HD64336901G Renesas Technology, HD64336901G Datasheet - Page 67
HD64336901G
Manufacturer Part Number
HD64336901G
Description
(HD64xxx Series) 16-BIT MICROCONTROLLER
Manufacturer
Renesas Technology
Datasheet
1.HD64336901G.pdf
(408 pages)
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2.8
2.8.1
The address space of this LSI includes empty areas in addition to the ROM, RAM, and on-chip
I/O registers areas available to the user. When data is transferred from CPU to empty areas, the
transferred data will be lost. This action may also cause the CPU to malfunction. When data is
transferred from an empty area to CPU, the contents of the data cannot be guaranteed.
2.8.2
EEPMOV is a block-transfer instruction and transfers the byte size of data indicated by R4L,
which starts from the address indicated by R5, to the address indicated by R6. Set R4L and R6 so
that the end address of the destination address (value of R6
value of R6 must not change from H'FFFF to H'0000 during execution).
2.8.3
The BSET, BCLR, BNOT, BST, and BIST instructions read data from the specified address in
byte units, manipulate the data of the target bit, and write data to the same address again in byte
units. Special care is required when using these instructions in cases where two registers are
assigned to the same address or when a bit is directly manipulated for a port, because this may
rewrite data of a bit other than the bit to be manipulated.
Usage Notes
Notes on Data Access to Empty Areas
EEPMOV Instruction
Bit Manipulation Instruction
R4L) does not exceed H'FFFF (the
Rev. 1.00, 11/03, page 39 of 376
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