Z
ILOG
M
ICROPROCESSOR
P
RODUCT
S
PECIFICATION
Z380
™
M
ICROPROCESSOR
FEATURES
s
Static CMOS Design with Low-Power Standby Mode
Option
32-Bit Internal Data Paths and ALU
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Two-Clock Cycle Instruction Execution Minimum
Four Banks of On-Chip Register Files
Enhanced Interrupt Capabilities, Including
16-Bit Vector
Undefined Opcode Trap for Z380
™
Instruction Set
On-Chip I/O Functions:
- Six-Memory Chip Selects with Programmable Waits
- Programmable I/O Waits
- DRAM Refresh Controller
100-Pin QFP Package
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Operating Frequency
- DC-to-18 MHz at 5V
- DC-to-10 MHz at 3.3V
Enhanced Instruction Set that Maintains Object-Code
Compatibility with Z80
®
and Z180
™
Microprocessors
16-Bit (64K) or 32-Bit (4G) Linear Address Space
16-Bit Data Bus with Dynamic Sizing
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GENERAL DESCRIPTION
The Z380
™
Microprocessor is an integrated high-
performance microprocessor with fast and efficient through-
put and increased memory addressing capabilities. The
Z380
™
offers a continuing growth path for present Z80-or
Z180-based designs, while maintaining Z80
®
CPU and
Z180
®
MPU object-code compatibility. The Z380
™
MPU
enhancements include an improved 280 CPU, expanded
4-Gbyte space and flexible bus interface timing.
An enhanced version of the Z80 CPU is key to the Z380
MPU. The basic addressing modes of the Z80 micropro-
cessor have been augmented as follows: Stack Pointer
Relative loads and stores, 16-bit and 24-bit indexed off-
sets, and more flexible Indirect Register addressing, with
all of the addressing modes allowing access to the entire
32-bit address space. Additions made to the instruction
set, include a full complement of 16-bit arithmetic and
logical operations, 16-bit I/O operations, multiply and
divide, plus a complete set of register-to-register loads
and exchanges.
The expanded basic register file of the Z80 MPU micropro-
cessor includes alternate register versions of the IX and IY
registers. There are four sets of this basic Z80 micropro-
cessor register file present in the Z380 MPU, along with the
necessary resources to manage switching between the
different register sets. All of the register-pairs and index
registers in the basic Z80 microprocessor register file are
expanded to 32 bits.
PS010001-0301
ZILOG [ ZILOG, INC. ]
