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參數(shù)資料
| 型號(hào)： | M30610M8A |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單片16位CMOS微機(jī) |
| 文件頁(yè)數(shù)： | 61/197頁(yè) |
| 文件大?。?/td> | 2673K |
| 代理商： | M30610M8A |
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Mitsubishi microcomputers
M16C / 61 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
DMAC
61
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
AA
Data bus low-order bits
DMA latch high-order bits
DMA latch low-order bits
AA
AA
DMA0 forward address pointer (20) (Note)
Data bus high-order bits
A
A
A
AAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAA
AA
AA
AA
AA
DMA1 forward address pointer (20) (Note)
A
A
DMA0 transfer counter reload register TCR0 (16)
DMA0 transfer counter TCR0 (16)
DMA1 transfer counter reload register TCR1 (16)
DMA1 transfer counter TCR1 (16)
(addresses 0029
16
, 0028
16
(addresses 0039
16
, 0038
16
16
to 0020
16
)
(addresses 0026
16
to 0024
16
)
(addresses 0032
16
to 0030
16
)
(addresses 0036
16
to 0034
16
)
Note: Pointer is incremented by a DMA request.
AA
AA
A
Figure 1.15.1. Block diagram of DMAC
DMAC
This microcomputer has two DMAC (direct memory access controller) channels that allow data to be sent to
memory without using the CPU. DMAC shares the same data bus with the CPU. The DMAC is given a
higher right of using the bus than the CPU, which leads to working the cycle stealing method. On this
account, the operation from the occurrence of DMA transfer request signal to the completion of 1-word (16-
bit) or 1-byte (8-bit) data transfer can be performed at high speed. Figure 1.15.1 shows the block diagram
of the DMAC. Table 1.15.1 shows the DMAC specifications. Figure 1.15.2 to Figure 1.15.3 show the regis-
ters used by the DMAC.
Either a write signal to the software DMA request bit or an interrupt request signal is used as a DMA transfer
request signal. But the DMA transfer is affected neither by the interrupt enable flag (I flag) nor by the
interrupt priority level. The DMA transfer doesn't affect any interrupts either.
If the DMAC is active (the DMA enable bit is set to 1), data transfer starts every time a DMA transfer request
signal occurs. If the cycle of the occurrences of DMA transfer request signals is higher than the DMA
transfer cycle, there can be instances in which the number of transfer requests doesn't agree with the
number of transfers. For details, see the description of the DMA request bit.
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| M30610MAA | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30610MCA | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30612E4 | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30612M4-152FP | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30612M4A | SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M30610M8A-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30610M8A-XXXGP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30610MAA | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30610MAA-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M30610MAA-XXXGP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
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