3803 datasheet(29/119 Pages) RENESAS

Nome de Peças	3803

Descrição Electrónicos	SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

PDF	119 Pages

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Fabricante Electrônico	RENESAS [Renesas Technology Corp]

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29 / 119 page

Rev.1.00

Apr 2, 2007

Page 29 of 117

REJ03B0212-0100

3803 Group (Spec.L)

Fig 24. Timing of interrupt request generation, interrupt request bit, and interrupt acceptance

(1) The interrupt request bit for an interrupt request generated during period 1 is set to “1” at timing point IR1.

(2) The interrupt request bit for an interrupt request generated during period 2 is set to “1” at timing point IR1 or IR2.

The timing point at which the bit is set to “1” varies depending on conditions. When two or more interrupt

requests are generated during the period 2, each request bit may be set to “1” at timing point IR1 or IR2

separately.

T1 T2 T3 : Interrupt acceptance timing points

IR1 IR2 : Timings points at which the interrupt request bit is set to “1”.

Note : Period 2 indicates the last

φ cycle during one instruction cycle.

IR1 T2

SYNC

IR2 T3

Internal clock

Instruction cycle

Push onto stack

Vector fetch

Instruction cycle

3803 Folha de dados(PDF) 29 Page - Renesas Technology Corp