL lock time ^{, 7}
14
Low range
High range
t_Lockl
t_Lockh
—
—
2
ms
2
15
FLL frequency unlock range
n_Unlock
–4*N
16
FLL frequency lock range
n_Lock
–2*N
17
ICGOUT period jitter, ^{, 8} measured at f_ICGOUT Max
Long term jitter (averaged over 2 ms interval)
C_Jitter
—
Internal oscillator deviation from trimmed
18
frequency⁹
V_DD = 2.7 – 5.5 V, (constant temperature)
V_DD = 5.0 V ±10%, –40° C to 125°C
ACC_int
—
—
± 0.5
±0.5
1 _{Typical values are based on characterization data at VDD = 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.}
4*N
counts
2*N
counts
0.2
% f_ICG
±2
±2
%
MC9S08AC128 MCU Series Data Sheet, Rev. 1
Freescale Semiconductor
25
Preliminary — Subject to Change