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S25FL128P Datasheet(PDF) 18 Page - Cypress Semiconductor |
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S25FL128P Datasheet(HTML) 18 Page - Cypress Semiconductor |
18 / 44 page Document Number: 002-00646 Rev. *M Page 19 of 45 S25FL128P 11.4 Read Manufacturer and Device ID (READ_ID: 90h) 11.4.1 Serial Mode The READ_ID (90h) instruction identifies the Device Manufacturer ID and the Device ID. The instruction is initiated by driving the CS# pin low and shifting in (via the SI input pin) the instruction code “90h” followed by a 24-bit address of XXXXX0h. (X: High or Low) Following this, the Manufacturer ID and the Device ID are shifted out on SO output pin starting after the falling edge of the SCK serial clock input signal. The Manufacturer ID and the Device ID are always shifted out on the SO output pin with the MSB first, as shown in Figure 11.6. If the 24-bit address is set to XXXXX1h, then the Device ID is read out first followed by the Manufacturer ID. Note that the upper 23 bits of the address do not have to be 0’s and can be don’t cares. Once the device is in READ_ID mode, the Manufacturer ID and Device ID output data toggles between address 000000H and 000001H until terminated by a low to high transition on the CS# input pin. After the first 24-bit address is provided, the user must wait 16 clock cycles for both the Manufacturer ID and Device ID to be output on the SO output pin. The maximum clock frequency for the READ_ID (90h) command is at 104MHz (Fast Read). Parallel Mode the maximum clock frequency is 10 MHz. The Manufacturer ID & Device ID is output continuously until terminated by a low to high transition on CS# chip select input pin. After issuing READ_ID instruction, driving the CS# chip select input pin to the logic high state will automatically send the device into the standby mode. Driving the CS# chip select input pin to the logic low state again will automatically send the device out of the standby mode and into the active mode. Figure 11.6 Serial READ_ID Instruction Sequence Table 11.1 Manufacturer & Device Identification, RDID (9Fh) Device Manufacturer Identification Device Identification Extended Device Identification Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Uniform 256 KB Sector 01h 20h 18h 03h 00h Uniform 64 KB Sector 01h 20h 18h 03h 01h CS# SCK SI SO High Impedance 24-Bit Address High Impedance Instruction 90h 01234567 23 22 21 20 19 18 17 16 8 9 10 11 12 13 14 15 15 14 13 12 11 10 9 8 16 17 18 19 20 21 22 23 CS# SCK SI SO High Impedance Manufacturer ID Device ID 24-Bit Address MSB MSB 76543210 765432107654321 0 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 |
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