UBC:
User break controller
DMAC: Direct memory access controller
DIVU:
Division unit
FRT:
Free-running timer
SCI:
Serial communications interface
WDT:
Watchdog timer
REF:
Refresh request within bus state controller
68 Hitachi
ICR:
IPRA/B:
VCRWDT: Vector number setting register WDT
VCRA–D: Vector number setting registers A–D
SR:
Figure 5.1 INTC Block Diagram
Interrupt control register
Interrupt priority level setting
registers A and B
Status register