0X4324: Spi Receive Data Register (Spi_Rxd) - Epson S1C17704 Technical Manual

0x4324: SPI Receive Data Register (SPI_RXD)

Register name Address Bit
SPI Receive 0x4324 D15–8 –
Data Register (16 bits)
D7–0 SPRDB[7:0] SPI receive data buffer
(SPI_RXD)
D[15:8] Reserved
D[7:0] SPRDB[7:0]: SPI Receive Data Buffer Bits
Stores received data. (Default: 0x0)
When a receive operation is completed and the data received in the shift register is loaded to the receive
data buffer, SPRBF (D1/SPI_ST register) is set to 1 (buffer full). At the same time, a cause of receive
data buffer full interrupt occurs. Thereafter, the data can be read out at any time before a receive
operation for the next data is completed.
If the next data receive operation is completed before this register is read out, the data in it is
overwritten with the newly received data.
The serial data input from the SDI pin is converted into parallel data beginning with the MSB, with the
high-level signals changed to 1s and the low-level signals changed to 0s. The resulting data is stored in
this register.
SPI_RXD is a read-only register, so no data can be written to it.
S1C17704 TECHNICAL MANUAL
Name Function
reserved
SPRDB7 = MSB
SPRDB0 = LSB
EPSON
Setting Init. R/W
– – –
0x0 to 0xff 0x0 R
19 SPI
Remarks
0 when being read.
19-13