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ENA2263 Datasheet(PDF) 6 Page - ON Semiconductor |
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ENA2263 Datasheet(HTML) 6 Page - ON Semiconductor |
6 / 23 page LE25U81AFD No.A2263-6/23 Device Operation The read, erase, program and other required functions of the device are executed through the command registers. The serial I/O corrugate is shown in Figure 3 and the command list is shown in Table 2. At the falling CS edge the device is selected, and serial input is enabled for the commands, addresses, etc. These inputs are normalized in 8 bit units and taken into the device interior in synchronization with the rising edge of SCK, which causes the device to execute operation according to the command that is input. The LE25U81AFD supports both serial interface SPI mode 0 and SPI mode 3. At the falling CS edge, SPI mode 0 is automatically selected if the logic level of SCK is low, and SPI mode 3 is automatically selected if the logic level of SCK is high. Figure 3 I/O waveforms Table 2 Command Settings Command 1st bus cycle 2nd bus cycle 3rd bus cycle 4th bus cycle 5th bus cycle 6th bus cycle Nth bus cycle Read 03h A23-A16 A15-A8 A7-A0 RD *1 RD *1 RD *1 High Speed Read 0Bh A23-A16 A15-A8 A7-A0 X RD *1 RD *1 Dual Output Read 3Bh A23-A16 A15-A8 A7-A0 Z RD *1 RD *1 Dual I/O Read BBh A23-A8 A7-A0, X, Z RD *1 RD *1 RD *1 RD *1 Small sector erase 20h / D7h A23-A16 A15-A8 A7-A0 Sector erase D8h A23-A16 A15-A8 A7-A0 Chip erase 60h / C7h Page program 02h A23-A16 A15-A8 A7-A0 PD *2 PD *2 PD *2 Write enable 06h Write disable 04h Power down B9h Status register read 05h Status register write 01h DATA JEDEC ID read 9Fh ID read ABh X X X power down B9h Exit power down mode ABh Explanatory notes for Table 2 "X" signifies "don't care" (that is to say, any value may be input). The "h" following each code indicates that the number given is in hexadecimal notation. Addresses A23 to A20 for all commands are "Don't care". *1: "RD" stands for read data. *2: "PD" stands for page program data. CS SCK SO SI 1st bus 8CLK Mode0 Mode3 2nd bus DATA MSB (Bit7) DATA LSB (Bit0) |
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