TMPR4937XBG-300 Toshiba, TMPR4937XBG-300 Datasheet - Page 162

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TMPR4937XBG-300

Manufacturer Part Number
TMPR4937XBG-300
Description
Manufacturer
Toshiba
Datasheet

Specifications of TMPR4937XBG-300

Family Name
TX49
Device Core Size
64b
Frequency (max)
300MHz
Instruction Set Architecture
RISC
Supply Voltage 1 (typ)
1.5V
Operating Supply Voltage (max)
1.6V
Operating Supply Voltage (min)
1.4V
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
484
Package Type
BGA
Lead Free Status / Rohs Status
Compliant

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OE*/BUSSPRT*
ADDR [19:0]
DMADONE*
DMAREQ[n]
DMAACK[n]
DATA [31:0]
SYSCLK
SWE*
BWE*
ACE*
ACK*
CE*
Figure 8.3.1 External I/O DMA Transfer (Single Address, Level Request)
diagram, both the DMAREQ[n] signal and the DMAACK[n] signal are set to Low active
(DMCCRn.REQPL = 0, DMCCRn.ACKPOL = 0).
synchronized to SDCLK. When these signals are used by an external I/O device that is
synchronous to SYSCLK, it is necessary to take clock skew into account.
the CE*/CS* signal, or before that. In addition, it is deasserted after the last ACK*/READY signal
is deasserted.
least one SYSCLK cycle while the DMAACK[n] signal is asserted either during the same
SYSCLK cycle that the CE*/CS* signal is deasserted or during a subsequent SYSCLK cycle.
When the DMADONE* signal is used as an input signal, it must be asserted for one SYSCLK
cycle while the DMAACK[n] signal is being asserted.
Figure 8.3.1 is a timing diagram that shows the timing of external DMA access. In this timing
The DMAACK[n] and DMADONE[n] signals, which are DMA control signals, are
The DMAACK[n] signal is asserted either at the SYSCLK cycle, the same as with assertion of
When the DMADONE* signal (refer to 8.3.3.4) is used as an output signal, it is asserted for at
1 cycle
When edge detection is set (DMCCRn.EGREQ = 1)
after the DMAACK[n] signal corresponding to a previously asserted DMAREQ[n] signal is
deasserted. The DMAREQ[n] signal will not be detected even if it is asserted before
DMAACK[n] is deasserted.
Please set up assertion of the DMAREQ[n] signal so the DMAREQ[n] signal is asserted
1c040
8-6
f
00000100
00040
Chapter 8 DMA Controller

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