UPD75206CW NEC [NEC], UPD75206CW Datasheet - Page 23

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UPD75206CW

Manufacturer Part Number
UPD75206CW
Description
4-BIT SINGLE-CHIP MICROCOMPUTER
Manufacturer
NEC [NEC]
Datasheet

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5.9
on reset signal is generated. (See Fig. 8-1 Reset Signal Generator)
manipulation instructions (SKT, SKF, SKTCLR) or cleared (CLR1).
Note
6. INTERRUPT FUNCTIONS
The power-on flag (PONF) is automatically set (1) when the power-on reset circuit is activated and the power-
The PONF is mapped at bit 0 of address FD1H in the data memory space and can be tested by the memory bit
The PD75206 has eight types of interrupt sources and can generate multiple interrupts with priority order.
It is also equipped with two types of test sources. INT2 is an edge detected testable input.
The PD75206 interrupt control circuit has the following functions:
POWER-ON FLAG (MASK OPTION)
The PONF cannot be set by SET1 instruction.
Hardware-controller vectored interrupt function which can control interrupt acknowledge with the
interrupt enable flag (IE
Function of setting any interrupt start address.
Multiple interrupt function which can specify priority order with the interrupt priority select register (IPS).
Interrupt request flag (IRQ
Standby mode release function. (Interrupt to be released by interrupt enable flag can be selected.)
) and the interrupt master enable flag (IME).
) test function. (Interrupt generation can be checked by software.)
PD75206
23

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