R5S77631Y266BGV Renesas Electronics America, R5S77631Y266BGV Datasheet - Page 1504
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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Section 34 Serial Sound Interface (SSI)
Rev. 2.00 May 22, 2009 Page 1434 of 1982
REJ09B0256-0200
Bit
27
Bit Name
UIRQ
Initial
Value
0
R/W
R/W
*
1
Description
Underflow Error Interrupt Status Flag
This status flag indicates that the data has been
supplied at a lower rate than the required rate.
This bit is set to 1 regardless of the setting of UIEN bit.
In order to clear it to 0, write 0 in it.
If UIRQ = 1 and UIEN = 1, then an interrupt will be
generated.
When TRMD = 0 (Receive Mode):
If UIRQ = 1, it indicates that SSIRDR was read out
before DMRQ and DIRQ bits would indicate the
existence of new unread data. In this instance, the
same received data may be stored twice by the host,
which can lead to destruction of multi-channel data.
When TRMD = 1 (Transmit Mode):
If UIRQ = 1, it indicates that the transmitted data was
not written in SSITDR. By this, the same data may be
transmitted one time too often, which can lead to
destruction of multi-channel data. Consequently,
erroneous SSI data will be output, which makes this
error more serious than underflow in the receive mode.
Note: When underflow error occurs, the data in the data
buffer will be transmitted until the next data is
written in.
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