R8A77850ANBGV Renesas Electronics America, R8A77850ANBGV Datasheet - Page 538

• Manufacturer Part Number: R8A77850ANBGV
• Description: IC SUPERH MPU ROMLESS 436-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R8A77850ANBGV

• 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: -20°C ~ 75°C
• Package / Case: 436-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

12. DDR2-SDRAM Interface (DBSC2)
Note: This register is used for initialization, when canceling self-refresh, and when canceling
Rev.1.00 Jan. 10, 2008 Page 506 of 1658
REJ09B0261-0100
Bit
2 to 0
power supply backup.
For details, refer to section 12.5.3, Initialization Sequence, section 12.5.4, Self-Refresh
Operation, and (2) Recovery from SDRAM Power Supply Backup Mode in section 12.5.10,
DDR2-SDRAM Power Supply Backup Function.
Bit Name
FREQ0
FREQ2 to
Initial
Value
000
R/W
R/W
Description
Frequency Setting Bits
These bits set the operating frequency of the data bus
in the DDR2-SDRAM.
000: up to 300 MHz (DDR2-600)
001: Reserved
010: 200 MHz (DDR2-400)
100 to 111: Setting prohibited. (If specified, correct
operation cannot be guaranteed.)