MC908LJ24CPKE Freescale Semiconductor, MC908LJ24CPKE Datasheet - Page 120

• Manufacturer Part Number: MC908LJ24CPKE
• Description: IC MCU 8BIT 24K FLASH 80-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC908LJ24CPKE

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, IRSCI, SPI
• Peripherals: LCD, LVD, POR, PWM
• Number Of I /o: 48
• 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: 80-LQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

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