M306H2MC-XXXFP Datasheet, PDF (71/210 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with DATA ACQUISITION CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306H2MC-XXXFP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
with DATA ACQUISITION CONTROLLER
(2) DMAC transfer cycles
Any combination of even or odd transfer read and write addresses is possible. Table 2.9.2 shows the
number of DMAC transfer cycles.
The number of DMAC transfer cycles can be calculated as follows:
No. of transfer cycles per transfer unit = No. of read cycles x j + No. of write cycles x k
Table 2.9.2 No. of DMAC transfer cycles
Transfer unit
8-bit transfers
(DMBIT= “1”)
16-bit transfers
(DMBIT= “0”)
Bus width
16-bit
(BYTE= “L”)
8-bit
(BYTE = “H”)
16-bit
(BYTE = “L”)
8-bit
(BYTE = “H”)
Single-chip mode
Memory expansion mode
Microprocessor mode
Access address _{No. of read No. of write No. of read No. of write}
cycles
cycles
cycles
cycles
Even
1
1
1
1
Odd
1
1
1
1
Even
–
–
1
1
Odd
–
–
1
1
Even
1
1
1
1
Odd
2
2
2
2
Even
–
–
2
2
Odd
–
–
2
2
Coefficient j, k
Internal memory
Internal ROM/RAM Internal ROM/RAM
No wait
With wait
1
2
SFR area
2
External memory
Separate bus Separate bus
No wait
With wait
1
2
Multiplex
bus
3
Rev. 1.0
70