FlashFlex MCU
SST89E564RD / SST89V564RD
SST89E554RC / SST89V554RC
EOL Data Sheet
2FFH
FFH
FFH
80H
Expanded
RAM
768 Bytes
(Indirect Addressing)
(Direct Addressing)
Special
Function
Registers
(SFRs)
Upper 128 Bytes
Internal RAM
80H
7FH
Lower 128 Bytes
Internal RAM
(Indirect & Direct
Addressing)
(Indirect Addressing)
000H
00H
FFFFH
FFFFH
(Indirect Addressing)
(Indirect Addressing)
External
Data
Memory
External
Data
Memory
0300H
2FFH
Expanded RAM
000H
0000H
EXTRAM = 0
EXTRAM = 1
1207 F40.3
FIGURE
3-3: INTERNAL AND EXTERNAL DATA MEMORY STRUCTURE
©2007 Silicon Storage Technology, Inc.
S71207-08-EOL
1/07
17
SST [ SILICON STORAGE TECHNOLOGY, INC ]
