ISD94100 Series Technical Reference Manual
Sep 9, 2019
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[5]
SLVTOIEN
Slave Mode Time-out Interrupt Enable Bit (Only Supported in SPI0)
0 = Slave mode time-out interrupt Disabled.
1 = Slave mode time-out interrupt Enabled.
[4]
SLV3WIRE
Slave 3-wire Mode Enable Bit (Only Supported in SPI0)
Slave 3-wire mode is only available in SPI0. In Slave 3-wire mode, the SPI controller can
work with 3-wire interface including SPI0_CLK, SPI0_MISO and SPI0_MOSI pins.
0 = 4-wire bi-direction interface.
1 = 3-wire bi-direction interface.
[3]
AUTOSS
Automatic Slave Selection Function Enable Bit (Master Only)
0 = Automatic slave selection function Disabled. Slave selection signal will be asserted/de-
asserted according to SS (SPI0_SSCTL[0]) and SS1 (SPI0_SSCTL[1]).
1 = Automatic slave selection function Enabled.
[2]
SSACTPOL
Slave Selection Active Polarity
This bit defines the active polarity of slave selection signal.
0 = The slave selection signal is active low.
1 = The slave selection signal is active high.
[1]
SS1
Slave Selection Control 1 (Master Only)
If AUTOSS bit is cleared to 0,
0 = Set the SPI0_SS1 line to inactive state.
1 = Set the SPI0_SS1 line to active state.
If the AUTOSS bit is set to 1,
0 = Keep the SPI0_SS1 line at inactive state.
1 = SPI0_SS1 line will be automatically driven to active state for the duration of data transfer,
and will be driven to inactive state for the rest of the time. The active state of slave select line
is specified in SSACTPOL (SPI0_SSCTL[2]).
Note:
SPI0_SS0 pin is defined as the slave select input in Slave mode.
[0]
SS
Slave Selection Control (Master Only)
If AUTOSS bit is cleared to 0,
0 = Set the SPI0_SS0 line to inactive state.
1 = Set the SPI0_SS0 line to active state.
If the AUTOSS bit is set to 1,
0 = Keep the SPI0_SS0 line at inactive state.
1 = SPI0_SS0 line will be automatically driven to active state for the duration of data transfer,
and will be driven to inactive state for the rest of the time. The active state of slave select line
is specified in SSACTPOL (SPI0_SSCTL[2]).
Note:
SPI0_SS0 is defined as the slave select input in Slave mode.