MC68HC908JB12JDW Freescale Semiconductor, MC68HC908JB12JDW Datasheet - Page 94

• Manufacturer Part Number: MC68HC908JB12JDW
• Description: IC MCU 12K FLASH 6MHZ USB 20SOIC
• Manufacturer: Freescale Semiconductor
• Series: HC08r

Specifications of MC68HC908JB12JDW

• Core Processor: HC08
• Core Size: 8-Bit
• Speed: 6MHz
• Connectivity: SCI, USB
• Peripherals: LED, LVD, POR, PWM
• Number Of I /o: 13
• Program Memory Size: 12KB (12K x 8)
• Program Memory Type: FLASH
• Ram Size: 384 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

Oscillator (OSC)
7.3 Oscillator External Connections
Technical Data
94
In its typical configuration, the oscillator requires five external
components. The crystal oscillator is normally connected in a Pierce
oscillator configuration, as shown in
the logical representation of the internal components and may not
represent actual circuitry. The oscillator configuration uses five
components:
The series resistor (R
oscillator guidelines and may not be required for all ranges of operation,
especially with high-frequency crystals. Refer to the crystal
manufacturer’s data for more information.
FROM SIM
•
•
•
•
•
SIMOSCEN
Crystal, X
Fixed capacitor, C
Tuning capacitor, C
Feedback resistor, R
Series resistor, R
MCU
Figure 7-1. Oscillator External Connections
1
OSC1
Oscillator (OSC)
(nominally 12MHz)
C1
12 MHz
S
R
X1
) is included in the diagram to follow strict Pierce
B
S
1
(not required for 12MHz)
OSCXCLK
2
B
(can also be a fixed capacitor)
TO CGM
OSC2
R
C2
S
*
Figure
DOUBLER
CLOCK
* R
higher frequency crystals.
Refer to manufacturer’s data.
S
÷ 2
can be 0 (shorted) when used with
7-1. This figure shows only
OSCDCLK
MC68HC908JB16
TO COP, SCI
TO USB
Freescale Semiconductor
÷ 2
OSCOUT
—
Rev. 1.1
TO SIM