Texas Instruments SimpleLink CC2620 Technical Reference Manual page 1385

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20.7.1.2 CR1 Register (Offset = 4h) [reset = 0h]
CR1 is shown in Figure 20-14
Control 1
31 30 29 28
15 14 13 12
Bit Field
31-4 RESERVED
3 SOD
2 MS
1 SSE
0 LBM
SWCU117C – February 2015 – Revised September 2015
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and described in Table
Figure 20-14. CR1 Register
27 26 25 24
RESERVED
R-0h
11 10 9 8
RESERVED
R-0h
Table 20-4. CR1 Register Field Descriptions
Type Reset
R 0h
R/W 0h
R/W 0h
R/W 0h
R/W 0h
Copyright © 2015, Texas Instruments Incorporated
20-4.
23 22 21 20
7 6 5 4
Description
Software must not rely on the value of a reserved. Writing any other
value than the reset value may result in undefined behavior.
Slave-mode output disabled
This bit is relevant only in the slave mode, MS=1. In multiple-slave
systems, it is possible for an SSI master to broadcast a message to
all slaves in the system while ensuring that only one slave drives
data onto its serial output line. In such systems the RXD lines from
multiple slaves could be tied together. To operate in such systems,
this bit field can be set if the SSI slave is not supposed to drive the
TXD line:
0: SSI can drive the TXD output in slave mode.
1: SSI cannot drive the TXD output in slave mode.
Master or slave mode select. This bit can be modified only when SSI
is disabled, SSE=0.
0h = Device configured as master
1h = Device configured as slave
Synchronous serial interface enable.
0h = SSI_DISABLED : Operation disabled
1h = SSI_ENABLED : Operation enabled
Loop back mode:
0: Normal serial port operation enabled.
1: Output of transmit serial shifter is connected to input of receive
serial shifter internally.
Synchronous Serial Interface (SSI)
SSI Registers
19 18 17 16
3 2 1 0
SOD MS SSE LBM
R/W- R/W- R/W- R/W-
0h 0h 0h 0h
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