ez80f91 ZiLOG Semiconductor, ez80f91 Datasheet - Page 47

• Manufacturer Part Number: ez80f91
• Description: Ez80 Acclaimplus!? Connectivity Assp Ez80f91 Assp
• Manufacturer: ZiLOG Semiconductor

eZ80
PS027001-0707
Features
New Instructions
®
CPU Core
The eZ80 CPU is the first 8-bit CPU to support 16 MB linear addressing. Each software
module or task under a real-time executive or operating system operates in Z80
compatible (64 KB) mode or full 24-bit (16 MB) address mode.
The CPU instruction set is a superset of the instruction sets for the Z80 and Z180
Z80 and Z180 programs are executed on an eZ80 CPU with little or no modification.
The eZ80 CPU includes the following features:
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The new instructions are listed below:
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For more information on the CPU, its instruction set, and eZ80 programming, refer to
eZ80 CPU User Manual (UM0077), available on www.zilog.com.
Code-compatible with Z80 and Z180 products.
24-bit linear address space.
Single-cycle instruction fetch.
Pipelined fetch, decode, and execute.
Dual Stack Pointers for ADL (24-bit) and Z80 (16-bit) memory modes.
24-bit CPU registers and Arithmetic Logic Unit (ALU).
Debug support.
Nonmaskable Interrupt (NMI), plus support for 128 maskable vectored interrupts.
Loads/unloads the I register with a 16-bit value. These new instructions are:
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LD I,HL (ED C7)
LD HL,I (ED D7)
Product Specification
eZ80F91 ASSP
eZ80
®
®
CPU Core
®
CPUs.
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