FT25C32A-USR-T

Fremont Micro Devices FT25C32A DS SPI Serial EEPROM 32K (8-bit wide) FEATURES  Serial Peripheral Interface (SPI) Compatible  Supports SPI Modes 0 (0,0) and 3 (1,1)   Data Sheet Describes Mode 0 Operation Low voltage and low power operations  FT25C32A VCC = 1.8V to 5.5V  20MHz clock rate (5V)  Partial page write operation allowed (32 bytes page write mode)  Self-timed programming cycle (5 ms max)  Block Write Protection (Protect 1/4, 1/2, or Entire Array)  Write protect pin for hardware data protection  High reliability: typically 1,000,000 cycles endurance  100 years data retention  Industrial temperature range (-40℃ to 85℃)  Standard 8-pin DIP/SOP/TSSOP Pb-free packages DESCRIPTION The FT25C32A is 32768 bits of serial Electrical Erasable and Programmable Read Only Memory, commonly known as EEPROM. They are organized as 4096 words of 8 bits (1 byte) each. The devices are fabricated with proprietary advanced CMOS process for low power and low voltage applications. These devices are available in standard 8-lead DIP, 8-lead SOP and 8-lead TSSOP packages. The memory is accessed via a simple Serial Peripheral Interface (SPI) compatible serial bus. The HOLD pin may be used to suspend any serial communication without resetting the serial sequence. While the device is paused, transitions on its inputs will be ignored. Our extended VCC range (1.8V to 5.5V) devices enables wide spectrum of applications. PIN CONFIGURATION © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A - Page1 Fremont Micro Devices Pin Name FT25C32A DS Pin Function Pin Name Pin Function CS Chip Select GND Ground SCL Serial Clock Input VCC Power Supply SI Serial Data Input WP Write Protest SO Serial Data Output HOLD Suspends Serial Input All these packaging types come in conventional or Pb-free certified. FT25C32A CS 1 SO WP GND 2 3 4 8 7 6 5 VCC HOLD SCL SI 8L DIP 8L SOP 8L TSSOP Figure 1: Packaging Types ABSOLUTE MAXIMUM RATINGS Industrial operating temperature………………………………………………………………………-40℃ to 85℃ Storage temperature………………………………………………………………………………….-50℃ to 125℃ Input voltage on any pin relative to ground……………………………………………………-0.3V to VCC + 0.3V Maximum voltage……………………………………………………………………………………………………8V ESD protection on all pins……………………………………………………………………………………>2000V * Stresses exceed those listed under “Absolute Maximum Rating” may cause permanent damage to the device. Functional operation of the device at conditions beyond those listed in the specification is not guaranteed. Prolonged exposure to extreme conditions may affect device reliability or functionality. Block Diagram © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A-Page2 Fremont Micro Devices FT25C32A DS VCC STATUS REGISTER GND MEMORY ARRAY ADDRESS DECODER DATA REGISTER SI CS WP SCK OUTPUT BUFFER MODE DECODE LOGIC CLOCK GENERATOR SO HOLD Figure 2: Block Diagram © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A-Page3 Fremont Micro Devices FT25C32A DS PIN DESCRIPTIONS (A) CHIP SELECT ( CS ) The FT25C32A is selected when the CS pin is low. When the device is not selected, data will not be accepted via the SI pin, and the serial output pin (SO) will remain in a high impedance state. (B) Serial Input (SI) The SI pin is used to transfer data into the device. It receives instructions, addresses, and data. Data is latched on the rising edge of the serial clock. (C)Serial Output (SO) The SO pin is used to transfer data out of the FT25C32A. During a read cycle, data is shifted out on this pin after the falling edge of the serial clock. (D) Serial Clock (SCK) The SCK is used to synchronize the communication between a master and the FT25C32A. Instructions, addresses, or data present on the SI pin are latched on the rising edge of the clock input, while data on the SO pin is updated after the falling edge of the clock input. (E) Write Protect ( WP ) This pin is used in conjunction with the WPEN bit in the status register to prohibit writes to the non-volatile bits in the status register. When WP is low and WPEN is high, writing to the non-volatile bits in the status register is disabled. All other operations function normally. When WP is high, all functions, including writes to the non-volatile bits in the status register operate normally. If the WPEN bit is set, WP low during a status register write sequence will disable writing to the status register. If an internal write cycle has already begun, WP going low will have no effect on the write. The WP pin function is blocked when the WPEN bit in the status register is low. This allows the user to install the FT25C32A in a system with WP pin grounded and still be able to write to the status register. The WP pin functions will be enabled when the WPEN bit is set high. (F) Hold ( HOLD ) The HOLD pin is used in conjunction with the CS pin to select the FT25C32A. When the device is selected and a serial sequence is underway, HOLD can be used to pause the serial communication with the master device without resetting the serial sequence. To pause, the HOLD pin must be brought low while the SCK pin is low. To resume serial communication, the HOLD pin is brought high while the SCK pin is low (SCK may still toggle during HOLD ). Inputs to the SI pin will be ignored while the SO pin is in the high impedance state. MEMORY ORGANIZATION The FT25C32A devices have 128 pages respectively. Since each page has 32 bytes, random word addressing to FT25C32A will require 12 bits data word addresses respectively. © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A-Page4 Fremont Micro Devices FT25C32A DS DEVICE OPERATION The FT25C32A utilizes an 8-bit instruction register. The list of instructions and their operation codes are contained in Table A. All instructions, addresses, and data are transferred with the MSB first and start with a high-to-low CS transition. Table A Instruction Set for the FT25C32A Instruction Name Instruction Format Operation WREN 0000 X110 Set Write Enable Latch WRDI 0000 X100 Reset Write Enable Latch RDSR 0000 X101 Read Status Register WRSR 0000 X001 Write Status Register READ 0000 X011 Read Data from Memory Array WRITE 0000 X010 Write Data to Memory Array (A) STATUS REGISTER OPERATION Table B Status Register Format Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit2 Bit 1 Bit 0 WPEN X X X BP1 BP0 WEN RDY WRITE ENABLE (WREN): The device will power up in the write disable state when VCC is applied. All programming instructions must therefore be preceded by a Write Enable instruction. WRITE DISABLE (WRDI): To protect the device against inadvertent writes, the Write Disable instruction disables all programming modes. The WRDI instruction is independent of the status of the WP pin. READ STATUS REGISTER (RDSR): The Read Status Register instruction provides access to the status register. The READY/BUSY and Write Enable status of the device can be determined by the RDSR instruction. Similarly, the block write protection bits indicate the extent of protection employed. These bits are set by using the WRSR instruction. Table C Status Register Bit Definition Bit Bit 0 ( RDY ) Bit 1 (WEN) Definition Bit 0 = “0” ( RDY ) indicates the device is READY. Bit 0 = “1” indicates the write cycle is in progress. Bit 1= “0” indicates the device is not WRITE ENABLED. Bit 1 = “1” indicates the device is write enabled. Bit 2 (BP0) See table D. Bit 3 (BP1) See table D. Bits 4-6 are “0”s when device is not in an internal write cycle. Bit 7 (WPEN) See table E. Bits 0-7 are “1” during an internal write cycle. © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A-Page5 Fremont Micro Devices FT25C32A DS WRITE STATUS REGISTER (WRSR): The WRSR instruction allows the user to select one of four levels of protection. The FT25C32A is divided into four array segments. One-quarter, one-half, or all of the memory segments can be protected. Any of the data within any selected segment will therefore be read only. The block write protection levels and corresponding status register control bits are shown in Table D. The three bits BP0, BP1, and WPEN are nonvolatile cells that have the same properties and functions as the regular memory cells. Table D Block Write Protect Bits Level Status Register Bits Array Address Protected BP1 BP0 0 0 0 None 1(1/4) 0 1 0C00-0FFF 2(1/2) 1 0 0800-0FFF 3(All) 1 1 0000-0FFF The WRSR instruction also allows the user to enable or disable the write protect ( WP ) pin through the use of the Write Protect Enable (WPEN) bit. Hardware write protection is enabled when the WP pin is low and the WPEN bit is “1”. Hardware write protection is disabled when either the WP pin is high or the WPEN bit is “0”. When the device is hardware write protected, writes to the status register, including the block protect bits and the WPEN bit, and the block-protected sections in the memory array are disabled. Writes are only allowed to sections of the memory that are not block-protected. NOTE: When the WPEN bit is hardware write protected, it cannot be changed back to “0” as long as the WP pin is held low. Table E WPEN Operation WPEN WP WEN 0 X 0 Protected Unprotected Status Register Blocks Blocks 0 Protected Protected Protected X 1 Protected Writeable Writeable 1 Low 0 Protected Protected Protected 1 Low 1 Protected Writeable Protected X High 0 Protected Protected Protected X High 1 Protected Writeable Writeable (B) EEPROM OPERATION READ SEQUENCE (READ): Reading the FT25C32A via the serial output (SO) pin requires the following sequence. After the CS line is pulled low to select a device, the read op-code is transmitted via the SI line followed by the byte address to be read (A15−A0, see Table F). Upon completion, any data on the SI line will be ignored. The data (D7−D0) at the specified address is then shifted out onto the SO line. If only one byte is to be read, the CS line should be driven high after the data comes out. The read sequence can be continued since the byte address is automatically incremented and data will continue to be shifted out. When the highest address is reached, the address counter will roll over to the lowest address (0000h), allowing the entire memory to be read in one continuous read cycle. © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A-Page6 Fremont Micro Devices FT25C32A DS WRITE SEQUENCE (WRITE): In order to program the FT25C32A, two separate instructions must be executed. First, the device must be write enabled via the WREN instruction. Then a Write (WRITE) instruction may be executed. Also, the address of the memory location(s) to be programmed must be outside the protected address field location selected by the block write protection level. During an internal write cycle, all commands will be ignored except the RDSR instruction. A Write instruction requires the following sequence. After the CS line is pulled low to select the device, the WRITE op-code is transmitted via the SI line followed by the byte address (A15−A0) and the data (D7–D0) to be programmed (See Table F). Programming will start after the CS pin is brought high. The low-to-high transition of the CS pin must occur during the SCK low-time immediately after clocking in the D0 (LSB) data bit. The FT25C32A is capable of a 32-byte page write operation. After each byte of data is received, the five low-order address bits are internally incremented by one; the high order bits of the address will remain constant. If more than 32 bytes of data are transmitted, the address counter will roll over and the previously written data will be overwritten. The FT25C32A is automatically returned to the write disable state at the completion of a write cycle. NOTE: If the device is not write enabled (WREN), the device will ignore the write instruction and will return to the standby state, when CS is brought high. A new CS falling edge is required to reinitiate the serial communication. The READY/BUSY status of the device can be determined by initiating a read status register (RDSR) instruction. If Bit 0 = “1”, the write cycle is still in progress. If Bit 0 = “0”, the write cycle has ended. Only the RDSR instruction is enabled during the write programming cycle. Table F Address Key Address FT25C32A AN A11-A0 Don’t Care Bits A15-A12 © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A-Page7 Fremont Micro Devices FT25C32A DS CS tHDN tHDN SCL tHDS tHDS HOLD tHZ SO tLZ Figure 3: HOLD Timing VIH CS tCS VIL tCSH tCSS VIH SCL VIL tWH tSU tWL tH VIH SI VALID IN VIL tHO tV VOH SO tDIS HI-Z HI-Z VOL Figure 4: Synchronous Data Timing (for Mode 0) CS SCL SI SO WREN INST HI-Z Figure 5: WREN Timing © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A-Page8 Fremont Micro Devices FT25C32A DS CS SCL SI WRDI INST HI-Z SO Figure 6: WRDI Timing CS SCL 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 7 6 5 4 3 2 1 0 RDSR INST SI HI-Z SO MSB Figure 7: RDSR Timing CS 0 SCL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 DATA IN SI WRSR INST 7 3 2 HI-Z SO Figure 8: WRSR Timing CS SCL 0 1 2 3 4 5 6 7 8 9 22 15 14 23 24 25 26 27 7 6 5 4 28 29 30 31 1 0 Byte Address SI SO READ INST 1 0 DATA OUT HI-Z 3 2 MSB Figure 9: READ Timing © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A-Page9 Fremont Micro Devices FT25C32A DS CS SCL 0 1 2 3 4 5 6 7 8 9 22 23 24 25 26 27 WRITE INST 15 14 29 30 31 1 0 DATA IN Byte Address SI 28 1 0 7 6 5 4 3 2 HI-Z SO Figure 10: WRITE Timing AC CHARACTERISTICS Applicable over recommended operating range from: TAI =-40℃ to +85℃，VCC = As Specified, CL= 1 TTL Gate and 30 pF (unless otherwise noted) Symbol Parameter FT25C32A 1.8-2.7 V Min Max 2.7-4.5 V Min Max 4.5-5.5 V Min Unit Max fSCK Clock frequency, SCK 5 10 20 MHz tRI Input Rise Time 2 2 2 µs tFI Input Fall Time 2 2 2 µs tWH SCK High Time 80 40 20 ns tWL SCK Low Time 80 40 20 ns tCS CS High Time 100 50 25 ns tCSS CS Setup Time 100 50 25 ns tCSH CS Hold Time 100 50 25 ns tSU Data In Setup Time 20 10 5 ns tH Data In Hold Time 20 10 5 ns tHD HOLD Setup Time 20 10 5 ns tCD HOLD Hold Time 20 10 5 ns tV Output Valid 0 tHO Output Hold Time 0 tLZ HOLD to Output Low Z 0 tHZ HOLD to Output High Z 200 tDIS Output Disable Time tWC Write Cycle Time © 2013 Fremont Micro Devices Inc. 80 0 40 0 100 0 0 20 0 50 ns 25 ns 80 40 ns 200 80 40 ns 5 5 5 ms Confidential Rev 0.82 0 ns DS25C32A-Page10 Fremont Micro Devices FT25C32A DS DC CHARACTERISTICS Applicable over recommended operating range from:TAI =-40℃ to +85℃ ，VCC = +1.8V to +5.5V(unless otherwise noted) Symbol Parameter Test Conditions Min Typical Max Unit VCC1 Supply Voltage 1.8 5.5 V VCC2 Supply Voltage 2.7 5.5 V VCC3 Supply Voltage 4.5 5.5 V ICC1 Supply Current 10.0 mA ICC2 Supply Current 10.0 mA ICC3 Supply Current 6.0 mA ISB1 Standby current VCC = 1.8V, CS = VCC < 1.0 µA ISB2 Standby current VCC = 2.7V, CS = VCC < 1.0 µA ISB3 Standby current VCC = 5.0V, CS = VCC < 1.0 µA IIL Input leakage VIN = VCC or VSS 3.0 µA IOL Output leakage VIN = VCC or VSS 3.0 µA VIL (1) Input low level -0.6 VIH(1) Input high level VCC 0.7 VOL1 Output low level 3.6V≤VCC≤5.5V, IOL = 3.0mA VOH1 Output High level 3.6V≤VCC≤5.5V, IOH =-1.6mA VOL2 Output low level 1.8V≤VCC≤3.6V, IOL = 0.15mA VOH2 Output High level 1.8V≤VCC≤3.6V, IOH =-100uA VCC=5.0V @ 20MHz, SO=Open, Read VCC=5.0V @ 20MHz, SO=Open, Write VCC=5.0V @ 5MHz, SO=Open, Read, Write VCC V 0.3 VCC 0.5  V 0.4 V 0.2 V VCC  VCC  Notes:1. VIL min and VIH max are reference only and are not tested. © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A-Page11 Fremont Micro Devices FT25C32A DS ORDERING INFORMATION: FT25C32A - X X X - X Circuit Type Packaging B: Tube T: Tape and Reel Temp. Range HSF U: -40℃-85℃ R: RoHS G: Green Package D: DIP8 S: SOP8 T: TSSOP8 Density Package DIP8 Temperature Range -40℃-85℃ Vcc 1.8V-5.5V HSF Packaging Ordering Code RoHS Tube FT25C32A-UDR-B Green Tube FT25C32A-UDG-B Tube FT25C32A-USR-B Tape and Reel FT25C32A-USR-T Tube FT25C32A-USG-B Tape and Reel FT25C32A-USG-T Tube FT25C32A-UTR-B Tape and Reel FT25C32A-UTR-T Tube FT25C32A-UTG-B Tape and Reel FT25C32A-UTG-T RoHS SOP8 -40℃-85℃ 1.8V-5.5V 32kbits Green RoHS TSSOP8 -40℃-85℃ 1.8V-5.5V Green © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A-Page12 Fremont Micro Devices FT25C32A DS DIP8 PACKAGE OUTLINE DIMENSIONS Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 3.710 4.310 0.146 0.170 A1 0.510 A2 3.200 3.600 0.126 0.142 B 0.380 0.570 0.015 0.022 B1 0.020 1.524（BSC） 0.060（BSC） C 0.204 0.360 0.008 0.014 D 9.000 9.400 0.354 0.370 E 6.200 6.600 0.244 0.260 E1 7.320 7.920 0.288 0.312 e 2.540 (BSC) 0.100（BSC） L 3.000 3.600 0.118 0.142 E2 8.400 9.000 0.331 0.354 © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A-Page13 Fremont Micro Devices FT25C32A DS SOP8 PACKAGE OUTLINE DIMENSIONS Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A 1.350 1.750 0.053 0.069 A1 0.100 0.250 0.004 0.010 A2 1.350 1.550 0.053 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.006 0.010 D 4.700 5.100 0.185 0.200 E 3.800 4.000 0.150 0.157 E1 5.800 6.200 0.228 0.244 e 1.270 (BSC) 0.050 (BSC) L 0.400 1.270 0.016 0.050 θ 0° 8° 0° 8° © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A-Page14 Fremont Micro Devices FT25C32A DS TSSOP8 PACKAGE OUTLINE DIMENSIONS Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max D 2.900 3.100 0.114 0.122 E 4.300 4.500 0.169 0.177 b 0.190 0.300 0.007 0.012 c 0.090 0.200 0.004 0.008 E1 6.250 6.550 0.246 0.258 A 1.100 0.043 A2 0.800 1.000 0.031 0.039 A1 0.020 0.150 0.001 0.006 e L 0.65 (BSC) 0.500 H θ 0.026 (BSC) 0.700 0.020 0.25 (TYP) 1° © 2013 Fremont Micro Devices Inc. 0.028 0.01 (TYP) 7° 1° Confidential Rev 0.82 7° DS25C32A-Page15 Fremont Micro Devices FT25C32A DS Fremont Micro Devices (SZ) Limited #5-8, 10/F, Changhong Building, Ke-Ji Nan 12 Road, Nanshan District, Shenzhen, Guangdong 518057 Tel: (86 755) 86117811 Fax: (86 755) 86117810 Fremont Micro Devices (Hong Kong) Limited #16, 16/F, Blk B, Veristrong Industrial Centre, 34-36 Au Pui Wan Street, Fotan, Shatin, Hong Kong Tel: (852) 27811186 Fax: (852) 27811144 Web Site: http://www.fremontmicro.com/ * Information furnished is believed to be accurate and reliable. However, Fremont Micro Devices, Incorporated (BVI) assumes no responsibility for the consequences of use of such information or for any infringement of patents of other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent rights of Fremont Micro Devices, Incorporated (BVI). Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. Fremont Micro Devices, Incorporated (BVI) products are not authorized for use as critical components in life support devices or systems without express written approval of Fremont Micro Devices, Incorporated (BVI). The FMD logo is a registered trademark of Fremont Micro Devices, Incorporated (BVI). All other names are the property of their respective owners. © 2013 Fremont Micro Devices Inc. Confidential Rev 0.82 DS25C32A-Page16