R5S77631Y266BGV Renesas Electronics America, R5S77631Y266BGV Datasheet - Page 667

• Manufacturer Part Number: R5S77631Y266BGV
• Description: IC SUPERH MPU ROMLESS 499BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R5S77631Y266BGV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 266MHz
• Connectivity: Audio Codec, I²C, MMC, SCI, SIM, SIO, SSI, USB
• Peripherals: DMA, LCD, POR, WDT
• Number Of I /o: 107
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.15 V ~ 1.35 V
• Data Converters: A/D 4x10b; D/A 2x8b
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 499-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -

14.4.2
When the DMAC receives simultaneous transfer requests on two or more channels, it transfers
data according to a predetermined priority. Two modes (fixed mode and round-robin mode) are
selected by the bits PR[1:0] in DMAOR.
(1)
In this mode, the priority levels among the channels remain fixed. There are two kinds of fixed
modes as follows:
• CH0 > CH1 > CH2 > CH3 > CH4 > CH5
• CH0 > CH2 > CH3 > CH1 > CH4 > CH5
These are selected by the bits PR[1:0] in DMAOR
(2)
In round-robin mode each time data of one transfer unit (word, byte, longword, 16-byte, or 32-
byte unit) is transferred on one channel, the priority is rotated. The channel on which the transfer
was just finished rotates to the bottom of the priority. The round-robin mode operation is shown in
figure 14.2. The priority of round-robin mode is CH0 > CH1 > CH2 > CH3 > CH4 > CH5
immediately after reset.
When round-robin mode is specified, do not mix the cycle steal mode and the burst mode in
multiple channels' bus modes.
Fixed Mode
Round-Robin Mode
Channel Priority
Section 14 Direct Memory Access Controller (DMAC)
Rev. 2.00 May 22, 2009 Page 597 of 1982
REJ09B0256-0200