R5S77631Y266BGV Renesas Electronics America, R5S77631Y266BGV Datasheet - Page 496
![IC SUPERH MPU ROMLESS 499BGA](/photos/12/43/124352/r5s77631y266bgv_sml.jpg)
R5S77631Y266BGV
Manufacturer Part Number
R5S77631Y266BGV
Description
IC SUPERH MPU ROMLESS 499BGA
Manufacturer
Renesas Electronics America
Series
SuperH® SH7780r
Datasheet
1.R5S77631Y266BGV.pdf
(2056 pages)
Specifications of R5S77631Y266BGV
Core Processor
SH-4A
Core Size
32-Bit
Speed
266MHz
Connectivity
Audio Codec, I²C, MMC, SCI, SIM, SIO, SSI, USB
Peripherals
DMA, LCD, POR, WDT
Number Of I /o
107
Program Memory Type
ROMless
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
1.15 V ~ 1.35 V
Data Converters
A/D 4x10b; D/A 2x8b
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
499-BGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Program Memory Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
R5S77631Y266BGV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
- Current page: 496 of 2056
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Section 12 DDR-SDRAM Interface (DDRIF)
Rev. 2.00 May 22, 2009 Page 426 of 1982
REJ09B0256-0200
Bit
17, 16
15 to 13 SRFC
12
11
Bit Name
RW
SWR
SRRD
Initial
Value
00
000
0
0
R/W
R/W
R/W
R/W
R/W
Description
Minimum Number of Cycles from Read command to
Write Commands
These bits specify the minimum number of cycles for
the WRITE command issuance after the READ
command is issued for the DDR-SDRAM.
00: 3 cycles
01: 4 cycles
10: 5 cycles
11: 6 cycles
Number of Cycles in Same Bank
These bits specify the number of cycles in the same
bank for the following access times (Trfc).
(1) From auto refresh to ACT command issuance
(2) From auto refresh to auto refresh
000: 11 cycles
001: 12 cycles
010: 13 cycles
011: 14 cycles
100: 15 cycles
Other than above: Setting prohibited
PRE/PREALL Command Issuance Cycle
Specifies the number of cycles from the last postamble
to PRE/PREALL command issuance in a write cycle
(Twr).
0: 2 cycles
1: 3 cycles
ACT Command Issuance Cycle between Banks
Specifies the minimum number of cycles from ACT
command issuance to ACT command issuance
between different banks (Trrd).
0: 2 cycles
1: 3 cycles
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