R8A77850ANBGV Renesas Electronics America, R8A77850ANBGV Datasheet - Page 571

• 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: -

Figure 12.16 shows a case in which, after a write request, access occurs requiring that bank B be
closed. After the issue of a WRITE command, it is necessary to wait for time tWR or longer after
output of the write data before issuing a PRE command.
Example of CL = 3
MCK0,
MCK1
MCKE
MCS
MRAS
MCAS
MWE
MA[14:11]
MA[9:0]
MA[10]
MBA[2:0]
MDQS[3:0]
MDM[3:0]
MDQ[31:0]
SDRAM
command
WRITE
bank A
Valid
Valid
Valid
Invalid
Invalid
Write data
High level
Invalid
Invalid
Figure 12.16 tWR
Invalid
tWR
= 3 cycles
bank A
PRE
Valid
Rev.1.00 Jan. 10, 2008 Page 539 of 1658
Invalid
Invalid
12. DDR2-SDRAM Interface (DBSC2)
Invalid
Invalid
bank A
ACT
Valid
Valid
Valid
Invalid
Invalid
Invalid
REJ09B0261-0100
WRITE
bank A
Valid
Valid
Valid