Datasheet

Oscillator (OSC)
MC68HC908JL3E Family Data Sheet, Rev. 4
68 Freescale Semiconductor
Figure 6-1. X-tal Oscillator External Connections
Figure 6-2. RC Oscillator External Connections
C
1
C
2
SIMOSCEN
XTALCLK
R
B
X
1
R
S
*
*R
S
can be zero (shorted) when used with higher-frequency crystals.
MCU
From SIM
Refer to manufacturer’s data.
OSC2OSC1
÷ 2
OSCOUT2OSCOUT
To SIMTo SIM
See Chapter 16 Electrical Specifications for component
value requirements.
MCU
R
EXT
C
EXT
SIMOSCEN
OSC1
Ext-RC
Oscillator
EN
RCCLK
÷ 2
OSCOUT2OSCOUT
To SIMFrom SIM
V
DD
PTA6
I/O
0
1
PTA6
PTA6EN
PTA6/RCCLK (OSC2)
To SIM
See Chapter 16 Electrical Specifications for component
value requirements.