D6417729RHF200BV Renesas Electronics America, D6417729RHF200BV Datasheet - Page 452

• Manufacturer Part Number: D6417729RHF200BV
• Description: IC SUPER H MPU ROMLESS 208QFP
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7700r

Specifications of D6417729RHF200BV

• Core Processor: SH-3 DSP
• Core Size: 32-Bit
• Speed: 200MHz
• Connectivity: EBI/EMI, FIFO, IrDA, SCI, SmartCard
• Peripherals: DMA, POR, WDT
• Number Of I /o: 96
• Program Memory Type: ROMless
• Ram Size: 32K x 8
• Voltage - Supply (vcc/vdd): 1.85 V ~ 2.15 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 208-QFP Exposed Pad, 208-eQFP, 208-HQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

Burst Mode
Once the bus is obtained, the transfer is performed continuously until the transfer end
condition is satisfied. In external request mode with low level detection of the DREQ pin,
however, when the DREQ pin is driven high, the bus passes to the other bus master after the
DMAC transfer request that has already been accepted ends, even if the transfer end conditions
have not been satisfied.
Burst mode cannot be used when a SCIF (IrDA or SCIF) is the transfer request source. Figure
12.15 shows an example of burst mode timing.
DREQ
Bus cycle
CPU
CPU
CPU
DMAC DMAC DMAC
DMAC DMAC
DMAC
CPU
Read
Write
Read
Write
Read
Write
Figure 12.15 Example of Transfer in Burst Mode
Rev. 5.0, 09/03, page 404 of 806