DS72030W200FPV Renesas Electronics America, DS72030W200FPV Datasheet - Page 453

• Manufacturer Part Number: DS72030W200FPV
• Description: MPU, 32BIT, SH7203, ROMLESS, 240QFP
• Manufacturer: Renesas Electronics America
• Series: SH7200r

Specifications of DS72030W200FPV

• Core Size: 32bit
• Program Memory Size: 32KB
• Cpu Speed: 200MHz
• Digital Ic Case Style: QFP
• No. Of Pins: 240
• Supply Voltage Range: 1.1V To 1.3V
• Operating Temperature Range: -20°C To +85°C
• Svhc: No SVHC
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

10.4
When there is a DMA transfer request, the DMAC starts the transfer according to the
predetermined channel priority order; when the transfer end conditions are satisfied, it ends the
transfer. Transfers can be requested in three modes: auto request, external request, and on-chip
peripheral module request. In bus mode, the burst mode or the cycle steal mode can be selected.
10.4.1
After the DMA source address registers (SAR), DMA destination address registers (DAR), DMA
transfer count registers (DMATCR), DMA channel control registers (CHCR), DMA operation
register (DMAOR), three reload registers (RSAR, RDAR, RDMATCR) and DMA extension
resource selector (DMARS) are set for the target transfer conditions, the DMAC transfers data
according to the following procedure:
1. Checks to see if transfer is enabled (DE = 1, DME = 1, TEMASK = 0 or 1 (TE = 0 when
2. When a transfer request comes and transfer is enabled, the DMAC transfers one transfer unit of
3. When half of the specified transfer count is exceeded (when DMATCR reaches half of the
4. When transfer has been completed for the specified count (when DMATCR reaches 0) while
5. When an address error in the DMAC or an NMI interrupt is generated, the transfer is
TEMASK = 0), AE = 0, NMIF = 0).
data (depending on the settings of the TS1 and TS0 bits). For an auto request, the transfer
begins automatically when the DE bit and DME bit are set to 1. The DMATCR value will be
decremented by 1 for each transfer. The actual transfer flows vary by address mode and bus
mode.
initial value), an HEI interrupt is sent to the CPU if the HIE bit in CHCR is set to 1.
the TEMASK bit is 0, the transfer ends normally. If the IE bit in CHCR is set to 1 at this time,
a DEI interrupt is sent to the CPU. When DMATCR reaches 0 while the TEMASK bit is 1, the
TE bit is set to 1 and then the values set in RSAR, RDAR and RDMATCR are reloaded in
SAR, DAR and DMATCR, respectively to continue transfer operation until the DMA transfer
request is cancelled.
terminated. Transfers are also terminated when the DE bit in CHCR or the DME bit in
DMAOR is cleared to 0.
Operation
Transfer Flow
Section 10 Direct Memory Access Controller (DMAC)
Rev. 3.00 Sep. 28, 2009 Page 421 of 1650
REJ09B0313-0300