HD6417021 Hitachi Semiconductor, HD6417021 Datasheet - Page 79
HD6417021
Manufacturer Part Number
HD6417021
Description
SuperH RISC engine
Manufacturer
Hitachi Semiconductor
Datasheet
1.HD6417021.pdf
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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
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