Z84C2008PEG Zilog, Z84C2008PEG Datasheet - Page 73

• 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

UM008005-0205
Loading a memory location using indexed addressing for the destination
and immediate addressing for the source requires four bytes. For example,
LD (IX - 15), 21H
appears as:
Notice that with any indexed addressing the displacement always follows
directly after the Op Code.
Table 7 specifies the 16-bit load operations. The extended addressing
feature covers all register pairs. Register indirect operations specifying
the stack pointer are the
these instructions is
that the stack pointer is automatically decremented and incremented as
each byte is pushed onto or popped from the stack respectively. For
example, the instruction
Op Code of
Decrement SP
LD (SP), A
Decrement SP
LD (SP), F
The external stack now appears as:
Address A
A+1
A+2
A+3
DD
F1
36
21
F5H
Op Code
One or Two Bytes
Displacement (-15 in Signed
Two’s Complement
Operand to Load
. During execution, this sequence is generated:
PUSH
PUSH
PUSH AF
and
POP
and
. These differ from other 16-bit loads in
POP
is a single byte instruction with the
instructions. The mnemonic for
Z80 CPU Instruction Description
User’s Manual
Z80 CPU
53