mc68hc908jb8 Freescale Semiconductor, Inc, mc68hc908jb8 Datasheet - Page 90

• Manufacturer Part Number: mc68hc908jb8
• Description: M68hc08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Oscillator (OSC)
7.3 Oscillator External Connections
Technical Data
90
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:
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)
C1
MC68HC908JB8•MC68HC08JB8•MC68HC08JT8 — Rev. 2.3
R
X1
B
S
1
(optional)
2
B
TO USB
(can also be a fixed capacitor)
OSC2
R
C2
S
*
Figure
DOUBLER
CLOCK
* R
higher frequency crystals.
Refer to manufacturer’s data.
S
can be 0 (shorted) when used with
7-1. This figure shows only
OSCXCLK
TO SIM
Freescale Semiconductor
2
OSCOUT
TO SIM