M30622M4 MITSUBISHI [Mitsubishi Electric Semiconductor], M30622M4 Datasheet - Page 78

• Manufacturer Part Number: M30622M4
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

DMAC
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Figure 1.16.5. Example of the transfer cycles for a source read
(1) 8-bit transfers
(4) One wait is inserted into the source read under the conditions in (2)
(2) 16-bit transfers and the source address is odd
(3) One wait is inserted into the source read under the conditions in (1)
BCLK
WR signal
BCLK
WR signal
BCLK
WR signal
BCLK
WR signal
Address
bus
RD signal
Data
bus
Address
bus
RD signal
Data
bus
Address
bus
RD signal
Data
bus
Address
bus
RD signal
Data
bus
16-bit transfers from even address and the source address is even.
(When 16-bit data is transferred on an 8-bit data bus, there are two destination write cycles).
Note: The same timing changes occur with the respective conditions at the destination as at the source.
Transferring 16-bit data on an 8-bit data bus (In this case, there are also two destination write cycles).
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Source
Source
Source
Source
Source
Source
Destination
Source + 1
Source
Source
Destination
Source + 1
Destination
Destination
Dummy
cycle
Destination
Destination
Dummy
cycle
Source + 1
Source + 1
Dummy
cycle
Dummy
cycle
Dummy
cycle
Dummy
cycle
Destination
Destination
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
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Dummy
cycle
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Dummy
cycle
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Mitsubishi microcomputers
M16C / 62 Group