MC9S08AW32CFGE Freescale, MC9S08AW32CFGE Datasheet - Page 148
MC9S08AW32CFGE
Manufacturer Part Number
MC9S08AW32CFGE
Description
Manufacturer
Freescale
Datasheet
1.MC9S08AW32CFGE.pdf
(324 pages)
Specifications of MC9S08AW32CFGE
Cpu Family
HCS08
Device Core Size
8b
Frequency (max)
40MHz
Interface Type
I2C/SCI/SPI
Total Internal Ram Size
2KB
# I/os (max)
34
Number Of Timers - General Purpose
8
Operating Supply Voltage (typ)
3.3/5V
Operating Supply Voltage (max)
5.5V
Operating Supply Voltage (min)
2.7V
On-chip Adc
8-chx10-bit
Instruction Set Architecture
CISC
Operating Temp Range
-40C to 85C
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
44
Package Type
LQFP
Program Memory Type
Flash
Program Memory Size
32KB
Lead Free Status / RoHS Status
Compliant
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Chapter 8 Internal Clock Generator (S08ICGV4)
The following sections contain initialization examples for various configurations.
Important configuration information is repeated here for reference.
1
148
1
SCM — self-clocked mode (FLL bypassed
internal)
FBE — FLL bypassed external
FEI — FLL engaged internal
FEE — FLL engaged external
Ensure that
MFD Value
The IRG typically consumes 100 μA. The FLL and DCO typically consumes 0.5 to 2.5 mA, depending upon output frequency.
For minimum power consumption and minimum jitter, choose N and R to be as small as possible.
Bypassed
Engaged
FLL
FLL
000
001
010
011
100
f
ICGDCLK
Clock Scheme
Hexadecimal values designated by a preceding $, binary values designated
by a preceding %, and decimal values have no preceding character.
FEI
4 MHz < f
Medium power (will be less than FEE if oscillator
range = high)
Good clock accuracy (After IRG is trimmed)
Lowest system cost (no external components
required)
IRG is on. DCO is on.
SCM
This mode is mainly provided for quick and reliable
system startup.
3 MHz < f
3 MHz < f
Medium power
Poor accuracy.
IRG is off. DCO is on and open loop.
Multiplication Factor (N)
, which is equal to
Clock Reference Source = Internal
Bus
Bus
Bus
< 20 MHz.
< 5 MHz (default).
< 20 MHz (via filter bits).
Table 8-11. ICGOUT Frequency Calculation Options
10
12
4
6
8
Table 8-10. ICG Configuration Consideration
Table 8-12. MFD and RFD Decode Table
1
f
ICGOUT
MC9S08AW60 Data Sheet, Rev 2
(f
IRG
* R, does not exceed f
f
ext
f
ICGDCLK
/ 7)* 64 * N / R
f
ICGOUT
f
* P * N / R
ext
NOTE
/ R
/ R
1
FEE
4 MHz < f
Medium power (will be less than FEI if oscillator
range = low)
High clock accuracy
Medium/High system cost (crystal, resonator or
external clock source required)
IRG is off. DCO is on.
FBE
f
used.
Lowest power
Highest clock accuracy
Medium/High system cost (Crystal, resonator or
external clock source required)
IRG is off. DCO is off.
RFD
Bus
000
001
010
011
100
Range = 0 ; P = 64
Range = 1; P = 1
ICGDCLKmax
range ≤ 8 MHz when crystal or resonator is
Clock Reference Source = External
Bus
NA
NA
64
P
< 20 MHz
.
Division Factor (R)
Typical f
immediately after reset
Typical f
Freescale Semiconductor
÷16
÷1
÷2
÷4
÷8
ICGOUT
IRG
Note
= 243 kHz
= 8 MHz
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