Z84C9008VSG Zilog, Z84C9008VSG Datasheet - Page 70

• 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

50
UM008005-0205
Z80 CPU
User’s Manual
Table 6 defines the Op Code for all the 8-bit load instructions
implemented in the Z80 CPU. Also described in this table is the type of
addressing used for each instruction. The source of the data is found on
the top horizontal row and the destination is specified in the left column.
For example, load register C from register B uses the Op Code
the figures, the Op Code is specified in hexadecimal notation and the
(
memory during M1 time, decoded, and then the register transfer is
automatically performed by the CPU.
The assembly language mnemonic for this entire group is LD, followed
by the destination, followed by the source (LD DEST, SOURCE). Note
that several combinations of addressing modes are possible. For example,
the source may use register addressing and the destination may be register
indirect; such as load the memory location pointed to by register HL with
the contents of register D. The Op Code for this operation is
mnemonic for this load instruction is
The parentheses around the HL indicates that the contents of HL are used
as a pointer to a memory location. In all Z80 load instruction mnemonics,
the destination is always listed first, with the source following. The Z80
assembly language is defined for ease of programming. Every instruction
is self documenting and programs written in Z80 language are easy to
maintain.
In Table 6, some Op Codes that are available in the Z80 use two bytes.
This feature is an efficient method of memory utilization because 8-, 18-,
24-, or 32-bit instructions are implemented in the Z80. Often utilized
instructions such as arithmetic or logical operations are only eight bits,
which results in better memory utilization than is achieved with fixed
instruction sizes such as 16 bits.
0100 1000
binary) code is fetched by the CPU from the external
LD
Z80 CPU Instruction Description
(
HL
),
D
.
72
48H
. The
. In all
48H