2.14 Serial Peripheral Interface (SPI) Characteristics

This section describes the DC and switching of the SPI interface. Unless otherwise noted, all output characteristics given for a 35 pF load on the pins and all sequential timing characteristics are related to SPI_x_CLK. For timing parameter definitions, see 2.14 Serial Peripheral Interface (SPI) Characteristics.

Table 2-101. SPI Characteristics Military-Case Conditions: TJ = 125 °C, VDD = 1.425V, –1 Speed Grade (Continued)
SymbolDescription and ConditionA2F0603A2F500Unit
sp1SPI_x_CLK minimum period
SPI_x_CLK = PCLK/22020ns
SPI_x_CLK = PCLK/44040ns
SPI_x_CLK = PCLK/88080ns
SPI_x_CLK = PCLK/160.160.16µs
SPI_x_CLK = PCLK/320.320.32µs
SPI_x_CLK = PCLK/640.640.64µs
SPI_x_CLK = PCLK/1281.281.28µs
SPI_x_CLK = PCLK/2562.562.56µs
sp2SPI_x_CLK minimum pulse width high
SPI_x_CLK = PCLK/21010ns
SPI_x_CLK = PCLK/42020ns
SPI_x_CLK = PCLK/84040ns
SPI_x_CLK = PCLK/160.080.08µs
SPI_x_CLK = PCLK/320.160.16µs
SPI_x_CLK = PCLK/640.320.32µs
SPI_x_CLK = PCLK/1280.640.64µs
SPI_x_CLK = PCLK/2561.281.28us
sp3SPI_x_CLK minimum pulse width low
SPI_x_CLK = PCLK/21010ns
SPI_x_CLK = PCLK/42020ns
SPI_x_CLK = PCLK/84040ns
SPI_x_CLK = PCLK/160.080.08µs
SPI_x_CLK = PCLK/320.160.16µs
SPI_x_CLK = PCLK/640.320.32µs
SPI_x_CLK = PCLK/1280.640.64µs
SPI_x_CLK = PCLK/2561.281.28µs
sp4SPI_x_CLK, SPI_x_DO, SPI_x_SS rise time (10%-90%) 14.74.7ns
sp5SPI_x_CLK, SPI_x_DO, SPI_x_SS fall time (10%-90%) 13.43.4ns
sp6Data from master (SPI_x_DO) setup time 211pclk cycles
sp7Data from master (SPI_x_DO) hold time 211pclk cycles
sp8SPI_x_DI setup time 111pclk cycles
sp9SPI_x_DI hold time 211pclk cycles
Note:
  1. These values are provided for a load of 35 pF. For board design considerations and detailed output buffer resistances, use the corresponding IBIS models located on the Microchip website.
  2. For allowable pclk configurations, refer to the Serial Peripheral Interface Controller section in the SmartFusion Microcontroller Subsystem User’s Guide.
  3. Device A2F060 is discontinued.
Figure 2-58. SPI Timing for a Single Frame Transfer in Motorola Mode (SPH = 1)