EZ80L92MCU Datasheet, PDF (151/241 Pages) Zilog, Inc. – eZ80Acclaim Flash Microcontrollers

eZ80L92 MCU
Product Specification
136
SPI Transmit Shift Register
The SPI Transmit Shift register (SPI_TSR) is used by the SPI master to transmit data onto
the SPI serial bus to the slave device. A Write to the SPI_TSR register places data directly
into the shift register for transmission. A Write to this register within an SPI device config-
ured as a master initiates transmission of the byte of the data loaded into the register. At
the completion of transmitting a byte of data, the SPIF status bit (SPI_SR[7]) is set to 1 in
both the master and slave devices.
The SPI Transmit Shift Write-Only register shares the same address space as the SPI
Receive Buffer Read-Only register. See Table 73.
Table 73. SPI Transmit Shift Register (SPI_TSR = 00BCh)
Bit
Reset
CPU Access
Note: W = Write only.
7
6
5
4
3
2
1
0
X
X
X
X
X
X
X
X
W
W
W
W
W
W
W
W
Bit
Position
[7:0]
TX_DATA
Value Description
00h– SPI transmit data.
FFh
PS013012-1004
PRELIMINARY
Serial Peripheral Interface