參數(shù)資料
型號: Z86E43
廠商: ZiLOG, Inc.
英文描述: CMOS Z8 OTP Microcontroller(CMOS Z8系列一次可編程微控制器)
中文描述: 檢察官辦公室的CMOS Z8微控制器(的CMOS Z8系列一次可編程微控制器)
文件頁數(shù): 34/58頁
文件大?。?/td> 388K
代理商: Z86E43
Z86E33/733/E34/E43/743/E44
CMOS Z8 OTP Microcontrollers
Zilog
34
P R E L I M I N A R Y
DS97Z8X1500
FUNCTIONAL DESCRIPTION
(Continued)
EPROM Protect.
When in ROM Protect Mode, and exe-
cuting out of External Program Memory, instructions LDC,
LDCI, LDE, and LDEI cannot read Internal Program Mem-
ory.
When in EPROM Protect Mode and executing out of Inter-
nal Program Memory, instructions LDC, LDCI, LDE, and
LDEI can read Internal Program Memory.
Data Memory
(/DM). In ROM Mode, the
Z86E43/743/E44
can address up to 60/56/48 KB of external data memory
beginning at location 4096/8192/16384. In ROMless
mode, the
Z86E43/743/E44
can address up to 64 KB of data
memory. External data memory may be included with, or
separated from, the external program memory space.
/DM, an optional I/O function that can be programmed to
appear on pin P34, is used to distinguish between data
and program memory space (Figure 23). The state of the
/DM signal is controlled by the type of instruction being ex-
ecuted. An LDC opcode references PROGRAM (/DM inac-
tive) memory, and an LDE instruction references data
(/DM active Low) memory.
Figure 23. Data Memory Map
65535
4096/8192/16384
0
External
Data
Memory
Not Addressable
External
Data
Memory
EPROM
ROMless Mode
4095/8191/16383
(Z86E43/743/E44 Only)
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