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| MC68HC908LB8_05 Datasheet, PDF (127/234 Pages) Freescale Semiconductor, Inc – M68HC08 Microcontrollers | |||
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Functional Description
FROM SIM
TO SIM
TO SIM
BUSCLKX4
BUSCLKX2
SIMOSCEN
XTALCLK
÷2
MCU
OSC1
RB
X1
C1
OSC2
RS(1)
Note 1:
RS can be zero (shorted) when used with higher
frequency crystals. Refer to manufacturerâs
data. See Chapter 20 Electrical
Specifications for component value
requirements.
C2
Figure 13-2. XTAL Oscillator External Connections
FROM SIM
INTCLK
0
1
SIMOSCEN
EN
EXTERNAL RC
OSCILLATOR
RCCLK
OSCRCOPT
TO SIM
TO SIM
BUSCLKX4
BUSCLKX2
÷2
MCU
OSC1
1
0
PTC1
I/O
PTC1/BUSCLKX4 (OSC2)
PTC1
OSC2EN
VDD
REXT
See Chapter 20 Electrical Specifications
for component value requirements.
Figure 13-3. RC Oscillator External Connections
MC68HC908LB8 Data Sheet, Rev. 1
Freescale Semiconductor
127
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