HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 165

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

An example of connections for external vector mode interrupts is shown in figure 5.2, and an
example of connections for auto-vector mode interrupts in figure 5.3.
Figures 5.4 to 5.7 show the interrupt vector fetch cycle for the external vector mode. During this
cycle, CS0–CS4 stay high. A24–A4 output undefined values. The WAIT pin is sampled, but
programmable waits are not valid.
requests
Interrupt
Figure 5.2 Example of Connections for External Vector Mode Interrupts
requests
Interrupt
Figure 5.3 Example of Connections for Auto-Vector Mode Interrupts
Vector number
encoder
Priority
generator
encoder
Priority
circuit
D0–D7
IRL0–IRL3
IRL0–IRL3
4
4
IRL0–IRL3
IRL0–IRL3
A0–A3
IVECF
RD
D0–D7
Chip
Chip
147