R8A77850ANBGV Renesas Electronics America, R8A77850ANBGV Datasheet - Page 516

• 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)
12.4.3
The SDRAM command control register (DBCMDCNT) is a readable/writable register. It is
initialized only upon power-on reset. The CMD2 to CMD0 bits in DBCMDCNT are always read
as 000.
Initial value:
Initial value:
Rev.1.00 Jan. 10, 2008 Page 484 of 1658
REJ09B0261-0100
Bit
31 to 3
R/W:
R/W:
BIt:
BIt:
SDRAM Command Control Register (DBCMDCNT)
Bit Name
⎯
31
15
⎯
⎯
R
R
0
0
30
14
⎯
⎯
R
R
0
0
29
⎯
13
⎯
R
R
0
0
Initial
Value
All 0
28
12
⎯
⎯
R
R
0
0
27
11
⎯
⎯
R
R
0
0
R/W
R
26
10
⎯
⎯
R
R
0
0
Description
Reserved
These bits are always read as 0. The write value should
always be 0.
Operation when a value other than 0 is written is not
guaranteed.
25
⎯
⎯
R
R
0
9
0
24
⎯
⎯
R
R
0
8
0
23
⎯
⎯
R
R
0
7
0
22
⎯
⎯
R
R
0
6
0
21
⎯
⎯
R
R
0
5
0
20
⎯
⎯
R
R
0
4
0
19
⎯
⎯
R
R
0
3
0
CMD2
R/W
18
⎯
R
0
0
2
CMD1
R/W
17
⎯
R
0
1
0
CMD0
R/W
16
⎯
R
0
0
0