TS68302MAB Atmel Corporation, TS68302MAB Datasheet - Page 36

• Manufacturer Part Number: TS68302MAB
• Description: 16-bit Communication Controller, 16-20 MHz
• Manufacturer: Atmel Corporation

Figure 28. Interrupt Controller Block Diagram
Parallel I/O Ports
36
PB8-PB11
TIMERS
TS68302
SMCs
DMA
SCP
SCC1 EVENT
SCC2 EVENT
SCC3 EVENT
SCC1 MASK
SCC2 MASK
SCC3 MASK
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
REGISTER
3
1
2
2
4
1
1
1
The interrupt controller also receives external (EXRQ) requests. EXRQ interrupts are
received by the IMP according to the operational mode selected. In the normal opera-
tional mode, EXRQ interrupts are encoded onto the IPL lines. In the dedicated
operational mode, EXRQ interrupts are presented directly as IRQ7, IRQ6, and IRQ1.
The interrupt controller block diagram is shown in Figure 28. The interrupt controller fea-
tures are as follows:
•
•
•
•
•
Port A and port B are two general-purpose I/O ports. Each pin in the 16-bit port A may
be configured as a general-purpose I/O pin or as a dedicated peripheral interface pin.
Port B has 12 pins. Eight pins may be configured as general-purpose pins or as dedi-
cated peripheral interface pins, and four are general-purpose pins, each with interrupt
capability.
two operational modes: normal and dedicated,
eighteen priority-organized interrupt sources (internal and external),
fully nested interrupt environment,
unique vector number for each internal/external source,
three selectable interrupt request/interrupt acknowledge pairs.
TS68000 CORE
DATA BUS
IRQ7/
IPL0
GENERATION
INTERRUPT
RESOLVER
PRIORITY
VECTOR
IRQ6/
LOGIC
IPL1
IRQ1/
IPL2
TS68000 CORE
IPL2-IPL0 TO
2117A–HIREL–11/02
IACK7
IACK1
IACK6