ISD94100 Series Technical Reference Manual
Sep 9, 2019
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SPI Slave Select Control Register (SPIn_SSCTL)
Register
Offset
R/W Description
Reset Value
SPI1_SSCTL
0x08
R/W SPI1 Slave Select Control Register
0x0000_0000
SPI2_SSCTL
0x08
R/W SPI2 Slave Select Control Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
SSINAIEN
SSACTIEN
Reserved
SLVURIEN
SLVBEIEN
7
6
5
4
3
2
1
0
Reserved
AUTOSS
SSACTPOL
Reserved
SS
Bits
Description
[31:14]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[13]
SSINAIEN
Slave Select Inactive Interrupt Enable Bit
0 = Slave select inactive interrupt Disabled.
1 = Slave select inactive interrupt Enabled.
[12]
SSACTIEN
Slave Select Active Interrupt Enable Bit
0 = Slave select active interrupt Disabled.
1 = Slave select active interrupt Enabled.
[11:10]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write with
reset value.
[9]
SLVURIEN
Slave Mode TX Under Run Interrupt Enable Bit
0 = Slave mode TX under run interrupt Disabled.
1 = Slave mode TX under run interrupt Enabled.
[8]
SLVBEIEN
Slave Mode Bit Count Error Interrupt Enable Bit
0 = Slave mode bit count error interrupt Disabled.
1 = Slave mode bit count error interrupt Enabled.
[7:4]
Reserved
Reserved.
[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 (SPIn_SSCTL[0]).
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.
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