D6417729RHF200BV Renesas Electronics America, D6417729RHF200BV Datasheet - Page 456

• 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, Level Detection
In the case of burst mode with level detection, the DREQ sampling timing is the same as in
cycle-steal mode.
For example, in figure 12.22, DMAC transfer begins, at the earliest, three cycles after the first
sampling is performed. The second sampling is started two cycles after the first. Subsequent
sampling operations are performed in the idle cycle following the end of the DMA transfer
cycle.
In burst mode, also, the DACK output period is the same as in cycle-steal mode.
Burst Mode, Edge Detection
In the case of burst mode with edge detection, DREQ sampling is only performed once.
For example, in figure 12.23, DMAC transfer begins, at the earliest, three cycles after the first
sampling is performed. After this, DMAC transfer is executed continuously until the number
of data transfers set in the DMATCR register have been completed. DREQ is not sampled
during this time.
To restart DMA transfer after it has been suspended by an NMI, first clear NMIF, then input
an edge request again.
In burst mode, also, the DACK output period is the same as in cycle-steal mode.
Rev. 5.0, 09/03, page 408 of 806