TCC720 Datasheet, PDF (34/143 Pages) List of Unclassifed Manufacturers – 32-bit RISC Microprocessor For Digital Media Player

TCC720
INTERRUPT CONTROLLER
32-bit RISC Microprocessor for Digital Media Player
Dec. 16. 2002
Preliminary Spec 0.51
4 INTERRUPT CONTROLLER
4.1 Overview
Interrupt controller can manage up to 16 interrupt sources. In TCC720, there are 4 external
interrupt sources that can be detected various kind of method, that is a rising edge/ falling edge
/ level high / level low detection can be set for external interrupt sources. External interrupt
sources can be reliably managed with noise filtering up to 100 ~ 400 us.
There are two types of interrupt in ARM940T, IRQ type, FIQ type.
Interrupt controller can manage these two types for each interrupt sources separately.
The following figure represents the block diagram of interrupt controller.
pi_INTIN
pi_EXTIN
Clock
Generator
ICFG
IREQ
CREQ
MREQ
IEN
IRQSEL
Noise Filter
Edge/Level
Selector
IRQ Flag
nIRQ/nFIQ
Generator
nIRQ
nFIQ
Figure 4.1 Interrupt Controller Block Diagram
4-1