MC9S08GT60ACFDE Freescale, MC9S08GT60ACFDE Datasheet - Page 29
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MC9S08GT60ACFDE
Manufacturer Part Number
MC9S08GT60ACFDE
Description
Manufacturer
Freescale
Datasheet
1.MC9S08GT60ACFDE.pdf
(302 pages)
Specifications of MC9S08GT60ACFDE
Cpu Family
HCS08
Device Core Size
8b
Frequency (max)
40MHz
Interface Type
I2C/SCI/SPI
Total Internal Ram Size
4KB
# I/os (max)
39
Number Of Timers - General Purpose
4
Operating Supply Voltage (typ)
2.5/3.3V
Operating Supply Voltage (max)
3.6V
Operating Supply Voltage (min)
1.8/2.08V
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
48
Package Type
QFN EP
Program Memory Type
Flash
Program Memory Size
60KB
Lead Free Status / RoHS Status
Compliant
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2.3.1
V
I/O buffer circuitry and to an internal voltage regulator. The internal voltage regulator provides regulated
lower-voltage source to the CPU and other internal circuitry of the MCU.
Typically, application systems have two separate capacitors across the power pins. In this case, there
should be a bulk electrolytic capacitor, such as a 10-μF tantalum capacitor, to provide bulk charge storage
for the overall system and a 0.1-μF ceramic bypass capacitor located as close to the MCU power pins as
practical to suppress high-frequency noise.
V
the ATD. A 0.1-μF ceramic bypass capacitor should be located as close to the MCU power pins as practical
to suppress high-frequency noise.
2.3.2
Out of reset, the MCU uses an internally generated clock (self-clocked mode — f
approximately equivalent to an 8-MHz crystal rate. This frequency source is used during reset startup and
can be enabled as the clock source for stop recovery to avoid the need for a long crystal startup delay. This
MCU also contains a trimmable internal clock generator (ICG) module that can be used to run the MCU.
For more information on the ICG, see
The oscillator in this MCU is a Pierce oscillator that can accommodate a crystal or ceramic resonator in
either of two frequency ranges selected by the RANGE bit in the ICGC1 register. Rather than a crystal or
ceramic resonator, an external oscillator can be connected to the EXTAL input pin, and the XTAL output
pin can be used as general I/O.
Refer to
resistors such as carbon composition resistors. Wire-wound resistors, and some metal film resistors, have
too much inductance. C1 and C2 normally should be high-quality ceramic capacitors that are specifically
designed for high-frequency applications.
R
value is not generally critical. Typical systems use 1 MΩ to 10 MΩ. Higher values are sensitive to
humidity and lower values reduce gain and (in extreme cases) could prevent startup.
C1 and C2 are typically in the 5-pF to 25-pF range and are chosen to match the requirements of a specific
crystal or resonator. Be sure to take into account printed circuit board (PCB) capacitance and MCU pin
capacitance when sizing C1 and C2. The crystal manufacturer typically specifies a load capacitance which
is the series combination of C1 and C2 which are usually the same size. As a first-order approximation,
use 10 pF as an estimate of combined pin and PCB capacitance for each oscillator pin (EXTAL and
XTAL).
2.3.3
RESET is a dedicated pin with a pullup device built in. It has input hysteresis, a high current output driver,
and no output slew rate control. Internal power-on reset and low-voltage reset circuitry typically make
external reset circuitry unnecessary. This pin is normally connected to the standard 6-pin background
Freescale Semiconductor
F
DD
DDAD
is used to provide a bias path to keep the EXTAL input in its linear range during crystal startup and its
and V
and V
Figure 2-4
Power
Oscillator
Reset
SS
SSAD
are the primary power supply pins for the MCU. This voltage source supplies power to all
are the analog power supply pins for the MCU. This voltage source supplies power to
for the following discussion. R
MC9S08GB60A Data Sheet, Rev. 2
Chapter 7, “Internal Clock Generator
S
(when used) and R
F
should be low-inductance
(S08ICGV2).”
Chapter 2 Pins and Connections
Self_reset
), that is
29
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