R8A77800ANBGAV Renesas Electronics America, R8A77800ANBGAV Datasheet - Page 846
![IC SUPERH MPU ROMLESS 449-BGA](/photos/12/46/124616/r8a77800anbgav_sml.jpg)
R8A77800ANBGAV
Manufacturer Part Number
R8A77800ANBGAV
Description
IC SUPERH MPU ROMLESS 449-BGA
Manufacturer
Renesas Electronics America
Series
SuperH® SH7780r
Datasheet
1.R8A77800ANBGV.pdf
(1342 pages)
Specifications of R8A77800ANBGAV
Core Processor
SH-4A
Core Size
32-Bit
Speed
400MHz
Connectivity
Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
Peripherals
DMA, POR, WDT
Number Of I /o
75
Program Memory Type
ROMless
Ram Size
16K x 8
Voltage - Supply (vcc/vdd)
1.15 V ~ 1.35 V
Oscillator Type
External
Operating Temperature
-20°C ~ 75°C
Package / Case
449-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:
R8A77800ANBGAV
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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Section 21 Serial Communication Interface with FIFO (SCIF)
21.6
Note the following when using the SCIF.
(1)
The TDFE flag in SCFSR is set when the number of transmit data bytes written in SCFTDR has
fallen to or below the transmit trigger number set by bits TTRG1 and TTRG0 in SCFCR. After
TDFE is set, transmit data up to the number of empty bytes in SCFTDR can be written, allowing
efficient continuous transmission.
However, if the number of data bytes written in SCFTDR is equal to or less than the transmit
trigger number, the TDFE flag will be set to 1 again, even after being read as 1 and cleared to 0.
TDFE clearing should therefore be carried out when SCFTDR contains more than the transmit
trigger number of transmit data bytes.
The number of transmit data bytes in SCFTDR can be found from SCTFDR.
(2)
The RDF flag in SCFSR is set when the number of receive data bytes in SCFRDR has become
equal to or greater than the receive trigger number set by bits RTRG1 and RTRG0 in SCFCR.
After RDF is set, receive data equivalent to the trigger number can be read from SCFRDR,
allowing efficient continuous reception.
However, if the number of data bytes read in SCFRDR is equal to or greater than the trigger
number, the RDF flag will be set to 1 again even if it is cleared to 0. After the receive data is
read, clear the RDF flag readout to 0 in order to reduce the number of data bytes in SCFRDR to
less than the trigger number.
The number of receive data bytes in SCFRDR can be found from SCRFDR.
(3)
If a framing error (FER) is detected, break signals can also be detected by reading the SCIF_RXD
pin value directly. In the break state the input from the SCIF_RXD pin consists of all 0s, so the
FER flag is set and the parity error flag (PER) may also be set.
Although the SCIF stops transferring receive data to SCFRDR after receiving a break, the receive
operation continues.
Rev.1.00 Dec. 13, 2005 Page 794 of 1286
REJ09B0158-0100
SCFTDR Writing and the TDFE Flag
SCFRDR Reading and the RDF Flag
Break Detection and Processing
Usage Notes
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