R8A77850ADBGV Renesas Electronics America, R8A77850ADBGV Datasheet - Page 258

• Manufacturer Part Number: R8A77850ADBGV
• Description: IC SUPERH MPU ROMLESS 436-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R8A77850ADBGV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 600MHz
• Connectivity: Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
• Peripherals: DMA, POR, WDT
• Number Of I /o: 108
• Program Memory Type: ROMless
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 1 V ~ 1.2 V
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 436-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

8. Caches
8.3.6
OC Two-Way Mode
When the OC2W bit in RAMCR is set to 1, OC two-way mode which only uses way 0 and way 1
in the OC is entered. Thus, power consumption can be reduced. In this mode, only way 0 and way
1 are used even if a memory-mapped OC access is made.
The OC2W bit should be modified by a program in the P2 area. At that time, if the valid line has
already been recorded in the OC, data should be written back by software, if necessary, 1 should
be written to the OCI bit in CCR, and all entries in the OC should be invalid before modifying the
OC2W bit.
Rev.1.00 Jan. 10, 2008 Page 226 of 1658
REJ09B0261-0100