ez80190 ZiLOG Semiconductor, ez80190 Datasheet - Page 151

• Manufacturer Part Number: ez80190
• Description: Ez80190 Microprocessor
• Manufacturer: ZiLOG Semiconductor

PS006613-0306
Memory
Mode
Z80 Mode
ADL Mode
Z80 Mode
ADL
Bit
0
1
0
MADL
Bit
0
0
1
Operation
Read the LSB of the interrupt vector placed on the internal vectored
interrupt bus, IVECT [7:0], by the interrupting peripheral.
• IEF1 ← 0
• IEF2 ← 0
• The Starting Program Counter is effectively {MBASE, PC[15:0]}.
• Push the 2-byte return address PC[15:0] onto the ({MBASE,SPS}) stack.
• The ADL mode bit remains cleared to 0.
• The interrupt vector address is {MBASE, I[7:0], IVECT[7:0]}.
• PC[15:0] ← ({MBASE, I[7:0], IVECT[7:0]}).
• The Ending Program Counter is effectively {MBASE, PC[15:0]} =
• The interrupt service routine must end with RETI.
Read the LSB of the interrupt vector placed on the internal vectored
interrupt bus, IVECT [7:0], by the interrupting peripheral.
• IEF1 ← 0
• IEF2 ← 0
• The Starting Program Counter is PC[23:0].
• Push the 3-byte return address, PC[23:0], onto the SPL stack.
• The ADL mode bit remains set to 1.
• The interrupt vector address is {00h, I[7:0], IVECT[7:0]}.
• PC[23:0] ← ({00h, I[7:0], IVECT[7:0]}).
• The Ending Program Counter is PC[23:0] = ({00h, I[7:0], IVECT[7:0]}).
• The interrupt service routine must end with RETI.
Read the LSB of the interrupt vector placed on the internal vectored
interrupt bus, IVECT[7:0], bus by the interrupting peripheral.
• IEF1 ← 0
• IEF2 ← 0
• The Starting Program Counter is effectively {MBASE, PC[15:0]}.
• Push the 2-byte return address, PC[15:0], onto the SPL stack.
• Push a 02h byte onto the SPL stack to indicate an interrupt from Z80
• Set the ADL mode bit to 1.
• The interrupt vector address is {00h, I[7:0], IVECT[7:0]}.
• PC[23:0] ← ({00h, I[7:0], IVECT[7:0]}).
• The Ending Program Counter is PC[23:0] = ({00h, I[7:0], IVECT[7:0]}).
• The interrupt service routine must end with RETI.L
({MBASE, I[7:0], IVECT[7:0]})
mode (because ADL = 0).
Table 75. Vectored Interrupt Operation
PRELIMINARY
eZ80190 Product Specification
Interrupt Controller
137