R8A77850ANBGV Renesas Electronics America, R8A77850ANBGV Datasheet - Page 575

• 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 12.20 is an example of a case in which, after issuing a REF command, a READ request is
issued. In order to issue the ACT commend after issuing the REF command, the DBSC2 waits for
a time stipulated by tRFC.
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
REF
tRFC
= 6 cycles
Invalid
Invalid
Invalid
High level
Figure 12.20 tRFC
bank
ACT
Invalid
Invalid
any
Valid
Valid
Valid
Invalid
Invalid
Invalid
Rev.1.00 Jan. 10, 2008 Page 543 of 1658
12. DDR2-SDRAM Interface (DBSC2)
READ
bank
any
Valid
Valid
Valid
Invalid
Invalid
Invalid
REJ09B0261-0100