UPD75068CUA データシートの表示（PDF） - NEC => Renesas Technology
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UPD75068CUA Datasheet PDF : 68 Pages
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µPD75064, 75066, 75068, 75064(A), 75066(A), 75068(A)
6. INTERRUPT FUNCTIONS
The µPD75068 has six different interrupt sources. In addition, multiple interrupts with priority control are
possible. Two types of test sources are provided. Of these test sources, INT2 has two types of edge detection
testable inputs.
Table 6-1. Interruption Source Types
INTBT
INT4
INT0
INT1
INTCSI
INTT0
INT2Note2
INTWNote2
Interruption Source
IN/OUT
(Reference time interval signal from
basic interval timer)
(Detection of both rising edge and
falling edge is valid.)
(Selection of rising edge detection or
falling edge detection)
(Serial data transmission completion
signal)
(Coincidence signal of programmable
timer/counter count register and modulo
register)
(Detection of rising edge of input to
INT2 pin or detection of falling edge of
any input to KR0 to KR3)
(Signal from watch timer)
IN
OUT
OUT
OUT
IN
IN
OUT
IN
Interruption Vectored Interrupt Request Signal
OrderNote1
(Vector table address)
1
VRQ1 (0002H)
2
VRQ2 (0004H)
3
VRQ3 (0006H)
4
VRQ4 (0008H)
5
VRQ5 (000AH)
Test input signal (Set IRQ and IRQW)
Notes 1. The interruption order shows the priority order of the pins when several interruption requests occur
at the same time.
2. Test source. Like the interruption source, it is influenced by the interruption enable flag. However,
vectored interrupt will not occur.
The interrupt control circuit of the µPD75068 has the following functions:
• Hardware controlled vectored interrupt function which can control whether or not to acknowledge an
interrupt based on the interrupt flag (IE×××) and interrupt master enable flag (IME)
• The interrupt start address can be set arbitrarily.
• Interrupt request flag (IRQ×××) test function (an interrupt generation can be confirmed by software)
• Standby mode release (interrupts to be released can be selected by the interrupt enable flag)
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