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ST72681 Datasheet(PDF) 8 Page - STMicroelectronics |
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ST72681 Datasheet(HTML) 8 Page - STMicroelectronics |
8 / 32 page Application schematics ST72681 8/32 3 Application schematics ST72681/R20 only supports single NAND Flash Chip Enable configuration (one NAND device with one Chip Enable signal). Note that pins NAND_RnB2, NAND_CE2, NAND_CE3 and NAND_CE4 should remain unconnected. ST72681/R21 can support up to four NAND Flash Chip Enable signals. The application can use one of the following configurations: ● One NAND device with four Chip Enable signals; NAND_CE1, NAND_CE2, NAND_CE3 and NAND_CE4 are used. ● One NAND device with two Chip Enable signals; NAND_CE1 and NAND_CE2 are used. ● One NAND device with one Chip Enable signal; only NAND_CE1 is used. ● Two NAND devices with two Chip Enable signals; NAND_CE1 and NAND_CE2 are used to select the first NAND device and NAND_CE3 and NAND_CE4 to select the second NAND device. ● Two NAND devices with one Chip Enable signal; NAND_CE1 and NAND_CE2 are used to select is used to select the first NAND device and the 2nd NAND device, respectively. ● 4 NAND devices with 1Chip Enable signal; NAND_CE1 selects the first NAND device, NAND_CE2 the 2nd NAND device, NAND_CE3 to select the third, and NAND_CE4 to select the fourth NAND device. Figure 3. Application schematic LED2 RED L ED R2 220 V33 LED1 GREEN L ED R1 220 LED2 LED1 C13 10nF C11 470nF RESET RO S1 Read O nly NAND_RnB C16 18pF C15 18pF VBUS 1 D- 2 D+ 3 GND 4 J1 USB CO N USB_V5 R5 11. 3K 1% C1 100nF DM DP C8 10nF C6 10nF C9 10nF C12 10nF R4 10K R3 4. 7K C5 220nF V33 V18_USB V18_USB V18_USB C2 1uF + C4 4. 7uF Vin 1 INHIBIT 3 Vout 5 GND 2 BYPASS 4 U1 LD3985M33R_SOT23- 5L USB_V5 C3 10nF V33 V33 On BoardFlash1 U2 C7 10nF C10 10nF On BoardFlash2 NAND_RnB2 V33 V33 R_Toshiba_config R_Multi_CE_config V33 2 3 1 4 XT1 CRYSTAL 12M H_NX4025DA Vin 3 Vout 2 GND UU1 AM E8800_SO T23 R6 500 R7 0 R8 0 NAND W P 36 READ O NL Y 35 EEPRO M SCL 34 VSS_3 25 RESET 29 VSS_2 33 VDD33_2 32 NC 31 NC 30 LED2 28 LED1 27 NAND AL E 26 VDDA 1 OSCIN 2 OSCOUT 3 VSSA 4 RREF 5 VSSBL 11 USBDP 9 USBDM 10 VDD3 8 VDDBL 12 VSSC 6 VDDC 7 U? ST72681_QF P48 V33 C17 100nF V33 C14 10nF U3 V33 V33 R_Single_CE_config R_Dual_CE_config R9 0 R10 0 NAND_CE2 NAND_CE3 U5 V33 V33 On BoardFlash4 U4 V33 V33 On BoardFlash3 C18 100nF C19 100nF C20 100nF C21 100nF V33 V33 Decoupling capacitors to be located close to U1 V33 inputs V33 Decoupling capacitors to be located close to U2,U3,U4 & U5 V33 inputs NAND_W P NAND_W P NAND_W P NAND_W P On Board Flash 2-4 only available on ST72681 /R21 |
Número de pieza similar - ST72681_07 |
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Descripción similar - ST72681_07 |
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