R8A77850BDBGV#RD0Z Renesas Electronics America, R8A77850BDBGV#RD0Z Datasheet - Page 577

• Manufacturer Part Number: R8A77850BDBGV#RD0Z
• Description: IC SUPERH MPU ROMLESS 436BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R8A77850BDBGV#RD0Z

• 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: -

MCK
MCKE
Command
Data
Terminating
resistor
in SDRAM
MODT
As shown in the above figure, when CL is 4, the effective ODT control signal
(MODT) to the SDRAM can be asserted at the same timing as the issue of the
WRITE command. If CL is 5 or greater, MODT is asserted after the issue of the
WRITE command. However, if CL is 3 or less, MODT needs to be asserted
before the issue of the WRITE command, which is not supported by this LSI.
Figure 12.21 ODT Control Signal when CL = 4
write
tAOND
= 2 cycles
High level
3 cycles
for product
with CL = 4
Resistor ON
tAOFD
= 2.5 cycles
Rev.1.00 Jan. 10, 2008 Page 545 of 1658
12. DDR2-SDRAM Interface (DBSC2)
REJ09B0261-0100