MC68HC908JL3CDW Freescale Semiconductor, MC68HC908JL3CDW Datasheet - Page 100

• Manufacturer Part Number: MC68HC908JL3CDW
• Description: IC MCU 8MHZ 4K FLASH 28-SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908JL3CDW

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 8MHz
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 23
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: FLASH
• Ram Size: 128 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.3 V
• Data Converters: A/D 12x8b
• Oscillator Type: External
• 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: -
• Connectivity: -

Oscillator (OSC)
8.5 I/O Signals
8.5.1 Crystal Amplifier Input Pin (OSC1)
8.5.2 Crystal Amplifier Output Pin (OSC2/PTA6/RCCLK)
8.5.3 Oscillator Enable Signal (SIMOSCEN)
8.5.4 X-tal Oscillator Clock (XTALCLK)
Technical Data
98
The following paragraphs describe the oscillator I/O signals.
OSC1 pin is an input to the crystal oscillator amplifier or the input to the
RC oscillator circuit.
For the X-tal oscillator device, OSC2 pin is the output of the crystal
oscillator inverting amplifier.
For the RC oscillator device, OSC2 pin can be configured as a general
purpose I/O pin PTA6, or the output of the internal RC oscillator clock,
RCCLK.
The SIMOSCEN signal comes from the system integration module (SIM)
and enables/disables the X-tal oscillator circuit or the RC-oscillator.
XTALCLK is the X-tal oscillator output signal. It runs at the full speed of
the crystal (f
Figure 8-1
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.
X-tal oscillator
RC oscillator
shows only the logical relation of XTALCLK to OSC1 and
Option
XCLK
Oscillator (OSC)
) and comes directly from the crystal oscillator circuit.
Controlled by PTAEN bit in PTAPUER ($0D)
PTA6EN = 0: RCCLK output
PTA6EN = 1: PTA6 I/O
OSC2 pin function
Inverting OSC1
MC68H(R)C908JL3
Freescale Semiconductor
—
Rev. 1.1