M16C62A Datasheet, PDF (65/242 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

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Mitsubishi microcomputers
M16C / 62A Group (80-pin)
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(1) 16-bit transfers from even address and the source address is even.
BCLK
Address
bus
RD signal
CPU use
Source
Destination
Dummy
cycle
CPU use
WR signal
Data
bus
CPU use
Source
Destination
Dummy
cycle
CPU use
(2) 16-bit transfers and the source address is odd
BCLK
Address
bus
CPU use
Source
Source + 1 Destination
Dummy
cycle
RD signal
WR signal
Data
bus
CPU use
Source
Source + 1 _Destination
Dummy
cycle
CPU use
CPU use
(3) One wait is inserted into the source read under the conditions in (1)
BCLK
Address
bus
CPU use
Source
Destination
Dummy
cycle
RD signal
WR signal
Data
bus
CPU use
Source
Destination
Dummy
cycle
CPU use
CPU use
(4) One wait is inserted into the source read under the conditions in (2)
BCLK
Address
bus
CPU use
Source
Source + 1
Destination
Dummy
cycle
RD signal
CPU use
WR signal
Data
bus
CPU use
Source
Source + 1
Destination
Dummy
cycle
CPU use
Note: The same timing changes occur with the respective conditions at the destination as at the source.
Figure 1.12.5. Example of the transfer cycles for a source read
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