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i.MX27L Datasheet(PDF) 28 Page - Freescale Semiconductor, Inc |
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i.MX27L Datasheet(HTML) 28 Page - Freescale Semiconductor, Inc |
28 / 148 page i.MX27 and i.MX27L Data Sheet, Rev. 1.5 28 Freescale Semiconductor Signal Descriptions SDCKE1 SDRAM Clock Enable 1 SDCLK SDRAM Clock SDCLK_B SDRAM Clock_B NFWE_B NFC Write enable signal, multiplexed with ETMPIPESTAT2; PF6 NFRE_B NFC Read enable signal, multiplexed with ETMPIPESTAT1; PF5 NFALE NFC Address latch signal, multiplexed with ETMPIPESTAT0; PF4 NFCLE NFC Command latch signal, multiplexed with ETMTRACEPKT0; PF1 NFWP_B NFC Write Permit signal, multiplexed with ETMTRACEPKT1; PF2 NFCE_B NFC Chip enable signal, multiplexed with ETMTRACEPKT2; PF3 NFRB NFC read Busy signal, multiplexed with ETMTRACEPKT3; PF0 D[15:0] Data Bus signal, shared with EMI, PCMCIA, and NFC PC_CD1_B PCMCIA card detect signal, multiplexed with ATA ATA_DIOR signal; PF20 PC_CD2_B PCMCIA card detect signal, multiplexed with ATA ATA_DIOW signal; PF19 PC_WAIT_B PCMCIA WAIT signal, multiplexed with ATA ATA_CS1 signal; PF18 PC_READY PCMCIA READY/IRQ signal, multiplexed with ATA ATA_CS0 signal; PF17 PC_PWRON PCMCIA signal, multiplexed with ATA ATA_DA2 signal; PF16 PC_VS1 PCMCIA voltage sense signal, multiplexed with ATA ATA_DA1 signal; PF14 PC_VS2 PCMCIA voltage sense signal, multiplexed with ATA ATA_DA0 signal; PF13 PC_BVD1 PCMCIA Battery voltage detect signal, multiplexed with ATA ATA_DMARQ signal; PF12 PC_BVD2 PCMCIA Battery voltage detect signal, multiplexed with ATA ATA_DMACK signalPF11 PC_RST PCMCIA card reset signal, multiplexed with ATA ATA_RESET_B signal; PF10 IOIS16 PCMCIA mode signal, multiplexed with ATA ATA_INTRQ signal; PF9 PC_RW_B PCMCIA read write signal, multiplexed with ATA ATA_IORDY signal; PF8 PC_POE PCMCIA output enable signal, multiplexed with ATA ATA_BUFFER_EN signal; PF7 Clocks and Resets CLKO Clock Out signal selected from internal clock signals. Refer to the clock controller for internal clock selection; PF15. EXT_60M This is a special factory test signal. To ensure proper operation, connect this signal to ground. EXT_266M This is a special factory test signal. To ensure proper operation, connect this signal to ground. OSC26M_TEST This is a special factory test signal. To ensure proper operation, leave this signal as a no connect. RESET_IN Master Reset—External active low Schmitt trigger input signal. When this signal goes active, all modules (except the reset module, SDRAMC module, and the clock control module) are reset. Table 3. i.MX27/MX27L Signal Descriptions (continued) Pad Name Function/Notes |
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