MC68HC908JL8CDW Freescale Semiconductor, MC68HC908JL8CDW Datasheet - Page 82
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MC68HC908JL8CDW
Manufacturer Part Number
MC68HC908JL8CDW
Description
IC MCU 8K FLASH 8MHZ 28-SOIC
Manufacturer
Freescale Semiconductor
Series
HC08r
Datasheet
1.MC908JL8CDWER.pdf
(212 pages)
Specifications of MC68HC908JL8CDW
Core Processor
HC08
Core Size
8-Bit
Speed
8MHz
Connectivity
SCI
Peripherals
LED, LVD, POR, PWM
Number Of I /o
23
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 13x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-SOIC (7.5mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68HC908JL8CDW
Manufacturer:
MOTOROLA/摩托罗拉
Quantity:
20 000
Part Number:
MC68HC908JL8CDWE
Manufacturer:
FREESCALE
Quantity:
20 000
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Oscillator (OSC)
6.4 I/O Signals
The following paragraphs describe the oscillator I/O signals.
6.4.1 Crystal Amplifier Input Pin (OSC1)
OSC1 pin is an input to the crystal oscillator amplifier or the input to the RC oscillator circuit.
6.4.2 Crystal Amplifier Output Pin (OSC2/RCCLK/PTA6/KBI6)
For the XTAL oscillator, OSC2 pin is the output of the crystal oscillator inverting amplifier.
For the RC oscillator, OSC2 pin can be configured as a general purpose I/O pin PTA6, or the output of
the RC oscillator, RCCLK.
6.4.3 Oscillator Enable Signal (SIMOSCEN)
The SIMOSCEN signal comes from the system integration module (SIM) and enables/disables the XTAL
oscillator circuit or the RC-oscillator.
6.4.4 XTAL Oscillator Clock (XTALCLK)
XTALCLK is the XTAL oscillator output signal. It runs at the full speed of the crystal (f
directly from the crystal oscillator circuit.
and OSC2 and may not represent the actual circuitry. The duty cycle of XTALCLK is unknown and may
depend on the crystal and other external factors. Also, the frequency and amplitude of XTALCLK can be
unstable at start-up.
6.4.5 RC Oscillator Clock (RCCLK)
RCCLK is the RC oscillator output signal. Its frequency is directly proportional to the time constant of the
external R and C.
the actual circuitry.
6.4.6 Oscillator Out 2 (2OSCOUT)
2OSCOUT is same as the input clock (XTALCLK or RCCLK). This signal is driven to the SIM module.
82
The internal oscillator is a free running oscillator and is available after each
POR or reset. It is turned-off in stop mode by setting the STOP_ICLKDIS
bit in CONFIG2 (see
MC68HC908JL8/JK8 • MC68HC08JL8/JK8 • MC68HC908KL8 Data Sheet, Rev. 3.1
Figure 6-3
Oscillator
XTAL
RC
shows only the logical relation of RCCLK to OSC1 and may not represent
3.4 Configuration Register 2
Controlled by PTA6EN bit in PTAPUE ($000D)
PTA6EN = 0: RCCLK output
PTA6EN = 1: PTA6/KBI6
Figure 6-2
NOTE
shows only the logical relation of XTALCLK to OSC1
OSC2 pin function
Inverting OSC1
(CONFIG2)).
Freescale Semiconductor
XCLK
) and comes
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