MX10E8050I 查看數據表（PDF） - Macronix International
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MX10E8050I Datasheet PDF : 88 Pages
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Table. 2 Internal data memory access
PRELIMINARY
MX10E8050I /
MX10E8050IA
LOCATION
RAM 0 to 127
RAM 128 to 255
AUX-RAM 0 to 1023
Special Function Register (SFR) 128 to 255
ADDRESSED
DIRECT and INDIRECT
INDIRECT only
INDIRECT only with MOVX
DIRECT only
Fig. 1 shows the internal memory address space. Table 3 shows the Special Function Register (SFR) memory
map. Location 0 to 31 at the lower RAM area can be devided into four 8-bit register banks. Only one of these
banks may be enabled at a time. The next 16 bytes, locations 32 through 47, contain 128 directly addressable bit
locations.
The stack can be located anywhere in the internal 256 byte RAM. The stack depth is only limited by the available
internal RAM space of 256 bytes. All registers except the Program Counter and the four 8-byte register banks
reside in the SFR address space.
Five methods to access memory space are as floww :
- Register
- Direct
- Register-Indirect
- Immediate
- Base-Register plus Index-Register-Indirect.
The first three methods can be used for addressing destination operands. Most instructions have a 'destination /
source' field that specifies the data type, addressing methods and operands involved. For operations other than
MOVs, the destination operand is also a source operand.
Access to memory addresses is as follows:
- Register in one of the four 8-byte register banks through Direct or Register-Indirect addressing.
- 256 bytes of internal RAM through Direct or Register-Indirect addressing. Bytes 0-127 of internal RAM may be
only be addressed indirectly as data RAM.
- SFR through direct addressing at address location 128-255.
OVERLAPPED SPACE with different access schemes
64k
255
FLASH memory
127
0
Indirect
Only
SFRs
direct only
Direct and
Indirect
MAIN RAM
SFRs
1023
AUXILIARY
RAM
through
MOVX access
0
AUX-RAM
INTERNAL PROGRAM MEMORY
INTERNAL DATA MEMORY
Fig.1 Internal program and data memory address space
P/N:PM0887 Specifications subject to change without notice, contact your sales representatives for the most update information. REV. 1.6, MAR. 28, 2005
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