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CY15B102QN Datasheet(PDF) 18 Page - Infineon Technologies AG |
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CY15B102QN Datasheet(HTML) 18 Page - Infineon Technologies AG |
18 / 43 page Datasheet 18 of 43 002-19073 Rev. *N 2022-01-20 2Mb EXCELON™ Auto Ferroelectric RAM (F-RAM) Serial (SPI), 256K × 8, automotive grade 1 Functional description 6.1.6.2 Special sector read (SSRD, 4Bh) After the falling edge of CS, the bus master can issue an SSRD opcode. Following the SSRD command is a three-byte address containing the 8-bit address (A7–A0) of the first byte of the special sector read operation. The upper 16 bits of the address are ignored. After the opcode and address are issued, the device drives out the read data on the next eight clocks. The SI input is ignored during read data bytes. Subsequent bytes are data bytes, which are read out sequentially. Addresses are incremented internally as long as the bus master continues to issue clocks and CS is LOW. Once the internal address counter auto increments to XXXFFh, CS should toggle HIGH to terminate the ongoing SSRD operation. Data is read on MSb first. The rising edge of CS terminates a special sector read operation and tristates the SO pin. The CY15X102QN special sector read operation is shown in Figure 14. Note The special sector F-RAM memory guarantees to retain data integrity up to three cycles of standard reflow soldering. Figure 14 Special sector read operation 6.1.7 Identification and serial number commands 6.1.7.1 Read device ID (RDID, 9Fh) The CY15X102QN device can be interrogated for its manufacturer, product identification, and die revision. The RDID opcode 9Fh allows the user to read the 9-byte manufacturer ID and product ID, both of which are read-only bytes. The JEDEC-assigned manufacturer ID places the CYPRESS™ (Ramtron) identifier in bank 7; therefore, there are six bytes of the continuation code 7Fh followed by the single byte C2h. There are two bytes of product ID, which includes a family code, a density code, a sub code, and the product revision code. Table 6 shows 9-Byte Device ID field description. Refer to “Ordering information” on page 35 for 9-Byte device ID of an individual part. The CY15X102QN read device ID operation is shown in Figure 15. Note The least significant data byte (Byte 0) shifts out first and the most significant data byte (Byte 8) shifts out last. Table 7 9-byte device ID Device ID field description Manufacturer ID [71:16] Family [15:13] Density [12:9] Inrush [8] Sub type [7:5] Revision [4:3] Voltage [2] Frequency [1:0] 56-bit 3-bit 4-bit 1-bit 3-bit 2-bit 1-bit 2-bit 0 123 4 5 67 CS SI SCK 0 1 23 45 6 7 SO 01 00 1 0 1 1 D7 D6 D5 D4 D3 D2 D1 D0 Hi-Z Hi-Z MSB LSB Opcode (4Bh) Read Data A23 0 123 4 21 22 23 A22 A20 A21 A3 A2 A1 A0 Address 20 |
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