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HC705RC17GRS/D Datasheet(PDF) 53 Page - NXP Semiconductors

No. de pieza HC705RC17GRS/D
Descripción Electrónicos  The MC68HC705RC17 is a general-purpose, low-cost addition to the M68HC05 Family of microcontroller units (MCUs) and is suitable for remote control applications.
PDF  126 Pages
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Fabricante Electrónico  NXP [NXP Semiconductors]
Página de inicio  http://www.nxp.com
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HC705RC17GRS/D Datasheet(HTML) 53 Page - NXP Semiconductors

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Low-Power Modes
Wait Mode
MC68HC705RC17 — Rev. 2.0
General Release Specification
Low-Power Modes
During wait mode, the I bit in the CCR is cleared to enable interrupts. All
other registers, memory, and input/output lines remain in their previous
states. The timer may be enabled to allow a periodic exit from wait mode.
NOTE:
For minimum current consumption, the phase-locked loop (PLL) should
be disabled or turned off before entering wait mode.
Figure 6-2. Stop/Wait Flowchart
TURN ON OSCILLATOR.
WAIT FOR TIME
DELAY TO STABILIZE.
1. FETCH RESET
VECTOR OR
2. SERVICE
INTERRUPT
A. STACK
B. SET I BIT
C. VECTOR TO
INTERRUPT
ROUTINE
RESTART
PROCESSOR CLOCK.
1. FETCH RESET
VECTOR OR
2. SERVICE
INTERRUPT
A. STACK
B. SET I BIT
C. VECTOR TO
INTERRUPT
ROUTINE
Y
Y
Y
Y
Y
N
N
N
N
N
STOP
WAIT
OSCILLATOR ACTIVE.
CORE TIMER CLOCK ACTIVE.
PROCESSOR CLOCKS
STOPPED.
STOP OSCILLATOR
AND ALL CLOCKS.
CLEAR I BIT.
IR TIMER
INTERNAL
INTERRUPT?
CORE TIMER
INTERNAL
INTERRUPT?
N
Y
Y
IR TIMER CLOCK ACTIVE.
EXTERNAL
INTERRUPT
(IRQ)?
(PTB KEYSCAN PULLUPS)
EXTERNAL
(IRQ)?
(PTB KEYSCAN PULLUPS)
INTERRUPT
LPRST
OR
RESET?
LPRST
OR
RESET?
Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com



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