R8A77850AADBGV Renesas Electronics America, R8A77850AADBGV Datasheet - Page 580
R8A77850AADBGV
Manufacturer Part Number
R8A77850AADBGV
Description
IC SUPERH MCU 436-BGA
Manufacturer
Renesas Electronics America
Series
SuperH® SH7780r
Datasheet
1.R8A77850AADBGV.pdf
(1694 pages)
Specifications of R8A77850AADBGV
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
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
R8A77850AADBGV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 580 of 1694
- Download datasheet (9Mb)
12. DDR2-SDRAM Interface (DBSC2)
MCKE to high level, upon power-on reset the data within the SDRAM is destroyed. Hence if the
state signal is not set in advance to a state other than power supply backup state, there is the
danger that the destroyed data may be treated as the correct data.)
In this way, procedures are used to make a transition to and cancel SDRAM power supply backup
mode; if these procedures are not followed, the data in the SDRAM may be destroyed.
These procedures are explained below.
(1)
The following method is used.
1. Confirm that the controller is not being accessed. The time required for transition must not
2. Set the ACEN bit in the SDRAM operation enable register (DBEN) to 0 (access disabled).
3. Set the ARFEN bit in the SDRAM refresh control register 0 (DBRFCNT0) to 0 (automatic
4. Use the CMD bits in the SDRAM command control register (DBCMDCNT) to issue a PALL
5. Use the CMD bits in DBCMDCNT to issue a REF (auto-refresh) command.
6. Set the SRFEN bit in DBRFCNT0 to 1, to make a transition to self-refresh.
7. Check that the SRFEN bit is 1 by reading the SDRAM refresh control register (DBRFCNT0).
8. Use a general-purpose port or other means to convey to the external device that the SDRAM
9. Turn off the unnecessary power, other than the DBSC2 1.8 V I/O.
(2)
The following method is used.
1. Turn on the power supply to the LSI.
2. Input a power-on reset to the LSI.
3. After release of power-on reset, an external device should change the MBKPRST signal from
4. An external control circuit decides, using a general-use port or the like, whether to perform a
Rev.1.00 Jan. 10, 2008 Page 548 of 1658
REJ09B0261-0100
exceed the auto-refresh interval requested by the SDRAM by interrupts or some other causes.
issue of auto-refresh disabled).
(precharge all banks) command.
has entered the self-refresh state. Upon receiving this notification, the external device should
change the MBKPRST signal from high level to low level.
low to high level.
normal initialization sequence of the SDRAM, or to recover from power supply backup mode.
For normal initialization sequence of the SDRAM, refer to section 12.5.3, Initialization
Sequence.
Transition to SDRAM Power Supply Backup Mode
Recovery from SDRAM Power Supply Backup Mode
Related parts for R8A77850AADBGV
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
KIT STARTER FOR M16C/29
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C/2D
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
R0K33062P STARTER KIT
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C/23 E8A
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C/25
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER H8S2456 SHARPE DSPLY
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C38C
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8C35C
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R8CL3AC+LCD APPS
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR RX610
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR R32C/118
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT DEV RSK-R8C/26-29
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR SH7124
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT STARTER FOR H8SX/1622
Manufacturer:
Renesas Electronics America
Datasheet:
Part Number:
Description:
KIT DEV FOR SH7203
Manufacturer:
Renesas Electronics America
Datasheet: