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TMPR3911 Datasheet(PDF) 186 Page - Toshiba Semiconductor

Part # TMPR3911
Description  32-Bit TX System RISC TX39 Family
PDF  462 Pages
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Manufacturer  TOSHIBA [Toshiba Semiconductor]
Direct Link  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TMPR3911 Datasheet(HTML) 186 Page - Toshiba Semiconductor

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Chapter 7 CHI Module
7-12
7.3.5
DMA Address Generation
The CHI Module provides support for 2 full-duplex DMA channels: receive and transmit. The circuit
used to generate the DMA address, as well as half-buffer and end-of-buffer interrupts is shown in
Figure 7.3.4.
12
30
12
12
HALF-BUFFER
INTERRUPT
ONE-TIME VS.
CIRCULAR
MODE
END-OF-BUFFER
INTERRUPT
DMA
CONTROL FROM CPU
DMA ADDR
RX
START
ADDR
DMA RD/WR mode
CLK
30
TX
START
ADDR
2:1
DMA
CNTL
REG
CNT
LOAD
LOGIC
BUFFER
SIZE
CMP
CMP
ADDR CNT
÷ 2
Figure 7.3.4 CHI DMA Address Generation



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