R5S77631Y266BGV Renesas Electronics America, R5S77631Y266BGV Datasheet - Page 635

• 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: -

To prevent a device that does not execute REQ negation and FRAME assertion simultaneously
(figure 13.27) from being a bus master, preventive measure 1 or 2 below should be taken.
1. Use pseudo-round-robin mode.
2. Assign the lowest priority level to the relevant device.
However, if none of the external devices connected to the PCI has such negation/assertion timing
or if none of the external devices with such negation/assertion timing can be a bus master, the
above preventive measures are not required.
Pseudo-round-robin mode should be set (BMAM bit in PCICR = 1) as the PCI bus arbitration
scheme.
When there is only one device that does not execute REQ negation and FRAME assertion
simultaneously, the device should be connected to the REQn and GNTn with the lowest
priority.
Rev. 2.00 May 22, 2009 Page 565 of 1982
Section 13 PCI Controller (PCIC)
REJ09B0256-0200