EZ80F920120MOD Zilog, EZ80F920120MOD Datasheet - Page 61

• Manufacturer Part Number: EZ80F920120MOD
• Description: MODULE EZ80F92 512K 20MHZ
• Manufacturer: Zilog

Specifications of EZ80F920120MOD

• Module/board Type: Development Module
• Processor Series: EZ80F92x
• Core: eZ80
• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 1 MB
• Interface Type: Cable
• Maximum Clock Frequency: 20 MHz
• Operating Supply Voltage: 0 V to 3.3 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Package / Case: LQFP
• Development Tools By Supplier: eZ80F920200ZCOG
• Minimum Operating Temperature: 0 C
• For Use With/related Products: eZ80F92
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 269-3157; EZ80F920120MOD

Table 12. Vectored Interrupt Operation (Continued)
PS015308-0404
Memory
Mode
Z80 Mode
ADL Mode
Nonmaskable Interrupts
ADL
Bit
0
1
An active Low input on the NMI pin generates an interrupt request to the CPU. This non-
maskable interrupt is always serviced by the CPU regardless of the state of the Interrupt
Enable flags (IEF1 and IEF2). The nonmaskable interrupt is prioritized higher than all
maskable interrupts. The response of the CPU to a nonmaskable interrupt is described in
detail in the eZ80 CPU User Manual (UM0077).
MADL
Bit
1
1
Operation
Read the LSB of the interrupt vector placed on the internal vectored
interrupt bus, IVECT[7:0], bus by the interrupting peripheral.
•
•
•
•
•
•
•
•
•
•
Read the LSB of the interrupt vector placed on the internal vectored
interrupt bus, IVECT [7:0], by the interrupting peripheral.
•
•
•
•
•
•
•
•
•
•
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]
The ending Program Counter is {00h, PC[15:0]}
The interrupt service routine must end with RETI.L
IEF1
IEF2
The Starting Program Counter is PC[23:0]
Push the 3-byte return address, PC[23:0], onto the SPL stack
Push a 01h byte onto the SPL stack to indicate a restart from ADL mode
(because ADL = 1)
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]
The ending Program Counter is {00h, PC[15:0]}
The interrupt service routine must end with RETI.L
0
0
0
0
P R E L I M I N A R Y
({00h, I[7:0], IVECT[7:0]})
({00h, I[7:0], IVECT[7:0]})
Product Specification
eZ80F92/eZ80F93
Interrupt Controller
49