Z84C9008VSG Zilog, Z84C9008VSG Datasheet - Page 262

• 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

242
Operation:
Op Code:
Operands:
Description: This instruction provides for conditional branching to other segments of a
Condition Bits Affected: None
Example:
UM008005-0205
Z80 CPU
User’s Manual
If C = 0, continue
If C = 1, PC ← PC+ e
JR
C, e
program depending on the results of a test on the Carry Flag. If the flag is
equal to a 1, the value of the displacement e is added to the Program
Counter (PC) and the next 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 flag is equal to a 0, the next instruction executed is taken from the
location following this instruction. If condition is met
If condition is not met:
The Carry flag is set and it is required to jump back four locations from
480. The assembly language statement is
The resulting object code and final PC value is shown below:
0
0
M Cycles
M Cycles
1
3
2
1
e-2
1
JR C, e
0
12 (4, 3, 5)
T States
T States
7 (4, 3)
0
0
38
JR C
,
4 MHz E.T.
4 MHz E.T.
$ - 4
3.00
1.75
Z80 Instruction Set