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DSPIC33FJ64GP706 数据表(PDF) 131 Page - Microchip Technology |
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DSPIC33FJ64GP706 数据表(HTML) 131 Page - Microchip Technology |
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131 / 322 page  © 2009 Microchip Technology Inc. DS70286C-page 129 dsPIC33FJXXXGPX06/X08/X10 REGISTER 8-1: DMAxCON: DMA CHANNEL x CONTROL REGISTER R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 U-0 U-0 U-0 CHEN SIZE DIR HALF NULLW — — — bit 15 bit 8 U-0 U-0 R/W-0 R/W-0 U-0 U-0 R/W-0 R/W-0 — —AMODE<1:0> — — MODE<1:0> bit 7 bit 0 Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown bit 15 CHEN: Channel Enable bit 1 = Channel enabled 0 = Channel disabled bit 14 SIZE: Data Transfer Size bit 1 = Byte 0 = Word bit 13 DIR: Transfer Direction bit (source/destination bus select) 1 = Read from DMA RAM address, write to peripheral address 0 = Read from peripheral address, write to DMA RAM address bit 12 HALF: Early Block Transfer Complete Interrupt Select bit 1 = Initiate block transfer complete interrupt when half of the data has been moved 0 = Initiate block transfer complete interrupt when all of the data has been moved bit 11 NULLW: Null Data Peripheral Write Mode Select bit 1 = Null data write to peripheral in addition to DMA RAM write (DIR bit must also be clear) 0 = Normal operation bit 10-6 Unimplemented: Read as ‘0’ bit 5-4 AMODE<1:0>: DMA Channel Operating Mode Select bits 11 = Reserved 10 = Peripheral Indirect Addressing mode 01 = Register Indirect without Post-Increment mode 00 = Register Indirect with Post-Increment mode bit 3-2 Unimplemented: Read as ‘0’ bit 1-0 MODE<1:0>: DMA Channel Operating Mode Select bits 11 = One-Shot, Ping-Pong modes enabled (one block transfer from/to each DMA RAM buffer) 10 = Continuous, Ping-Pong modes enabled 01 = One-Shot, Ping-Pong modes disabled 00 = Continuous, Ping-Pong modes disabled |
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