Z84C2008PEG Zilog, Z84C2008PEG Datasheet - Page 283
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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Operation:
Op Code:
Description: This instruction is used at the end of a maskable interrupt service routine to:
Condition Bits Affected: None
Example:
UM008005-0205
Return from Interrupt
RETI
•
•
Given: Two interrupting devices, with A and B connected in a daisy-chain
configuration and A having a higher priority than B.
+
1
INT
0
Restore the contents of the Program Counter (PC) (analogous to the
RET instruction)
Signal an I/O device that the interrupt routine is completed. The
instruction also facilitates the nesting of interrupts, allowing higher
priority devices to temporarily suspend service of lower priority
service routines. However, this instruction does not enable interrupts
that were disabled when the interrupt routine was entered. Before
doing the
should be executed to allow recognition of interrupts after completion
of the current service routine.
IEI
1
1
M Cycles
A
1
0
4
RETI
IEO
0
0
instruction, the enable interrupt instruction (
1
1
RETI
14 (4, 4, 3, 3)
1
1
T States
IEI
0
0
B
1
1
IEO
ED
4D
4 MHz E.T.
3.50
Z80 Instruction Set
User’s Manual
Z80 CPU
EI
)
RETI
263
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