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4.10.2 Data space
The V850E/MS1 incorporates an address misalign function.
Through this function, regardless of the data format (word data, halfword data), data can be placed in all
addresses. However, in the case of word data and halfword data, if data is not subject to boundary alignment, the bus
cycle will be generated at least 2 times and bus efficiency will drop.
(1) In the case of halfword length data access
When the address's lowest bit is a 1, the byte length bus cycle will be generated 2 times.
(2) In the case of word length data access
(a) When the address's lowest bit is a 1, bus cycles will be generated in the order of byte length bus cycle,
halfword length bus cycle, and byte length bus cycle.
(b) When the address's lower 2 bits are 10, the halfword length bus cycle will be generated 2 times.
CHAPTER 4 BUS CONTROL FUNCTION
User's Manual U12688EJ4V0UM00
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