Z84C2008PEG Zilog, Z84C2008PEG Datasheet - Page 277

• 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

Operation:
Op Code:
Operands:
Description: If condition
UM008005-0205
IF cc true: (sp-1) ← PCH
(sp-2) ← PCL, pc ← nn
CALL
cc, nn
Program Counter (PC) onto the top of the external memory stack, then
loads the operands
first Op Code of a subroutine is to be fetched. At the end of the subroutine,
a RETurn instruction can be used to return to the original program flow by
popping the top of the stack back to PC. If condition
Program Counter is incremented as usual, and the program continues with
the next sequential instruction. The stack push is accomplished by first
decrementing the current contents of the Stack Pointer (SP), loading the
high-order byte of the PC contents to the memory address now pointed to
by SP; then decrementing SP again, and loading the low order byte of the
PC contents to the top of the stack.
Because this is a 3-byte instruction, the Program Counter was incremented
by three before the push is executed.
Condition
condition bits in the Flag Register (register F). These eight status are
1
1
Note: The first of the two n operands in the assembled object code
above is the least-significant byte of the 2-byte memory address.
cc
cc
is programmed as one of eight status that corresponds to
is true, this instruction pushes the current contents of the
cc
n
n
nn
CALL cc, nn
to PC to point to the address in memory where the
1
0
0
cc
Z80 Instruction Set
is false, the
User’s Manual
Z80 CPU
257