HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 79

• Manufacturer Part Number: HD6417021
• Description: SuperH RISC engine
• Manufacturer: Hitachi Semiconductor

62 HITACHI
UBC: User break controller
DMAC: Direct memory access controller
ITU: 16-bit integrated-timer pulse unit
SCI: Serial communications interface
PRT: Parity control unit of BSC
DMAC
IRQ0
IRQ1
IRQ2
IRQ3
IRQ4
IRQ5
IRQ6
IRQ7
WDT
IRQOUT
UBC
PRT
REF
NMI
SCI
ITU
(Interrupt request)
(Interrupt request)
(Interrupt request)
(Interrupt request)
(Interrupt request)
(Interrupt request)
(Interrupt request)
Figure 5.1 Block Diagram of the Interrupt Controller
ICR
control
Input
Module bus
IPRA–IPRE
IPR
decision
Priority
logic
WDT: Watchdog timer
REF: DRAM refresh control unit of BSC
ICR: Interrupt control register
IPRA–IPRE: Interrupt priority registers A–E
SR: Status register
interface
Bus
parator
Com-
INTC
Interrupt request
I3
I2
CPU
SR
I1
I0