MC9S08GT16CFB Freescale Semiconductor, MC9S08GT16CFB Datasheet - Page 120
MC9S08GT16CFB
Manufacturer Part Number
MC9S08GT16CFB
Description
Manufacturer
Freescale Semiconductor
Datasheet
1.MC9S08GT16CFB.pdf
(290 pages)
Specifications of MC9S08GT16CFB
Cpu Family
HCS08
Device Core Size
8b
Frequency (max)
20MHz
Interface Type
SCI/SPI
Program Memory Type
Flash
Program Memory Size
16KB
Total Internal Ram Size
1KB
# I/os (max)
36
Number Of Timers - General Purpose
4
Operating Supply Voltage (typ)
2.5/3.3V
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
2.08V
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
PQFP
Lead Free Status / Rohs Status
Not Compliant
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Internal Clock Generator (ICG) Module
LOCRE — Loss of Clock Reset Enable
RFD — Reduced Frequency Divider
7.5.3
CLKST — Clock Mode Status
120
The LOCRE bit determines how the system handles a loss of clock condition.
The RFD bits control the value of the divider following the clock select circuitry. The value specified
by the RFD bits establishes the division factor (R) applied to the selected output clock source. Writes
to the RFD bits will not take effect if a previous write is not complete.
The CLKST bits indicate the current clock mode. The CLKST bits don’t update immediately after a
write to the CLKS bits due to internal synchronization between clock domains.
1 = Generate a reset request on loss of clock.
0 = Generate an interrupt request on loss of clock.
ICG Status Register 1 (ICGS1)
Reset:
Read:
Write:
Table 7-8. RFD Reduced Frequency Divider Select
Bit 7
0
Figure 7-15. ICG Status Register 1 (ICGS1)
CLKST
RFD
000
001
010
011
100
101
110
111
= Unimplemented or Reserved
MC9S08GB/GT Data Sheet, Rev. 2.3
6
0
REFST
5
0
Division Factor (R)
LOLS
÷128
÷16
÷32
÷64
4
0
÷1
÷2
÷4
÷8
LOCK
3
0
LOCS
2
0
ERCS
Freescale Semiconductor
1
0
ICGIF
Bit 0
1
0
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