xr82c684 Exar Corporation, xr82c684 Datasheet - Page 48

• Manufacturer Part Number: xr82c684
• Description: Cmos Quad Channel Uart Quart
• Manufacturer: Exar Corporation

External Vectored Interrupt Processing (Interrupt
Mode 0)
Op-Code (hex)
XR82C684
Used with Vectored Interrupts (Mode 0)
Table 9. Z-80 CPU Restart Instructions
•
Mnemonic
Table 9
Address (hex)
Restart
Table 9
Direct Interrupt Processing (Interrupt Mode 1)
Peripheral Vectored Interrupt Processing (Interrupt
Mode 2)
that if the IEI input to the QUART (or Zilog peripheral
device) is “low” then the QUART (or Zilog peripheral
device) will be disabled from generating any interrupt
requests to the CPU.
Figure 23
Section C.6.2.3
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Please note