4250 Просмотр технического описания (PDF) - MITSUBISHI ELECTRIC

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4250

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

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MITSUBISHI MICROCOMPUTERS

4250 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

• Program counter (PC) .............................................................. 0 0 0 0 0 0 0 0 0 0 0

Address 0 in page 0 is set to program counter.

• Interrupt enable flag (INTE) ..................................................... 0 (Interrupt disabled)

• Power down flag (P) ................................................................. 0

• External interrupt request flag (EXF0) ..................................... 0

• Timer 1 interrupt request flag (T1F) ........................................ 0

• Timer control register V1 ......................................................... 0 0 0 0

(Interrupt disabled, prescaler/timer 1 stopped)

• Key-on wakeup control register K0 ......................................... 0 0 0 0

• Pull-up control register PU0 ..................................................... 0 0

• Logic operation selection register LO ...................................... 0 0

• Carry flag (CY) ......................................................................... 0

• Register A ................................................................................. 1 1 1 1

• Register B ................................................................................. 1 1 1 1

• Stack pointer (SP) .................................................................... 1 1

Fig. 23 Internal state at reset

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