Z86E4016KSC データシートの表示（PDF） - Zilog

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Z86E4016KSC

Z8 4K OTP MICROCONTROLLER

Zilog 

Zilog

Z86E30/E31/E40

Z8 4K OTP Microcontroller

EPROM Protect. When in ROM Protect Mode, and exe- location 4096. In ROMless mode, the Z86E40 can address

cuting out of External Program Memory, instructions LDC, up to 64 KB of data memory. External data memory may

1 LDCI, LDE, and LDEI cannot read Internal Program Mem- be included with, or separated from, the external program

ory.

memory space. /DM, an optional I/O function that can be

programmed to appear on pin P34, is used to distinguish

When in ROM Protect Mode and executing out of Internal between data and program memory space (Figure 23).

Program Memory, instructions LDC, LDCI, LDE, and LDEI The state of the /DM signal is controlled by the type of in-

can read Internal Program Memory.

struction being executed. An LDC opcode references

Data Memory (/DM). In EPROM Mode, the Z86E40 can

address up to 60 KB of external data memory beginning at

PROGRAM (/DM inactive) memory, and an LDE instruc-

tion references data (/DM active Low) memory.

65535

EPROM

ROMless

External

Data

Memory

External

Data

Memory

4096

4095

0

Not Addressable

Figure 23. Data Memory Map

DS97Z8X0500

PRELIMINARY

33

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