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VRS51L3074

Ramtron Corporation
Part Number VRS51L3074
Manufacturer Ramtron Corporation
Description FRAM-enhanced high performance 8051-based microcontroller coupled
Published Aug 3, 2007
Detailed Description www.DataSheet4U.com VRS51L3074 9 SPI Interface The SPI interface of the VRS51L3074’s provides numerous enhancements co...
Datasheet PDF File VRS51L3074 PDF File

VRS51L3074
VRS51L3074

Overview
www.
DataSheet4U.
com VRS51L3074 9 SPI Interface The SPI interface of the VRS51L3074’s provides numerous enhancements compared to other vendor offerings.
The SPI interface’s key features include: • • • • • • • • Supports four standard SPI modes (clock phase/polarity) Operates in master and slave modes Automatic control of up to four chip select lines Configurable transaction size (1 to 32 bits) Transaction size of >32 bits is possible Double Rx and TX data buffers Configurable MSB or LSB first transaction Generation frame select/load signals 9.
1 SPI Control Registers The SPICTRL register controls the operating modes of the SPI interface in master mode.
TABLE 97:SPI CONTROL REGISTER - SPICTRL SFR C1H 7 R/W 0 6 R/W 0 5 R/W 0 4 R/W 0 3 R/W 0 2 R/W 0 1 R/W 0 0 R/W 1 Bit 7 Mnemonic SPICLK[2:0] Description SPI Communication Speed (Master Mode) 000 = Sys Clk / 2 ( / 8 if SPISLOW = 1) 001 = Sys Clk / 4 ( / 16 if SPISLOW = 1) 010 = Sys Clk / 8 ( / 32 if SPISLOW = 1) 011 = Sys Clk ...


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