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EM357-RTR Datasheet(PDF) 85 Page - Silicon Laboratories

Part # EM357-RTR
Description  High-Performance, Integrated ZigBee/802.15.4 System-on-Chip
PDF  241 Pages
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Manufacturer  SILABS [Silicon Laboratories]
Direct Link  http://www.silabs.com
Logo SILABS - Silicon Laboratories

EM357-RTR Datasheet(HTML) 85 Page - Silicon Laboratories

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85
Rev 1.3
8.4.2. Set Up and Configuration
Both serial controllers, SC1 and SC2, support SPI slave mode. SPI slave mode is enabled by the following register
settings:

The serial controller mode register, SCx_MODE, is 2

The SC_SPIMST bit in the SPI configuration register, SCx_SPICFG, is 0
The SPI slave controller receives its clock from an external SPI master device and supports rates up to 5 Mbps.
The SPI slave controller supports various frame formats depending upon the clock polarity (SC_SPIPOL), clock
phase (SC_SPIPHA), and direction of data (SC_SPIORD) (see Table 8.6). The SC_SPIPOL, SC_SPIPHA, and
SC_SPIORD bits are defined within the SCx_SPICFG registers.
Table 8.6. SPI Slave Formats
SCx_SPICFG
Frame Format
SC_SPIxxx*
MST
ORD
PHA
POL
0
0
0
0
0
0
0
1
0
0
1
0
0
0
1
1
0
1
—
—
Same as above except LSB first instead of MSB first
*Note:
The notation “xxx” means that the corresponding column header below is inserted to form the field name.
TX[7]
RX[7]
TX[6]
RX[6]
TX[5]
RX[5]
TX[4]
RX[4]
TX[3]
RX[3]
TX[2]
RX[2]
TX[1]
RX[1]
TX[0]
RX[0]
nSSEL
SCLKin
MOSIin
MISOout
TX[7]
RX[7]
TX[6]
RX[6]
TX[5]
RX[5]
TX[4]
RX[4]
TX[3]
RX[3]
TX[2]
RX[2]
TX[1]
RX[1]
TX[0]
RX[0]
SCLKin
MOSIin
MISOout
TX[7]
RX[7]
TX[6]
RX[6]
TX[5]
RX[5]
TX[4]
RX[4]
TX[3]
RX[3]
TX[2]
RX[2]
TX[1]
RX[1]
TX[0]
RX[0]
nSSEL
SCLKin
MOSIin
MISOout
TX[7]
RX[7]
TX[6]
RX[6]
TX[5]
RX[5]
TX[4]
RX[4]
TX[3]
RX[3]
TX[2]
RX[2]
TX[1]
RX[1]
TX[0]
RX[0]
nSSEL
MOSIin
MISOout
SCLKin



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