Table of Contents
LH77790B User’s Guide
xii
Reading/Writing Port C...........................................................................................13-19
MODE 0..............................................................................................................13-20
Port C Function ..............................................................................................13-20
Read Operation..............................................................................................13-20
Write Operation (Normal) ...............................................................................13-20
Write Operation (Set/Reset)...........................................................................13-20
MODE 1..............................................................................................................13-20
Port C Function ..............................................................................................13-20
Read Operation..............................................................................................13-20
Write Operation ..............................................................................................13-21
MODE 2..............................................................................................................13-21
Port C Function ..............................................................................................13-21
Read Operation..............................................................................................13-21
Write Operation ..............................................................................................13-21
Chapter 14 Interrupt Controller
Introduction...............................................................................................................14-1
Features...................................................................................................................14-1
Block Diagram..........................................................................................................14-1
Internal Diagram.......................................................................................................14-2
Register Map............................................................................................................14-2
Interrupt Channel Assignment..................................................................................14-3
General Operation....................................................................................................14-3
Register Description.................................................................................................14-4
Interrupt Configuration Registers (ICR0/ICR1).....................................................14-4
ICR0 .................................................................................................................14-4
ICR1 .................................................................................................................14-4
Interrupt Clear Register (ICLR) ............................................................................14-5
IRQ interrupt Enable Register (IRQER) ...............................................................14-6
FIQ Interrupt Enable Register (FIQER) The FIQ..................................................14-6
IRQ Status Register (IRQSR)...............................................................................14-7
FIQ Status Register (FIQSR) ...............................................................................14-7
Interrupt Polling Register (IPR) ............................................................................14-8
Priority......................................................................................................................14-8
Exceptions................................................................................................................14-9
Chapter 15 I/O Configuration
Introduction...............................................................................................................15-1
Register Map............................................................................................................15-1
Register Description.................................................................................................15-1
Input/Output Configuration Register (IOCR) ........................................................15-1
Chapter 16 Reset
Introduction...............................................................................................................16-1
External Reset Source .............................................................................................16-1
Watchdog Timer.......................................................................................................16-1
Software Controlled Reset .......................................................................................16-2
JTAG Reset..............................................................................................................16-2