R5S77631Y266BGV Renesas Electronics America, R5S77631Y266BGV Datasheet - Page 1189
![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
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Thus, the reception margin in asynchronous mode is given by formula (1).
M: Receive margin (%)
N: Ratio of bit rate to clock (N = 16)
D: Clock duty (D = 0 to 1.0)
L:
F:
From equation (1), if F = 0 and D = 0.5, the reception margin is 46.875%, as given by formula (2).
When D = 0.5 and F = 0:
However, this is a theoretical value. A reasonable margin to allow in system designs is 20% to
30%.
(6)
When using an external clock as the synchronization clock, after SCFTDR is updated by the
DMAC, an external clock should be input after at least five peripheral clock (Pck) cycles. A
malfunction may occur when the transfer clock is input within four cycles after updating SCFTDR
(see figure 27.23).
Frame length (L = 9 to 12)
Absolute value of clock rate deviation
When Using the DMAC
M = (0.5 – 1 / (2 × 16) ) × 100% = 46.875% ............................................... (2)
M= (0.5 -
Figure 27.23 Example of Synchronization Clock Transfer by DMAC
SCIF_CLK
TDRE
SCIF_TXD
Note: When the SCIF is operated on an external clock, set t > 4.
2N
1
) - (L - 0.5) F -
t
D0
D1
| D - 0.5 |
Section 27 Serial Communication Interface with FIFO (SCIF)
N
D2
(1 + F) × 100 % .................. (1)
D3
Rev. 2.00 May 22, 2009 Page 1119 of 1982
D4
D5
D6
D7
REJ09B0256-0200
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