MC68HC908GR8CFA Freescale Semiconductor, MC68HC908GR8CFA Datasheet - Page 107
![no-image](/images/manufacturer_photos/0/2/262/freescale_semiconductor_sml.jpg)
MC68HC908GR8CFA
Manufacturer Part Number
MC68HC908GR8CFA
Description
IC MCU FLSH 8BIT8MHZ 7.5K32-LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Specifications of MC68HC908GR8CFA
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI, SPI
Peripherals
LVD, POR, PWM
Number Of I /o
21
Program Memory Size
7.5KB (7.5K x 8)
Program Memory Type
FLASH
Ram Size
384 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 6x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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MC68HC908GR8 — Rev 4.0
MOTOROLA
4. Select a VCO frequency multiplier, N.
5. If N is < N
6. Calculate and verify the adequacy of the VCO and bus
7. Select the VCO’s power-of-two range multiplier E, according to
Freescale Semiconductor, Inc.
For More Information On This Product,
allows. See
divider, R = 1. After choosing N and P, the actual bus frequency
can be determined using equation in 2 above.
When the tolerance on the bus frequency is tight, choose f
an integer divisor of f
requirement, use the following equation to solve for R with
practical choices of f
lowest R.
Reduce N/R to the lowest possible R.
Then recalculate N:
frequencies f
Clock Generator Module (CGMC)
R
Go to: www.freescale.com
=
round R
max
Electrical
VCLK
, use P = 0. If N > N
N max
N max
N max
N
MAX
f
N
VCLK
Current N Value
and f
=
0
=
RCLK
BUSDES
round
<
<
2
4
f
Specifications. Choose the reference
round
BUS
N
N
<
<
=
BUS
f
------------------------- -
N
N
VCLKDES
, and choose the f
N max
2
f
N max
=
RCLK
P
R
------------------------------------ -
.
N max
N max
, and R = 1. If f
R f
------------------------------------ -
f
f
N R
VCLK
RCLK
f
f
VCLKDES
RCLK
VCLKDES
max
2
–
4
8
integer
4
2
, choose P using this table:
f
Clock Generator Module (CGMC)
RCLK
P
RCLK
f
------------------------- -
RCLK
VCLKDES
P
0
1
2
3
f
RCLK
Functional Description
cannot meet this
that gives the
Technical Data
RCLK
107
to
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