em78p613 ELAN Microelectronics Corp, em78p613 Datasheet - Page 33

• Manufacturer Part Number: em78p613
• Description: Universal Serial Bus Series Microcontroller
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.0) 01.09.2009
(This specification is subject to change without further notice)
SSE: Loads the data in SPIW register, and begin to shift
SPIS reg.: Shifting byte in and out. The MSB is shifted first. Both the SPI IN FIFO
SPIR reg : Read buffer. The buffer will be updated as the 8-byte data shifting is
SPIW reg : Write buffer. The buffer will ignore any attempt to write until the 8-byte
SBRS2~SBRS0: Programs the clock frequency/rates and sources.
Edge Select: Selects the appropriate clock edges by programming the CES bit.
data and the SPI OUT FIFO data are loaded at the same time. Once data are
written, the SPIS starts transmission/reception. The received data will be moved
to the SPI IN FIFO register as the shifting of the 8-byte data is completed. The
RBF (Read Buffer Full) flag and the RBFIF (Read Buffer Full Interrupt) flag are
then set.
completed. The data must be read before the next reception is completed. The
RBF flag is cleared as the SPI IN FIFO data reads.
data shifting is completed.
The SSE bit will be kept at 1 if the communication is still undergoing. This flag
must be cleared as the shifting is completed. Users can determine if the next write
attempt is available.
Universal Serial Bus Series Microcontroller
EM78P613
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