DSIM2918 PLC/DCS系统模块
特定功能产品规格
寄存器模式寄存器 自动初始化禁用1自动初始化启用0地址增量选择1地址递减选择00需求模式选择01单模式选择10块模式选择11级联模式选择D7D6 D5 D4 D3 D2 D1 D0操作模式 需求模式 DMA持续，直到外部EOP给出或只要DREQ输入有效 单一模式 HOLD信号在传输一个字节后被撤回。如果DREQ线继续有效，DMAC再次通过HOLD请求请求下一个字节传输。 块模式： 传输数据块。当终端计数为零时，传输停止 级联模式： 系统请求寄存器D7 D6 D5 D4 D3 D2 D1 D0 00 SELECT CHANNEL 0 01 SELECT CHANNEL 1 10 SELECT CHANNEL 2 11 SELECT CHINEL 3 0 RESET Request BIT 1 SET Request BIT DON’T CARE Mask寄存器D7 D1 D6 D4 D4 D1 D3 D1 D00 SELECT CHANNEL 0 Mask BIT 01 SELECT CHANNEL 1 Mask BIT 10 SELECTCH CHANNEL 2 Mask比特11 SELECT CHANNEL 3 Mask位0 CLEAR Mask BIT 1 SET Mask比特不在乎掩码寄存器设置掩码比特状态寄存器的替代方法谢谢！
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Specific functional product specifications
Register mode Register automatic initialization is disabled 1 Automatic initialization is enabled 0 Address increment selection 1 Address decrement selection 00 Demand mode selection 01 Single mode selection 10 Block mode selection 11 Cascade mode selection D7D6 D5 D4 D3 D2 D1 D0 Operation mode • Demand mode • DMA continues until the external EOP gives or as long as the DREQ input is valid • Single mode • HOLD signal is withdrawn after transmitting a byte. If the DREQ line continues to be valid, DMAC requests the next byte transmission through the HOLD request again. • Block mode: • Transfer data blocks. When the terminal count is zero, Transmission stop • Cascade mode: • System request register D7 D6 D5 D4 D3 D2 D1 D0 00 SELECT CHANNEL 0 01 SELECT CHANNEL 1 10 SELECT CHANNEL 2 11 SELECT CHINEL 3 0 RESET Request BIT 1 SET Request BIT DON'T CARE Mask register D7 D1 D6 D4 D1 D3 D1 D00 SELECT CHANNEL 0 Mask BIT 01 SELECT CHANNEL 1 Mask BIT 10 SELECT CHANNEL 2 Mask bit 11 SELECT CHANNEL 3 Mask bit 0 CL. EAR Mask BIT 1 SET Mask Bit I don't care about the alternative of mask register setting mask bit status register. Thank you! For more comments, follow e ardware version 5.1 and installation precautions This document contains information about one or more ABB products, which may include descriptions or references to one or more standards, which are usually related to ABB products. Protect the application of the intellectual property rights of ABB products described in this publication. The existence of any such standard description or standard reference does not mean that all ABB products referenced in this document support all features of the said or referenced standards. To determine the specific functions supported by specific ABB products.
