C8051F320DK Silicon Laboratories Inc, C8051F320DK Datasheet - Page 200
C8051F320DK
Manufacturer Part Number
C8051F320DK
Description
DEV KIT FOR C8051F320/F321
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051F320DK
Contents
Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
Processor To Be Evaluated
C8051F320/F321
Interface Type
USB
Silicon Manufacturer
Silicon Labs
Core Architecture
8051
Silicon Core Number
C8051F320
Silicon Family Name
C8051F32x
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
Silicon Laboratories C8051F320, C8051F321
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1260
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C8051F320/1
slower. When the SPI is configured as a slave, the maximum data transfer rate (bits/sec) for full-duplex
operation is 1/10 the system clock frequency, provided that the master issues SCK, NSS (in 4-wire slave
mode), and the serial input data synchronously with the slave’s system clock. If the master issues SCK,
NSS, and the serial input data asynchronously, the maximum data transfer rate (bits/sec) must be less
than 1/10 the system clock frequency. In the special case where the master only wants to transmit data to
the slave and does not need to receive data from the slave (i.e. half-duplex operation), the SPI slave can
receive data at a maximum data transfer rate (bits/sec) of 1/4 the system clock frequency. This is provided
that the master issues SCK, NSS, and the serial input data synchronously with the slave’s system clock.
200
NSS (Must Remain High
in Multi-Master Mode)
SCK
(CKPOL=0, CKPHA=0)
SCK
(CKPOL=1, CKPHA=0)
MOSI
MISO
NSS (4-Wire Mode)
SCK
(CKPOL=0, CKPHA=0)
SCK
(CKPOL=0, CKPHA=1)
SCK
(CKPOL=1, CKPHA=0)
SCK
(CKPOL=1, CKPHA=1)
MISO/MOSI
Figure 18.6. Slave Mode Data/Clock Timing (CKPHA = 0)
Figure 18.5. Master Mode Data/Clock Timing
MSB
MSB
MSB
Bit 6
Bit 6
Bit 6
Bit 5
Bit 5
Bit 5
Rev. 1.4
Bit 4
Bit 4
Bit 4
Bit 3
Bit 3
Bit 3
Bit 2
Bit 2
Bit 2
Bit 1
Bit 1
Bit 1
Bit 0
Bit 0
Bit 0
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