Z84C2008PEG Zilog, Z84C2008PEG Datasheet - Page 96

• 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

76
UM008005-0205
Z80 CPU
User’s Manual
Z80 Status Indicator Flags
The flag registers (F and F') supply information to the user about the status
of the Z80 at any given time. The bit positions for each flag is listed below:
Each of the two flag registers contains 6 bits of status information that are
set or cleared by CPU operations. (Bits 3 and 5 are not used.) Four of these
bits (C, P/V, Z, and S) may be tested for use with conditional
or
for BCD arithmetic.
Carry Flag
The Carry Flag (C) is set or cleared depending on the operation performed.
For
generate a Borrow, the Carry Flag sets. The Carry Flag is reset by an
instruction that does not generate a Carry, and by a
does not generate a Borrow. This saved Carry facilitates software routines
Symbol
C
N
P/V
H
Z
S
X
7
S
RETURN
ADD
instructions that generate a Carry, and
6
Z
Field Name
Carry Flag
Add/Subtract
Parity/Overflow Flag
Half Carry Flag
Zero Flag
Sign Flag
Not Used
instructions. Two flags may not be tested (H, N) and are used
5
X
4
N
3
X
SUB
2
P/V
SUB
instructions that
Z80 Instruction Set
instruction that
1
N
JUMP
0
C
,
CALL
ADD
,