R8A77800ANBGAV Renesas Electronics America, R8A77800ANBGAV Datasheet - Page 795

• Manufacturer Part Number: R8A77800ANBGAV
• Description: IC SUPERH MPU ROMLESS 449-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

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: -

21.3.3
SCTSR is the register used to transmit serial data.
To perform serial data transmission, the SCIF first transfers transmit data from SCFTDR to
SCTSR, then sends the data to the SCIF_TXD pin starting with the LSB (bit 0).
When transmission of one byte is completed, the next transmit data is transferred from SCFTDR
to SCTSR, and transmission started, automatically.
SCTSR cannot be directly read from and written to by the CPU.
21.3.4
SCFTDR is an 8-bit FIFO register of 64 stages that stores data for serial transmission.
If SCTSR is empty when transmit data has been written to SCFTDR, the SCIF transfers the
transmit data written in SCFTDR to SCTSR and starts serial transmission.
SCFTDR is a write-only register, and cannot be read by the CPU.
The next data cannot be written when SCFTDR is filled with 64 bytes of transmit data. Data
written in this case is ignored.
Transmit Shift Register (SCTSR)
Transmit FIFO Data Register (SCFTDR)
Initial value:
Initial value:
R/W:
R/W:
Bit:
Bit:


—
W
7
7


—
W
6
6
Section 21 Serial Communication Interface with FIFO (SCIF)


—
W
5
5


—
W
4
4


—
W
3
3
Rev.1.00 Dec. 13, 2005 Page 743 of 1286


—
W
2
2


—
W
1
1


—
W
0
0
REJ09B0158-0100