M30622 Mitsubishi, M30622 Datasheet - Page 79
M30622
Manufacturer Part Number
M30622
Description
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Manufacturer
Mitsubishi
Datasheet
1.M30622.pdf
(184 pages)
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DMAC
Table 1.16.2. No. of DMAC transfer cycles
Note 1: M30623(80-pin package), in case of access to the external bus area, can be used only when 8-bit
(2) DMAC transfer cycles
8-bit transfers
(DMBIT= “1”)
16-bit transfers
(DMBIT= “0”)
Transfer unit
Any combination of even or odd transfer read and write addresses is possible. Table 1.16.2 shows the
number of DMAC transfer cycles.
The number of DMAC transfer cycles can be calculated as follows:
Coefficient j, k
Internal ROM/RAM
bus mode.
No wait
No. of transfer cycles per transfer unit = No. of read cycles x j + No. of write cycles x k
1
(BYTE = “H”)
(BYTE = “H”)
(BYTE = “L”)
(BYTE= “L”)
Internal memory
Bus width
16-bit
16-bit
8-bit
8-bit
Internal ROM/RAM
With wait
2
Access address
Even
Even
Even
Even
Odd
Odd
Odd
Odd
SFR area
2
79
No. of read No. of write No. of read No. of write
cycles
Single-chip mode
—
—
—
—
1
1
1
2
Separate bus
No wait
1
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
cycles
—
—
—
—
1
1
1
2
External memory
Separate bus
With wait
Memory expansion mode
Microprocessor mode
Mitsubishi microcomputers
2
cycles
1
1
1
1
1
2
2
2
M16C / 62T Group
Multiplex
bus
cycles
3
1
1
1
1
1
2
2
2