BMSKTOPASA900(DCE) Toshiba, BMSKTOPASA900(DCE) Datasheet - Page 783

• Manufacturer Part Number: BMSKTOPASA900(DCE)
• Description: KIT STARTER TMPA900 USB JTAG
• Manufacturer: Toshiba
• Series: TOPASr
• Type: MCUr

Specifications of BMSKTOPASA900(DCE)

• Contents: Evaluation Board, Cable(s), Software and Documentation
• For Use With/related Products: TMPA900CMXBG
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

(CMSCR<CSRST>=1)
（CMSCV<DMAEN>=0)
（DMACCｘConfiguration<E>=0)
(CMSCR<CSRST>=0)
（CMSCV<DMAEN>=1)
Figure 3.22.9 Example of Problem When the Watermark Level is 32 Bytes and the CMSI is Reset during a
Restart CMSI
Disable DMA channel
Reset CMSI
Read 24 bytes
Clear interrupt
Write 32 bytes
Empty
16 bytes
24 bytes are read.
*The read and write pointers are cleared.
DMA Burst Transfer (Transfer Width: 8 Bits, Burst Size: 32 Beats)
32 bytes are written.
16 bytes 16 bytes 16 bytes
TENTATIVE
TMPA900CM- 782
16 bytes
INTCMSF
Cleared
Request
The DMA request still remains
when the CMSI is restarted.
This causes an erroneous
transfer with no data written in
the FIFO.
DMA request
Request
*The DMA request is
not cleared because
32 bytes have not
been transferred.
*The DMA request
is not cleared.
*The DMA request
is not cleared.
TMPA900CM
2009-10-14