Z84C2008PEG Zilog, Z84C2008PEG Datasheet - Page 46
![IC 8MHZ Z80 CMOS PIO 40-DIP](/photos/6/57/65796/269-40-dip_sml.jpg)
Z84C2008PEG
Manufacturer Part Number
Z84C2008PEG
Description
IC 8MHZ Z80 CMOS PIO 40-DIP
Manufacturer
Zilog
Series
Z80r
Specifications of Z84C2008PEG
Processor Type
Z80
Features
Low Power CMOS
Speed
8MHz
Voltage
5V
Mounting Type
Through Hole
Package / Case
40-DIP (0.620", 15.75mm)
Cpu Speed
8MHz
Digital Ic Case Style
DIP
No. Of Pins
40
Supply Voltage Range
5V
Operating Temperature Range
-40°C To +100°C
Svhc
No SVHC (18-Jun-2010)
Rohs Compliant
Yes
Processor Series
Z84C2xx
Core
Z80
Data Bus Width
8 bit
Maximum Clock Frequency
8 MHz
Number Of Programmable I/os
16
Operating Supply Voltage
0 V to 5 V
Maximum Operating Temperature
+ 100 C
Mounting Style
Through Hole
Minimum Operating Temperature
- 40 C
Base Number
84
Clock Frequency
8MHz
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
Z84C2008PEG
Manufacturer:
Zilog
Quantity:
20
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26
UM008005-0205
Z80 CPU
User’s Manual
Interrupt
Service
Routine
Starting
Address
Table
because the pointer is used to get two adjacent bytes to form a complete 16-
bit service routine starting address and the addresses must always start in
even locations.
Figure 16. Mode 2 Interrupt Response Mode
The first byte in the table is the least-significant (low order portion of the
address). The programmer must complete this table with the correct
addresses before any interrupts are accepted.
The programmer can change this table by storing it in Read/Write Memory,
which also allows individual peripherals to be serviced by different service
routines.
When the interrupting device supplies the lower portion of the pointer, the
CPU automatically pushes the program counter onto the stack, obtains the
starting address from the table, and performs a jump to this address. This
mode of response requires 19 clock periods to complete (seven to fetch the
lower eight bits from the interrupting device, six to save the program
counter, and six to obtain the jump address).
The Z80 peripheral devices include a daisy-chain priority interrupt structure
that automatically supplies the programmed vector to the CPU during
interrupt acknowledge. Refer to the Z80 CPU Peripherals User Manual for
more complete information.
Low Order
High Order
Starting Address
Pointed to by:
I Register
Contents
Seven Bits From
Peripheral
0
Overview
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