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CYUSB3014-BZXI Datasheet(PDF) 8 Page - Cypress Semiconductor |
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CYUSB3014-BZXI Datasheet(HTML) 8 Page - Cypress Semiconductor |
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8 / 40 page  CYUSB301X Document Number: 001-52136 Rev. *L Page 8 of 40 Boot Options FX3 can load boot images from various sources, selected by the configuration of the PMODE pins. Following are the FX3 boot options: ■ Boot from USB ■ Boot from I 2C ■ Boot from SPI (SPI devices supported are M25P16 (16 Mbit), M25P80 (8 Mbit), and M25P40 (4 Mbit)) or their equivalents ■ Boot from GPIF II ASync ADMux mode ■ Boot from GPIF II Sync ADMux mode ■ Boot from GPIF II ASync SRAM mode Reset Hard Reset A hard reset is initiated by asserting the Reset# pin on FX3. The specific reset sequence and timing requirements are detailed in Figure 18 on page 34 and Table 17 on page 33. All I/Os are tristated during a hard reset. Soft Reset In a soft reset, the processor sets the appropriate bits in the PP_INIT control register. There are two types of Soft Reset: ■ CPU Reset – The CPU Program Counter is reset. Firmware does not need to be reloaded following a CPU Reset. ■ Whole Device Reset – This reset is identical to Hard Reset. ■ The firmware must be reloaded following a Whole Device Reset. Clocking FX3 allows either a crystal to be connected between the XTALIN and XTALOUT pins or an external clock to be connected at the CLKIN pin. The XTALIN, XTALOUT, CLKIN, and CLKIN_32 pins can be left unconnected if they are not used. Crystal frequency supported is 19.2 MHz, while the external clock frequencies supported are 19.2, 26, 38.4, and 52 MHz. FX3 has an on-chip oscillator circuit that uses an external 19.2-MHz (±100 ppm) crystal (when the crystal option is used). An appropriate load capacitance is required with a crystal. Refer to the specification of the crystal used to determine the appro- priate load capacitance. The FSLC[2:0] pins must be configured appropriately to select the crystal- or clock-frequency option. The configuration options are shown in Table 3. Clock inputs to FX3 must meet the phase noise and jitter require- ments specified in Table 4 on page 9. The input clock frequency is independent of the clock and data rate of the FX3 core or any of the device interfaces (including P-Port and S-Port). The internal PLL applies the appropriate clock multiply option depending on the input frequency. Table 2. FX3 Booting Options PMODE[2:0][2] Boot From F00 Sync ADMux (16-bit) F01 Async ADMux (16-bit) F11 USB boot F0F Async SRAM (16-bit) F1F I2C, On Failure, USB Boot is Enabled 1FF I2C only 0F1 SPI, On Failure, USB Boot is Enabled Note 2. F indicates Floating. Table 3. Crystal/Clock Frequency Selection FSLC[2] FSLC[1] FSLC[0] Crystal/Clock Frequency 0 0 0 19.2-MHz crystal 1 0 0 19.2-MHz input CLK 1 0 1 26-MHz input CLK 1 1 0 38.4-MHz input CLK 1 1 1 52-MHz input CLK |
Similar Part No. - CYUSB3014-BZXI |
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Similar Description - CYUSB3014-BZXI |
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