- 您现在的位置：买卖IC网 > PDF目录69009 > M306H7MG-XXXFP 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100 PDF资料下载
参数资料
| 型号： | M306H7MG-XXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 16-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP100 |
| 封装： | 14 X 20 MM, 0.65 MM PITCH, PLASTIC, QFP-100 |
| 文件页数： | 151/180页 |
| 文件大小： | 2820K |
| 代理商： | M306H7MG-XXXFP |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页第44页第45页第46页第47页第48页第49页第50页第51页第52页第53页第54页第55页第56页第57页第58页第59页第60页第61页第62页第63页第64页第65页第66页第67页第68页第69页第70页第71页第72页第73页第74页第75页第76页第77页第78页第79页第80页第81页第82页第83页第84页第85页第86页第87页第88页第89页第90页第91页第92页第93页第94页第95页第96页第97页第98页第99页第100页第101页第102页第103页第104页第105页第106页第107页第108页第109页第110页第111页第112页第113页第114页第115页第116页第117页第118页第119页第120页第121页第122页第123页第124页第125页第126页第127页第128页第129页第130页第131页第132页第133页第134页第135页第136页第137页第138页第139页第140页第141页第142页第143页第144页第145页第146页第147页第148页第149页第150页当前第151页第152页第153页第154页第155页第156页第157页第158页第159页第160页第161页第162页第163页第164页第165页第166页第167页第168页第169页第170页第171页第172页第173页第174页第175页第176页第177页第178页第179页第180页
Rev.2.10
Oct 25, 2006
Page 70 of 326
REJ03B0152-0210
M306H7MG-XXXFP/MC-XXXFP/FGFP
8. DMAC
8.3
DMA Enable
When a data transfer starts after setting the DMAE bit in DMiCON register (i = 0, 1) to “1” (enabled), the DMAC
operates as follows:
(1) Reload the forward address pointer with the SARi register value when the DSD bit in DMiCON register is “1”
(forward) or the DARi register value when the DAD bit of DMiCON register is “1” (forward).
(2) Reload the DMAi transfer counter with the DMAi transfer counter reload register value.
If the DMAE bit is set to “1” again while it remains set, the DMAC performs the above operation. However, if a
DMA request may occur simultaneously when the DMAE bit is being written, follow the steps below.
Step 1: Write “1” to the DMAE bit and DMAS bit in DMiCON register simultaneously.
Step 2: Make sure that the DMAi is in an initial state as described above (1) and (2) in a program.
If the DMAi is not in an initial state, the above steps should be repeated.
8.4
DMA Request
The DMAC can generate a DMA request as triggered by the cause of request that is selected with the DMS and
DSEL3 to DSEL0 bits of DMiSL register (i = 0, 1) on either channel. Table 8.4 shows the timing at which the
DMAS bit changes state.
Whenever a DMA request is generated, the DMAS bit is set to “1” (DMA requested) regardless of whether or not
the DMAE bit is set. If the DMAE bit was set to “1” (enabled) when this occurred, the DMAS bit is set to “0”
(DMA not requested) immediately before a data transfer starts. This bit cannot be set to “1” in a program (it can
only be set to “0”).
The DMAS bit may be set to “1” when the DMS or the DSEL3 to DSEL0 bits change state. Therefore, always be
sure to set the DMAS bit to “0” after changing the DMS or the DSEL3 to DSEL0 bits.
Because if the DMAE bit is “1”, a data transfer starts immediately after a DMA request is generated, the DMAS bit
in almost all cases is “0” when read in a program. Read the DMAE bit to determine whether the DMAC is enabled.
Table 8.4
Timing at Which the DMAS Bit Changes State
DMA factor
Software trigger
Peripheral function
Timing at which the bit is set to “1”
Timing at which the bit is set to “0”
DMAS bit of the DMiCON register
When the DSR bit of DMiSL
register is set to “1”
When the interrupt control register
for the peripheral function that is
selected by the DSEL3 to DSEL0
and DMS bits of DMiSL register
has its IR bit set to “1”
Immediately before a data transfer starts
When set by writing “0” in a program
相关PDF资料 |
PDF描述 |
|---|---|
| M306H7FGFP | 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP100 |
| M306K7F8LRP | 16-BIT, FLASH, 8 MHz, MICROCONTROLLER, PQFP144 |
| M306K9FCLRP | 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP144 |
| M306K9F8LRP | 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP144 |
| M306KAFCLRP | 16-BIT, FLASH, 16 MHz, MICROCONTROLLER, PQFP144 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| M306K7F8LRP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M306K9FCLRP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M306K9T2-CPE | 功能描述:M-SUPPORT TOOL RoHS:否 类别:编程器，开发系统 >> 内电路编程器、仿真器以及调试器 系列:- 产品变化通告:Development Systems Discontinuation 19/Jul/2010 标准包装:1 系列:* 类型:* 适用于相关产品:* 所含物品:* |
| M306KAFCLRP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER Description |
| M306N0FG | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
发布紧急采购，3分钟左右您将得到回复。