LM3S2110-IQN20-A0 Luminary Micro, Inc., LM3S2110-IQN20-A0 Datasheet - Page 292

• Manufacturer Part Number: LM3S2110-IQN20-A0
• Description: Microcontroller
• Manufacturer: Luminary Micro, Inc.

Synchronous Serial Interface (SSI)
SSI Status (SSISR)
SSI0 base: 0x4000.8000
Offset 0x00C
Type RO, reset 0x0000.0003
292
Reset
Reset
Type
Type
Bit/Field
31:5
4
3
2
1
RO
RO
31
15
0
0
Register 4: SSI Status (SSISR), offset 0x00C
SSISR is a status register that contains bits that indicate the FIFO fill status and the SSI busy status.
RO
RO
30
14
0
0
reserved
Name
RNE
BSY
RFF
TNF
RO
RO
29
13
0
0
RO
RO
28
12
0
0
RO
RO
Type
27
11
0
0
RO
RO
RO
RO
RO
reserved
RO
RO
26
10
0
0
Reset
0x00
0
0
0
1
RO
RO
25
0
9
0
Preliminary
Description
Software should not rely on the value of a reserved bit. To provide
compatibility with future products, the value of a reserved bit should be
preserved across a read-modify-write operation.
SSI Busy Bit
The BSY values are defined as follows:
SSI Receive FIFO Full
The RFF values are defined as follows:
SSI Receive FIFO Not Empty
The RNE values are defined as follows:
SSI Transmit FIFO Not Full
The TNF values are defined as follows:
RO
RO
Value
Value
Value
Value
24
0
8
0
reserved
0
1
0
1
0
1
0
1
Description
SSI is idle.
SSI is currently transmitting and/or receiving a frame, or the
transmit FIFO is not empty.
Description
Receive FIFO is not full.
Receive FIFO is full.
Description
Receive FIFO is empty.
Receive FIFO is not empty.
Description
Transmit FIFO is full.
Transmit FIFO is not full.
RO
RO
23
0
7
0
RO
RO
22
0
6
0
RO
RO
21
0
5
0
BSY
RO
RO
20
0
4
0
RFF
RO
RO
19
0
3
0
November 29, 2007
RNE
RO
RO
18
0
2
0
TNF
RO
RO
17
0
1
1
TFE
RO
R0
16
0
0
1