LE25S161 datasheet(20/54 Pages) ONSEMI

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LE25S161

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Standard SPI Read

There are two Read commands, "Low-Power Read (RDLP: 03h)" and "High-Speed Read (RDHS: 0Bh)".

10-5. Standard SPI Read

There are two Read commands, Low-Power Read (RDLP) and High-Speed Read (RDHS).

10-5-1. Low-Power Read command (RDLP)

Maximum Clock frequency: 33.33MHz

This command is for reading data out.

"Figure 6. Low-Power Read (RDLP)" shows the timing waveforms.

The sequence of RDLP operation :

CS goes to low  input RDLP command (03h)  3 Byte address (A23-A0) input on SI

 the corresponding data out on SO

 continuous data out (n-byte) 

 completed by CS=high

* The data output starts from the falling edge of SCK(31th clock)

The Address is latched on rising edge of SCK, and the corresponding data is shifted out on SO by the falling edge of SCK.

The address is automatically incremented to the next higher address after each byte data is shifted out. If the SCK input is

continued after the internal address arrives at the highest address (1FFFFFh), the internal address returns to the lowest

address (000000h). By setting CS to high, the device is deselected, and the read cycle is completed. While the device is

deselected, the output pin SO is in a high-impedance state.

Figure 6. Low-Power Read (RDLP)

● Address A23 to A21 are "Don't care".

Add

(A7-A0)

Add

(A15-A8)

Add

(A23-A16)

Byte 3

Byte 2

Byte 1

High Impedance

DATA

SCK

03h

MSB

8CLK

Mode0

Mode3

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