ez80l92 ZiLOG Semiconductor, ez80l92 Datasheet - Page 52

• Manufacturer Part Number: ez80l92
• Description: Ez80acclaim Flash Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Table 12. Vectored Interrupt Operation (Continued)
PS013014-0107
Memory
Mode
ADL Mode
Z80 Mode
ADL
Bit
1
0
MADL
Bit
0
1
Operation
Read the LSB of the interrupt vector placed on the internal vectored
interrupt bus, IVECT [7:0], by the interrupting peripheral.
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Read the LSB of the interrupt vector placed on the internal vectored
interrupt bus, IVECT[7:0], bus by the interrupting peripheral.
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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 located at { 00h, I[7:0], IVECT[7:0] }.
PC[15:0] ← ( { 00h, I[7:0], IVECT[7:0] } ).
The ending Program Counter is { 00h, PC[15:0] }.
The interrupt service routine must end with RETI.
IEF1
IEF2
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 00h byte onto the SPL stack to indicate an interrupt from Z80
mode (because ADL = 0).
Set the ADL mode bit to 1.
The interrupt vector address is located at { 00h, I[7:0], IVECT[7:0] }.
PC[15:0] ← ( { 00h, I[7:0], IVECT[7:0] } ).
The ending Program Counter is { 00h, PC[15:0] }.
The interrupt service routine must end with RETI.L
←
←
0
0
Product Specification
Interrupt Controller
eZ80L92 MCU
®
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