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IS25CD025-JDLE Datasheet(PDF) 10 Page - Integrated Silicon Solution, Inc |
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IS25CD025-JDLE Datasheet(HTML) 10 Page - Integrated Silicon Solution, Inc |
10 / 32 page IS25CD025 Integrated Silicon Solution, Inc.- www.issi.com Rev. G 07/31/2013 10 DEVICE OPERATION (CONTINUED) RDID COMMAND (READ PRODUCT IDENTIFICATION) OPERATION The Read Product Identification (RDID) instruction is for reading out the old style of 8-bit Electronic Signature, whose values are shown as table of ID Definitions. This is not same as RDID or JEDEC ID ins truction. It’s not recommended to use for new design. For new design, please use RDID or JEDEC ID instruction. The RDES instruction code is followed by three dummy bytes, each bit being latched-in on SI during the rising edge of SCK. Then the Device ID is shifted out on SO with the MSB first, each bit been shifted out during the falling edge of SCK. The RDES instruction is ended by CE# goes high. The Device ID outputs repeatedly if continuously send the additional clock cycles on SCK while CE# is at low. Table 11. Product Identification Product Identification Data Manufacturer ID First Byte 9Dh Second Byte 7Fh Device ID: Device ID 1 Device ID 2 IS25CD025 02h 2Fh Figure 3. Read Product Identification Sequence 0 1 8 31 38 39 46 47 54 HIGH IMPEDANCE Device ID1 Device ID1 Device ID1 SCK CE# SI SO INSTRUCTION 9 7 1010 1011b 3 Dummy Bytes |
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