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Clock Radio
Sonic Alert msm80c154s
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INTERNAL SPECIFICATIONS
147
XTAL 2
XTAL 1
TIMER, S-I/O &
INTERRUPT
CPU CONTROL
CLOCK
Bit
Set
SMOD
HPD
RPD
—
GF1
GF0
PD
IDL
76543210
*•
PCON, 87H
CONTROL
Figure 4-53 ldle mode equivalent circuit
1
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