MC9S08GB60 Datasheet, PDF (271/290 Pages) Motorola, Inc – Microcontrollers

A.8
Internal Clock Generation Module Characteristics
Internal Clock Generation Module Characteristics
ICG
EXTAL
R_F
XTAL
R_S
Crystal or Resonator (See Note)
C₁
C₂
NOTE:
Use fundamental mode crystal or ceramic resonator only.
Table A-8. ICG DC Electrical Specifications (Temperature Range = –40 to 85°C Ambient)
Characteristic
Symbol
Min
Typ¹
Max Unit
Load capacitors
C₁
2
C₂
Feedback resistor
Low range (32k to 100 kHz)
High range (1M – 16 MHz)
R_F
10
MΩ
1
MΩ
Series Resistor
R_S
0
Ω
1 _{Data in Typical column was characterized at 3.0 V, 25°C or is typical recommended value.}
2 _{See crystal or resonator manufacturer’s recommendation.}
A.8.1 ICG Frequency Specifications
Table A-9. ICG Frequency Specifications
(V_DDA = V_DDA (min) to V_DDA (max), Temperature Range = –40 to 85°C Ambient)
Characteristic
Symbol
Min
Typical
Max
Oscillator crystal or resonator (REFS = 1)
(Fundamental mode crystal or ceramic resonator)
Low range
f_lo
32
High range, FLL bypassed external (CLKS = 10)
f_{hi_byp}
2
High range, FLL engaged external (CLKS = 11)
f_{hi_eng}
2
—
100
—
16
—
10
Input clock frequency (CLKS = 11, REFS = 0)
Low range
High range
f_lo
32
f_{hi_eng}
2
—
100
—
10
Input clock frequency (CLKS = 10, REFS = 0)
f_Extal
0
—
40
Internal reference frequency (untrimmed)
f_ICGIRCLK
182.25
243
303.75
Duty cycle of input clock ⁴ (REFS = 0)
t_dc
40
—
60
Unit
kHz
MHz
MHz
kHz
MHz
MHz
kHz
%
MC9S08GB/GT Data Sheet, Rev. 2.3
Freescale Semiconductor
271