MC68HC908LJ24CPB Freescale Semiconductor, MC68HC908LJ24CPB Datasheet - Page 120
MC68HC908LJ24CPB
Manufacturer Part Number
MC68HC908LJ24CPB
Description
IC MCU 24K FLASH 8MHZ SPI 64LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908LK24CFUE.pdf
(464 pages)
Specifications of MC68HC908LJ24CPB
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
I²C, IRSCI, SPI
Peripherals
LCD, LVD, POR, PWM
Number Of I /o
40
Program Memory Size
24KB (24K x 8)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 6x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
64-LQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
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Clock Generator Module (CGM)
Data Sheet
120
NOTE:
Exceeding the recommended maximum bus frequency or VCO
frequency can crash the MCU.
6. Select the VCO’s power-of-two range multiplier E, according to
7. Select a VCO linear range multiplier, L, where f
8. Calculate and verify the adequacy of the VCO programmed
9. Verify the choice of P, R, N, E, and L by comparing f
this table:
center-of-range frequency, f
the midpoint between the minimum and maximum frequencies
attainable by the PLL.
For proper operation,
and f
application’s tolerance of f
possible to f
NOTE: Do not program E to a value of 3.
Clock Generator Module (CGM)
VCLKDES
19,660,800 ≤ f
9,830,400 ≤ f
VCLK.
. For proper operation, f
0 < f
Frequency Range
VCLK
f
VRS
L
f
VCLK
VCLK
VRS
=
< 9,830,400
–
round
f
< 19,660,800
=
VCLK
< 39,321,600
VCLKDES
(
VRS
L
×
--------------------------
2
≤
E
2
. The center-of-range frequency is
f
f
--------------------------
E
VCLK
×
NOM
)f
f
, and f
NOM
NOM
MC68HC908LJ24/LK24 — Rev. 2.1
2
×
VCLK
2
E
VRS
must be within the
Freescale Semiconductor
must be as close as
NOM
E
0
1
2
= 38.4kHz
VCLK
to f
VRS
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