PD17012_15 Datasheet, PDF (99/320 Pages) Renesas Technology Corp – 4-BIT SINGLE-CHIP MICROCONTROLLERS WITH DIGITAL TUNING SYSTEM HARDWARE

µPD17012, 17P012
11. INTERRUPTS
11.1 Outline of Interrupt Block
Figure 11-1 illustrates the interrupt block.
As shown in the figure, the interrupt block temporarily stops the program currently being executed in response
to an interrupt request output from any peripheral hardware unit and branches execution to an interrupt vector
address.
The interrupt block consists of an interrupt control block for each peripheral hardware unit, interrupt enable
flip-flop that enables all the interrupts, stack pointer that is controlled when an interrupt is acknowledged,
address stack register, program counter, and interrupt stack.
The interrupt control block of each peripheral hardware unit consists of an interrupt request flag (IRQxxx) that
detects each interrupt request, interrupt enable flag (IPxxx) that enables each interrupt, and vector address
generator (VAG) that specifies a vector address when an interrupt is acknowledged.
The peripheral hardware units that have an interrupt function are as follows:
• INT pin (rising-edge detection)
• 12-bit timer
• Basic timer 1
• Serial interface
Data Sheet U10101EJ4V0DS
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