M68EVB908GB60E Freescale Semiconductor, M68EVB908GB60E Datasheet - Page 123

• Manufacturer Part Number: M68EVB908GB60E
• Description: BOARD EVAL FOR MC9S08GB60
• Manufacturer: Freescale Semiconductor
• Type: MCUr

Specifications of M68EVB908GB60E

• Contents: Module and Misc Hardware
• Processor To Be Evaluated: MC9S08GB
• Data Bus Width: 8 bit
• Interface Type: RS-232
• Silicon Manufacturer: Freescale
• Core Architecture: HCS08
• Core Sub-architecture: HCS08
• Silicon Core Number: MC9S08
• Silicon Family Name: S08GB
• Kit Contents: GB60 Evaluation Kit
• Rohs Compliant: Yes
• For Use With/related Products: MC9S08GB60
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The filter registers show the filter value (FLT).
FLT — Filter Value
7.5.6
TRIM — ICG Trim Setting
Freescale Semiconductor
The FLT bits indicate the current filter value, which controls the DCO frequency. The FLT bits are
read only except when the CLKS bits are programmed to self-clocked mode (CLKS = 00). In
self-clocked mode, any write to ICGFLTU updates the current 12-bit filter value. Writes to the
ICGFLTU register will not affect FLT if a previous latch sequence is not complete.
The TRIM bits control the internal reference generator frequency. They allow a ± 25% adjustment of
the nominal (POR) period. The bit’s effect on period is binary weighted (i.e., bit 1 will adjust twice as
much as changing bit 0). Increasing the binary value in TRIM will increase the period and decreasing
the value will decrease the period.
ICG Trim Register (ICGTRM)
Reset:
Reset:
Read:
Write:
Read:
Write:
POR:
U = Unaffected by MCU reset
Figure 7-18. ICG Lower Filter Register (ICGFLTL)
Bit 7
U
1
7
1
Figure 7-19. ICG Trim Register (ICGTRM)
MC9S08GB/GT Data Sheet, Rev. 2.3
U
6
1
6
0
U
5
0
5
0
U
4
0
4
0
TRIM
FLT
U
3
0
3
0
U
2
0
2
0
ICG Registers and Control Bits
U
1
0
1
0
Bit 0
U
0
0
0
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