Z86E4016PSC View Datasheet(PDF) - Zilog
Part Name
Description
MFG CO.
'Z86E4016PSC' PDF : 66 Pages View PDF
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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