MC9S08GT16CFB Freescale Semiconductor, MC9S08GT16CFB Datasheet - Page 99

• Manufacturer Part Number: MC9S08GT16CFB
• Manufacturer: Freescale Semiconductor

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

7.1
Figure 7-3
(ICG) module. This section includes a general description and a feature list.
The ICG provides multiple options for clock sources. This offers a user great flexibility when making
choices between cost, precision, current draw, and performance. As seen in
of four functional blocks. Each of these is briefly described here and then in more detail in a later section.
Freescale Semiconductor
•
•
(SEE NOTE 2)
(SEE NOTE 2)
Oscillator block — The oscillator block provides means for connecting an external crystal or
resonator. Two frequency ranges are software selectable to allow optimal startup and stability.
Alternatively, the oscillator block can be used to route an external square wave to the system clock.
External sources can provide a very precise clock source.
Internal reference generator — The internal reference generator consists of two controlled clock
sources. One is designed to be approximately 8 MHz and can be selected as a local clock for the
background debug controller. The other internal reference clock source is typically 243 kHz and
can be trimmed for finer accuracy via software when a precise timed event is input to the MCU.
This provides a highly reliable, low-cost clock source.
V
V
Introduction
DDA
SSA
EXTAL
is a top-level diagram that shows the functional organization of the internal clock generation
XTAL
NOTES:
1. See
2. Not all HCS08 microcontrollers have unique supply pins for the ICG. See the device pin assignments in
INTERNAL
REFERENCE
GENERATORS
the Pins and Connections section for specifics.
WITH EXTERNAL REF
OSCILLATOR (OSC)
Figure 7-1
SELECT
TYP 243 kHz
IRG
for specific use of ICGOUT, FFE, ICGLCLK, ICGERCLK
8 MHz
RG
SELECT
REF
MC9S08GB/GT Data Sheet, Rev. 2.3
Figure 7-3. ICG Block Diagram
ICGERCLK
ICGIRCLK
LOCAL CLOCK FOR OPTIONAL USE WITH BDC
AND CLOCK DETECTOR
FREQUENCY
LOOP (FLL)
LOCKED
LOSS OF LOCK
ICG
DCO
ICGDCLK
SELECT
OUTPUT
CLOCK
CLOCK
SELECT
SELECT
CLOCK
FIXED
Figure
ICGLCLK
FFE
/R
7-3, the ICG consists
ICGOUT
Introduction
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