R8A77850AADBGV Renesas Electronics America, R8A77850AADBGV Datasheet - Page 553
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
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(Average refresh interval
12.5.6
Memory of various sizes can be connected through the settings of the SDRAM configuration
register (DBCONF). The BWIDTH bits are used to set the external data bus width, and the SPLIT
bit is used to set the size of the memory connected. The BASFT bit setting is used to move the
position of the bank address toward the lower bits; depending on the application the possibility of
page hits may be increased.
+ LV1TH)
Figure 12.7 Relation between Auto-Refresh Operation and Threshold Values
Max. value
Regarding Address Multiplexing
LV1TH
LV0TH
Refresh counter
value
0
Level 2
(Refreshing not done)
Level 1
(Refreshing during
Level 0
(Refreshing in vacant
SHwy commands)
request empty cycles)
periods between
Refreshing is done immediately
after auto-refresh is enabled
Time
Refreshing is done
during request
empty cycles
Rev.1.00 Jan. 10, 2008 Page 521 of 1658
The counter value increments
12. DDR2-SDRAM Interface (DBSC2)
the average refresh interval
by the amount of
vacant periods between
Refreshing is done in
SHwy commands
REJ09B0261-0100
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