LE25S161 datasheet(30/54 Pages) ONSEMI

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LE25S161

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10-13. Read ID

Read ID is an operation that reads the manufacturer code (RJID) and device ID information (RID). These Read ID

commands are not accepted during writing. There are two methods of reading the silicon ID, each of which is assigned a

device ID.

10-13-1. Read JEDEC ID (RJID)

This command (RJID) is compatible with the JEDEC standard for SPI compatible serial memories.

"Table 6. JEDEC ID codes" lists the silicon ID codes.

"Figure 17. Read JEDEC ID (RJID)" shows the timing waveforms.

The sequence of RJID operation :

CS goes to low  input RJID command (9Fh)

 Manufacture code (62h) out on SO  Memory type code (16h) out on SO

 Memory capacity code out on SO (15h)  Reserve code (00h) 

 completed by CS=high

* The 4-byte code is output repeatedly as long as clock inputs are present

* The data output starts from the falling edge of SCK(7th clock)

By setting CS to high, the device is deselected, and Read JEDEC ID cycle is completed. While the device is deselected,

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

Table 6. JEDEC ID codes

Output code

Manufacturer code

62h

2 byte device ID

Memory type

16h

Memory capacity code

15h (16M Bit)

Reserve code

00h

High Impedance

15h

16h

62h

SCK

9Fh

MSB

8CLK

Mode0

Mode3

00h

MSB

62h

MSB

Figure 17. Read JEDEC ID (RJID)

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