PD77210_15 Datasheet, PDF (40/76 Pages) Renesas Technology Corp – 16-BIT FIXED-POINT DIGITAL SIGNAL PROCESSOR

8. GENERAL-PURPOSE PORT AND INTERRUPT
8.1 General-purpose Port Pins
The general-purpose port pins alternate with the interrupt or host interface pins.
The configuration of the general-purpose port is illustrated below.
µPD77210, 77213
Port pin
OE
O Port I/O
I
OE
Note
O Host I/O
I
Interrupt
controller
Note P0 to P7 do not alternate with the host interfave pins.
8.2 Interrupt Pin
The general-purpose port pin functions as an interrupt pin and the signal input to the port is always input to the
interrupt controller. The interrupt controller recognizes the interrupt by detecting a falling edge.
The output of the general-purpose port or host interface pin can be also used as an interrupt input.
Pins HRD, HWR, ASOEN, ASIEN, TSOEN, and TSIEN are connected to the interrupt controller and can be used
as interrupt pins.
38
Data Sheet U15203EJ3V0DS