MC908LJ12CFBE Freescale Semiconductor, MC908LJ12CFBE Datasheet - Page 107
![IC MCU 12K FLASH 8MHZ 52-LQFP](/photos/12/35/123587/mc908lj12cfbe_sml.jpg)
MC908LJ12CFBE
Manufacturer Part Number
MC908LJ12CFBE
Description
IC MCU 12K FLASH 8MHZ 52-LQFP
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC68HC98LJ12CFUE.pdf
(414 pages)
Specifications of MC908LJ12CFBE
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
IRSCI, SPI
Peripherals
LCD, LVD, POR, PWM
Number Of I /o
20
Program Memory Size
12KB (12K x 8)
Program Memory Type
FLASH
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
3 V ~ 5.5 V
Data Converters
A/D 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
52-LQFP
Processor Series
HC08LJ
Core
HC08
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
SCI/SPI
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
32
Number Of Timers
4
Operating Supply Voltage
3.3 V, 5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Development Tools By Supplier
FSICEBASE, M68EML08LJLKE, ZK-HC08LX-A, M68CBL05CE
Minimum Operating Temperature
- 40 C
On-chip Adc
6-ch x 10-bit
Controller Family/series
HC08
No. Of I/o's
20
Ram Memory Size
512Byte
Cpu Speed
8MHz
No. Of Timers
2
Embedded Interface Type
SCI, SPI
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Price
Company:
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MC908LJ12CFBE
Manufacturer:
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Quantity:
135
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Manufacturer:
SANYO
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Part Number:
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MC68HC908LJ12
Freescale Semiconductor
—
Rev. 2.1
The operating range of the VCO is programmable for a wide range of
frequencies and for maximum immunity to external noise, including
supply and CGMXFC noise. The VCO frequency is bound to a range
from roughly one-half to twice the center-of-range frequency, f
Modulating the voltage on the CGMXFC pin changes the frequency
within this range. By design, f
frequency, f
factor, E, or (L × 2
CGMRCLK is the PLL reference clock, a buffered version of CGMXCLK.
CGMRCLK runs at a frequency, f
programmable modulo reference divider, which divides f
factor, R. The divider’s output is the final reference clock, CGMRDV,
running at a frequency, f
(30kHz–100kHz), always set R = 1 for specified performance. With an
external high-frequency clock source, use R to divide the external
frequency to between 30kHz and 100kHz.
The VCO’s output clock, CGMVCLK, running at a frequency, f
fed back through a programmable pre-scaler divider and a
programmable modulo divider. The pre-scaler divides the VCO clock by
a power-of-two factor P (the CGMPCLK) and the modulo divider reduces
the VCO clock by a factor, N. The dividers’ output is the VCO feedback
clock, CGMVDV, running at a frequency, f
8.4.6 Programming the PLL
The phase detector then compares the VCO feedback clock, CGMVDV,
with the final reference clock, CGMRDV. A correction pulse is generated
based on the phase difference between the two signals. The loop filter
then slightly alters the DC voltage on the external capacitor connected
to CGMXFC based on the width and direction of the correction pulse.
The filter can make fast or slow corrections depending on its mode,
described in
external capacitor and the reference frequency determines the speed of
the corrections and the stability of the PLL.
The lock detector compares the frequencies of the VCO feedback clock,
CGMVDV, and the final reference clock, CGMRDV. Therefore, the
speed of the lock detector is directly proportional to the final reference
frequency, f
condition based on this comparison.
Clock Generator Module (CGM)
RDV
NOM
8.4.4 Acquisition and Tracking
. The circuit determines the mode of the PLL and the lock
, (38.4 kHz) times a linear factor, L, and a power-of-two
E
)f
NOM
RDV
.
VRS
= f
for more information.)
RCLK
is equal to the nominal center-of-range
RCLK
/R. With an external crystal
, and is fed to the PLL through a
VDV
Clock Generator Module (CGM)
Modes. The value of the
= f
VCLK
/(N × 2
RCLK
Technical Data
P
by a
). (See
VCLK
VRS
.
, is
107
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