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NuMicro® NUC029LEE/NUC029SEE
32-bit Arm
®
Cortex
®
-M0 Microcontroller
Aug, 2018
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[10]
SSTA_INTEN
Slave 3-Wire Mode Start Interrupt EnableBit
Used to enable interrupt when the transfer has started in Slave 3-wire mode. If
there is no transfer done interrupt over the time period which is defined by user
after the transfer start, the user can set the SLV_ABORT bit to force the transfer
done.
0 = Transaction start interrupt Disabled.
1 = Transaction start interrupt Enabled. It will be cleared to 0 as the current
transfer is done or the SLV_START_INTSTS bit is cleared.
[9]
SLV_ABORT
Slave 3-Wire Mode Abort Control
In normal operation, there is an interrupt event when the received data meet the
required bits which defined in TX_BIT_LEN.
If the received bits are less than the requirement and there is no more SPI clock
input over the one transfer time in Slave 3-wire mode, the user can set this bit to
force the current transfer done and then the user can get a transfer done interrupt
event.
Note:
This bit will be cleared to 0 automatically by hardware after it is set to 1 by
software.
[8]
NOSLVSEL
Slave 3-Wire Mode Enable Bit
This is used to ignore the slave select signal in Slave mode. The SPI controller
can work with 3-wire interface including SPIn_CLK, SPIn_MISO, and SPIn_MOSI.
0 = 4-wire bi-direction interface.
1 = 3-wire bi-direction interface.
Note:
In Slave 3-wire mode, the SS_LTRIG, SPI_SSR[4] will be set as 1
automatically.
[7:0]
Reserved
Reserved.