Texas Instruments CC2650DK ユーザーズマニュアル
SSI Registers
20.7.1.4 SR Register (Offset = Ch) [reset = X]
SR is shown in
and described in
Status
Figure 20-16. SR Register
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
RESERVED
R-X
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
RESERVED
BSY
RFF
RNE
TNF
TFE
R-X
R-X
R-X
R-X
R-1h
R-1h
Table 20-6. SR Register Field Descriptions
Bit
Field
Type
Reset
Description
31-5
RESERVED
R
X
Software should not rely on the value of a reserved. Writing any
other value than the reset value may result in undefined behavior.
other value than the reset value may result in undefined behavior.
4
BSY
R
X
Serial interface busy: 0: SSI is idle 1: SSI is currently transmitting
and/or receiving a frame or the transmit FIFO is not empty.
and/or receiving a frame or the transmit FIFO is not empty.
3
RFF
R
X
Receive FIFO full: 0: Receive FIFO is not full. 1: Receive FIFO is full.
2
RNE
R
X
Receive FIFO not empty 0: Receive FIFO is empty. 1: Receive FIFO
is not empty.
is not empty.
1
TNF
R
1h
Transmit FIFO not full: 0: Transmit FIFO is full. 1: Transmit FIFO is
not full.
not full.
0
TFE
R
1h
Transmit FIFO empty: 0: Transmit FIFO is not empty. 1: Transmit
FIFO is empty.
FIFO is empty.
1371
SWCU117A – February 2015 – Revised March 2015
Synchronous Serial Interface (SSI)
Copyright © 2015, Texas Instruments Incorporated