W79E225A_08 Datasheet, PDF (15/203 Pages) Winbond – 8-bit Microcontroller

Preliminary W79E225A/226A/227A Data Sheet
Read
access
Write
access
MOVX A, @DPTR (Read)
MOVX A, @R0 (Read)
MOVX A, @R1 (Read)
ADDR ≤ 1K
NVM¹
NVM²
NVM²
MOVX @DPTR, A (Write)
NOP
MOVX @R0, A (Write)
NOP
MOVX @R1, A (Write)
NOP
Table 6-2: W79E225 MOVX read/write access destination
ADDR > 1K
Ext memory¹
NOP
NOP
Ext memory¹
NOP
NOP
ENNVM = 1
INSTRUCTIONS
NVM SIZE = SRAM (2K)
Read
access
Write
access
MOVX A, @DPTR (Read)
MOVX A, @R0 (Read)
MOVX A, @R1 (Read)
MOVX @DPTR, A (Write)
MOVX @R0, A (Write)
MOVX @R1, A (Write)
ADDR ≤ 2K
NVM¹
NVM²
NVM²
NOP
NOP
NOP
ADDR > 2K
Ext memory¹
NOP
NOP
Ext memory¹
NOP
NOP
Note:
1. A15~A0=DPTR
2. A15~A8=XRAMAH
Table 6-3: W79E226/227 MOVX read/write access destination
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Publication Release Date: April 15, 2008
Revision A4.0