Chapter 20 Interrupt Request Processing Function
20.1 Non-maskable Interrupt (NMI) ..................................................................... 20-2
20.2 Maskable Interrupt ....................................................................................... 20-4
[1] Interrupt Request Flag Disable Register IRQD
(IRQD0L, IRQD0H, IRQD1L, IRQD1H, IRQD2L) ........................... 20-6
[2] Interrupt Request Register IRQ (IRQ0L, IRQ0H, IRQ1L, IRQ1H, IRQ2L) ... 20-6
[3] Interrupt Enable Register IE (IE0L, IE0H, IE1L, IE1H, IE2L).................... 20-6
[4] Master Interrupt Enable Flag (MIE) .......................................................... 20-6
[5] Master Interrupt Priority Flag (MIPF) ........................................................ 20-6
[6] Interrupt Priority Control Register
IPX0 (IP00L, IP00H, IP10L, IP10H, IP20L),
IPX1 (IP01L, IP01H, IP11L, IP11H, IP21L) .................................... 20-7
20.3 Operation of Maskable Interrupt .................................................................. 20-8
Chapter 21 Bus Port Functions
21.1 Bus Port (P0, P1, P12_0, P12_1) Functions ............................................... 21-1
21.1.1 Operation of P0, P1, P12_0 and P12_1 During a Program Memory
Access .................................................................................................... 21-1
21.2 External Memory Access ............................................................................. 21-2
21.2.1 External Program Memory Access ......................................................... 21-2
21.2.2 External Program Memory Access Timing ............................................. 21-2
Chapter 22 Expansion Port
22.1 Expansion Port Configuration ...................................................................... 22-1
22.2 Expansion Port Control Register (EXTPCON)............................................. 22-2
22.3 Expansion Port Register (EXTPD)............................................................... 22-3
22.4 Expansion Port Operation............................................................................ 22-3
[1] Input Mode................................................................................................ 22-3
[2] Output Mode ............................................................................................. 22-4
Contents-10
OKI [ OKI ELECTRONIC COMPONETS ]
