M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 94

• Manufacturer Part Number: M30622MA-XXXFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
• Manufacturer: RENESAS [Renesas Technology Corp]

DMAC
Figure 1.16.5. Example of the transfer cycles for a source read
(1) 8-bit transfers
(2) 16-bit transfers and the source address is odd
(3) One wait is inserted into the source read under the conditions in (1)
(4) One wait is inserted into the source read under the conditions in (2)
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).
CPU use
CPU use
CPU use
CPU use
CPU use
CPU use
CPU use
CPU use
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
CPU use
CPU use
Dummy
cycle
CPU use
Dummy
cycle
CPU use
CPU use
CPU use
CPU use
CPU use
Mitsubishi microcomputers
M16C / 62 Group
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