Z84C9008VSG Zilog, Z84C9008VSG Datasheet - Page 273

• Manufacturer Part Number: Z84C9008VSG
• Description: IC 8MHZ Z80 KIO 84-PLCC
• Manufacturer: Zilog
• Series: Z80r

Specifications of Z84C9008VSG

• Processor Type: Z80
• Features: Serial/Parallel Input/Output, Counter/Timer Circuit
• Speed: 8MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 84-LCC (J-Lead)
• Maximum Operating Temperature: + 70 C
• Minimum Operating Temperature: 0 C
• Mounting Style: SMD/SMT
• Cpu Speed: 8MHz
• Digital Ic Case Style: LCC
• No. Of Pins: 84
• Supply Voltage Range: 5V
• Operating Temperature Range: 0°C To +70°C
• Svhc: No SVHC (18-Jun-2010)
• Rohs Compliant: Yes
• Base Number: 84
• Clock Frequency: 8MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Operation:
Op Code:
Operands:
Description: This instruction is similar to the conditional jump instructions except that
Condition Bits Affected: None
UM008005-0205
-
DJNZ
e
a register value is used to determine branching. The B register is
decremented, and if a non zero value remains, the value of the
displacement
instruction is fetched from the location designated by the new contents of
the PC. The jump is measured from the address of the instruction Op
Code and has a range of -126 to +129 bytes. The assembler automatically
adjusts for the twice incremented PC.
If the result of decrementing leaves B with a zero value, the next instruction
executed is taken from the location following this instruction.
if B ≠ 0:
If B = 0:
0
0
M Cycles
M Cycles
0
3
2
e
is added to the Program Counter (PC). The next
e-2
1
0
DJNZ, e
0
13 (5,3, 5)
T States
T States
8 (5, 3)
0
0
10
4 MHz E.T.
4 MHz E.T.
3.25
2.00
Z80 Instruction Set
User’s Manual
Z80 CPU
253