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MCF52235 Datasheet(PDF) 23 Page - Freescale Semiconductor, Inc |
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MCF52235 Datasheet(HTML) 23 Page - Freescale Semiconductor, Inc |
23 / 54 page MCF52235 Family Configurations MCF52235 ColdFire Microcontroller, Rev. 6 Freescale Semiconductor 23 1.7 Queued Serial Peripheral Interface (QSPI) Table 8 describes QSPI signals. 1.8 Fast Ethernet Controller EPHY Signals Table 9 describes the Fast Ethernet Controller (FEC) signals. Table 8. Queued Serial Peripheral Interface (QSPI) Signals Signal Name Abbreviation Function I/O QSPI Synchronous Serial Output QSPI_DOUT Provides the serial data from the QSPI and can be programmed to be driven on the rising or falling edge of QSPI_CLK. O QSPI Synchronous Serial Data Input QSPI_DIN Provides the serial data to the QSPI and can be programmed to be sampled on the rising or falling edge of QSPI_CLK. I QSPI Serial Clock QSPI_CLK Provides the serial clock from the QSPI. The polarity and phase of QSPI_CLK are programmable. O Synchronous Peripheral Chip Selects QSPI_CS[3:0] QSPI peripheral chip selects that can be programmed to be active high or low. O Table 9. Fast Ethernet Controller (FEC) Signals Signal Name Abbreviation Function I/O Twisted Pair Input + RXP Differential Ethernet twisted-pair input pin. This pin is high-impedance out of reset. I Twisted Pair Input - RXN Differential Ethernet twisted-pair input pin. This pin is high-impedance out of reset. I Twisted Pair Output + TXN Differential Ethernet twisted-pair output pin. This pin is high-impedance out of reset. O Twisted Pair Output - TXP Differential Ethernet twisted-pair output pin. This pin is high-impedance out of reset. O Bias Control Resistor RBIAS Connect a 12.4 k Ω (1.0%) external resistor, RBIAS, between the PHY_RBIAS pin and analog ground. Place this resistor as near to the chip pin as possible. Stray capacitance must be kept to less than 10 pF (>50 pF causes instability). No high-speed signals can be permitted in the region of RBIAS. I Activity LED ACT_LED Indicates when the EPHY is transmitting or receiving O Link LED LINK_LED Indicates when the EPHY has a valid link O Speed LED SPD_LED Indicates the speed of the EPHY connection O Duplex LED DUPLED Indicates the duplex (full or half) of the EPHY connection O Collision LED COLLED Indicates if the EPHY detects a collision O Transmit LED TXLED Indicates if the EPHY is transmitting O Receive LED RXLED Indicates if the EPHY is receiving O |
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