DEMO9S08EL32 Freescale Semiconductor, DEMO9S08EL32 Datasheet - Page 118

• Manufacturer Part Number: DEMO9S08EL32
• Description: BOARD DEMO FOR 9S08 EL MCU
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of DEMO9S08EL32

• Contents: Evaluation Board
• Processor To Be Evaluated: MC9S08EL32
• Data Bus Width: 8 bit
• Interface Type: RS-232, USB
• Operating Supply Voltage: 12 V
• Silicon Manufacturer: Freescale
• Core Architecture: HCS08
• Core Sub-architecture: HCS08
• Silicon Core Number: MC9S08
• Silicon Family Name: S08EL
• Rohs Compliant: Yes
• For Use With/related Products: MC9S08EL32
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Internal Clock Source (S08ICSV2)
8.1.4
There are seven modes of operation for the ICS: FEI, FEE, FBI, FBILP, FBE, FBELP, and stop.
8.1.4.1
In FLL engaged internal mode, which is the default mode, the ICS supplies a clock derived from the FLL
which is controlled by the internal reference clock. The BDC clock is supplied from the FLL.
8.1.4.2
In FLL engaged external mode, the ICS supplies a clock derived from the FLL which is controlled by an
external reference clock. The BDC clock is supplied from the FLL.
8.1.4.3
In FLL bypassed internal mode, the FLL is enabled and controlled by the internal reference clock, but is
bypassed. The ICS supplies a clock derived from the internal reference clock. The BDC clock is supplied
from the FLL.
118
Modes of Operation
FLL Engaged Interna
FLL Engaged External
FLL Bypassed Interna
RANGE
HGO
IREFS
MC9S08EL32 Series and MC9S08SL16 Series Data Sheet, Rev. 3
External Reference
Figure 8-2. Internal Clock Source (ICS) Block Diagram
Clock Source
n=0-7
RDIV
Optional
/ 2
Block
n
IREFSTEN
EREFSTEN
Reference
Internal
RDIV_CLK
TRIM
Clock
EREFS
l (FEI)
9
l (FBI)
(FEE)
Filter
DCO
LP
FLL
ERCLKEN
IRCLKEN
9
Internal Clock Source Block
CLKS
DCOOUT
n=0-3
BDIV
/ 2
/ 2
n
ICSERCLK
ICSIRCLK
ICSOUT
ICSLCLK
ICSFFCLK
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