參數(shù)資料
型號(hào): M30302M8L-XXXFP
元件分類: 微控制器/微處理器
英文描述: 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100
封裝: 14 X 20 MM, PLASTIC, QFP-100
文件頁數(shù): 137/165頁
文件大?。?/td> 2188K
代理商: M30302M8L-XXXFP
Mitsubishi microcomputers
M16C / 30L Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
DMAC
73
Single-chip mode
Memory expansion mode
Transfer unit
Bus width
Access address
Microprocessor mode
No. of read
No. of write
No. of read No. of write
cycles
16-bit
Even
1111
8-bit transfers
(BYTE= “L”)
Odd
1111
(DMBIT= “1”)
8-bit
Even
1
(BYTE = “H”)
Odd
1
16-bit
Even
1111
16-bit transfers
(BYTE = “L”)
Odd
2222
(DMBIT= “0”)
8-bit
Even
2
(BYTE = “H”)
Odd
2
Table 1.13.2. No. of DMAC transfer cycles
Internal memory
External memory
Internal ROM/RAM
SFR area
Separate bus
Multiplex
No wait
With wait
No wait
With wait
bus
12
2
1
2
3
Coefficient j, k
(2) DMAC transfer cycles
Any combination of even or odd transfer read and write addresses is possible. Table 1.13.2 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
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