A25L016 Series 16Mbit Low Voltage, Serial Flash Memory With 100MHz Uniform 4KB Sectors Document Title 16Mbit, Low Voltage, Serial Flash Memory With 100MHz Uniform 4KB Sectors Revision History Rev. No. 0.0 History Issue Date Remark Initial issue April 2, 2008 Final (April, 2008, Version 0.0) AMIC Technology Corp. A25L016 Series 16Mbit Low Voltage, Serial Flash Memory With 100MHz Uniform 4KB Sectors FEATURES 16Mbit Flash memory Family of Serial Flash Memories - A25L016: 16M-bit /2M-byte Flexible Sector Architecture with 4KB sectors - Sector Erase (4K-bytes) in 60ms (typical) - Block Erase (64K-bytes) in 0.5s (typical) Page Program (up to 256 Bytes) in 0.8ms (typical) 2.7 to 3.6V Single Supply Voltage Dual input / output instructions resulting in an equivalent clock frequency of 200MHz: - Dual Output Fast Read Instruction - Dual Input and Output Fast Read Instruction SPI Bus Compatible Serial Interface 100MHz Clock Rate (maximum) Deep Power-down Mode 5µA (Max) - Uniform 4-Kbyte sectors - Uniform 64-Kbyte blocks Electronic Signatures - JEDEC Standard Two-Byte Signature A25L016: (3015h) - RES Instruction, One-Byte, Signature, for backward compatibility A25L016 (14h) Package options - 8-pin SOP (209mil), 16-pin SOP (300mil), 8-pin DIP (300mil) - All Pb-free (Lead-free) products are RoHS compliant GENERAL DESCRIPTION The A25L016 is 16M bit Serial Flash Memory, with advanced write protection mechanisms, accessed by a high speed SPI-compatible bus. sectors. Each sector is composed of 16 pages. Each page is 256 bytes wide. Thus, the whole memory can be viewed as consisting of 8,192 pages, or 2,097,152 bytes. The whole memory can be erased using the Chip Erase instruction, a block at a time, using Block Erase instruction, or a sector at a time, using the Sector Erase instruction. The memory can be programmed 1 to 256 bytes at a time, using the Page Program instruction. The memory is organized as 32 blocks, each containing 16 Pin Configurations SOP8 Connections SOP16 Connections DIP8 Connections A25L016 A25L016 S DO W VSS 1 2 3 4 8 VCC 7 HOLD 6 C 5 DIO HOLD VCC DU DU DU DU S DO 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 C DIO DU DU DU DU VSS W A25L016 S DO W VSS 1 2 3 4 8 VCC 7 HOLD 6 C 5 DIO Note: DU = Do not Use (April, 2008, Version 0.0) 1 AMIC Technology Corp. A25L016 Series Block Diagram HOLD W High Voltage Generator Control Logic S C DIO I/O Shift Register DO Address register and Counter 256 Byte Data Buffer Status Register 1FFFFF Y Decoder Size of the memory area 000FFh 00000h 256 Byte (Page Size) X Decoder Pin Descriptions Pin No. Logic Symbol Description C Serial Clock DIO Serial Data Input 1 DO Serial Data Output 2 S Chip Select W Write Protect HOLD Hold VCC Supply Voltage VSS Ground VCC DIO DO C S A25L016 W HOLD VSS Notes: 1. The DIO is also used as an output pin when the Fast Read Dual Output instruction and the Fast Read Dual Input-Output instruction are executed. 2. The DO is also used as an input pin when the Fast Read Dual Input-Output instruction. (April, 2008, Version 0.0) 2 AMIC Technology Corp. A25L016 Series impedance. Unless an internal Program, Erase or Write Status Register cycle is in progress, the device will be in the Standby mode (this is not the Deep Power-down mode). Driving Chip Select ( S ) Low enables the device, placing it in the active power mode. After Power-up, a falling edge on Chip Select ( S ) is required prior to the start of any instruction. Hold ( HOLD ). The Hold ( HOLD ) signal is used to pause any serial communications with the device without deselecting the device. During the Hold condition, the Serial Data Output (DO) is high impedance, and Serial Data Input (DIO) and Serial Clock (C) are Don’t Care. To start the Hold condition, the device must be selected, with Chip Select ( S ) driven Low. SIGNAL DESCRIPTION Serial Data Output (DO). This output signal is used to transfer data serially out of the device. Data is shifted out on the falling edge of Serial Clock (C). The DO pin is also used as an input pin when the Fast Read Dual Input-Output instruction and Dual Input Fast Program is executed. Serial Data Input (DIO). This input signal is used to transfer data serially into the device. It receives instructions, addresses, and the data to be programmed. Values are latched on the rising edge of Serial Clock (C). The DIO pin is also used as an output pin when the Fast Read Dual Output instruction and the Fast Read Dual Input-Output instruction are executed. Serial Clock (C). This input signal provides the timing of the serial interface. Instructions, addresses, or data present at Serial Data Input (DIO) are latched on the rising edge of Serial Clock (C). Data on Serial Data Output (DO) changes after the falling edge of Serial Clock (C). Chip Select ( S ). When this input signal is High, the device is deselected and Serial Data Output (DO) is at high (April, 2008, Version 0.0) Write Protect ( W ). The main purpose of this input signal is to freeze the size of the area of memory that is protected against program or erase instructions (as specified by the values in the BP2, BP1, and BP0 bits of the Status Register). 3 AMIC Technology Corp. A25L016 Series SPI MODES falling edge of Serial Clock (C). The difference between the two modes, as shown in Figure 2, is the clock polarity when the bus master is in Stand-by mode and not transferring data: – C remains at 0 for (CPOL=0, CPHA=0) – C remains at 1 for (CPOL=1, CPHA=1) These devices can be driven by a microcontroller with its SPI peripheral running in either of the two following modes: – CPOL=0, CPHA=0 – CPOL=1, CPHA=1 For these two modes, input data is latched in on the rising edge of Serial Clock (C), and output data is available from the Figure 1. Bus Master and Memory Devices on the SPI Bus SPI Interface with (CPOL, CPHA) = (0, 0) or (1, 1) SDO SDI SCK C DO DIO C DO DIO C DO DIO Bus Master (ST6, ST7, ST9, ST10, Other) CS3 CS2 SPI Memory Device SPI Memory Device SPI Memory Device S S S CS1 W HOLD W HOLD W HOLD Note: The Write Protect ( W ) and Hold ( HOLD ) signals should be driven, High or Low as appropriate. Figure 2. SPI Modes Supported CPOL CPHA 0 0 C 1 1 C DIO MSB DO (April, 2008, Version 0.0) MSB 4 AMIC Technology Corp. A25L016 Series OPERATING FEATURES WIP bit. The Write In Progress (WIP) bit indicates whether the memory is busy with a Write Status Register, Program or Erase cycle. Page Programming To program one data byte, two instructions are required: Write Enable (WREN), which is one byte, and a Page Program (PP) sequence, which consists of four bytes plus data. This is followed by the internal Program cycle (of duration tPP). To spread this overhead, the Page Program (PP) instruction allows up to 256 bytes to be programmed at a time (changing bits from 1 to 0), provided that they lie in consecutive addresses on the same page of memory. WEL bit. The Write Enable Latch (WEL) bit indicates the status of the internal Write Enable Latch. BP2, BP1, BP0 bits. The Block Protect (BP2, BP1, BP0) bits are non-volatile. They define the size of the area to be software protected against Program and Erase instructions. Sector Erase, Block Erase, and Chip Erase SRWD bit. The Status Register Write Disable (SRWD) bit is operated in conjunction with the Write Protect ( W ) signal. The Status Register Write Disable (SRWD) bit and Write Protect ( W ) signal allow the device to be put in the Hardware Protected mode. In this mode, the non-volatile bits of the Status Register (SRWD, TB, BP2, BP1, BP0) become read-only bits. The Page Program (PP) instruction and Dual Input Fast Program (DIFP) instruction allow bits to be reset from 1 to 0. Before this can be applied, the bytes of memory need to have been erased to all 1s (FFh). This can be achieved, a sector at a time, using the Sector Erase (SE) instruction, a block at a time, using the Block Erase (BE) instruction, or throughout the entire memory, using the Chip Erase (CE) instruction. This starts an internal Erase cycle (of duration tSE, tBE, or tCE). The Erase instruction must be preceded by a Write Enable (WREN) instruction. Protection Modes The environments where non-volatile memory devices are used can be very noisy. No SPI device can operate correctly in the presence of excessive noise. To help combat this, the A25L016 boasts the following data protection mechanisms: Power-On Reset and an internal timer (tPUW) can provide protection against inadvertent changes while the power supply is outside the operating specification. Program, Erase and Write Status Register instructions are checked that they consist of a number of clock pulses that is a multiple of eight, before they are accepted for execution. All instructions that modify data must be preceded by a Write Enable (WREN) instruction to set the Write Enable Latch (WEL) bit. This bit is returned to its reset state by the following events: - Power-up - Write Disable (WRDI) instruction completion - Write Status Register (WRSR) instruction completion - Page Program (PP) instruction completion - Sector Erase (SE) instruction completion - Block Erase (BE) instruction completion - Chip Erase (CE) instruction completion The Block Protect (BP2, BP1, BP0) bits allow part of the memory to be configured as read-only. This is the Software Protected Mode (SPM). The Write Protect ( W ) signal allows the Block Protect (BP2, BP1, BP0) bits and Status Register Write Disable (SRWD) bit to be protected. This is the Hardware Protected Mode (HPM). In addition to the low power consumption feature, the Deep Power-down mode offers extra software protection from inadvertent Write, Program and Erase instructions, as all instructions are ignored except one particular instruction (the Release from Deep Power-down instruction). Polling During a Write, Program or Erase Cycle A further improvement in the time to Write Status Register (WRSR), Program (PP) or Erase (SE, BE, or CE) can be achieved by not waiting for the worst case delay (tW, tPP, tSE, tBE, tCE). The Write In Progress (WIP) bit is provided in the Status Register so that the application program can monitor its value, polling it to establish when the previous Write cycle, Program cycle or Erase cycle is complete. Active Power, Stand-by Power and Deep Power-Down Modes When Chip Select ( S ) is Low, the device is enabled, and in the Active Power mode. When Chip Select ( S ) is High, the device is disabled, but could remain in the Active Power mode until all internal cycles have completed (Program, Erase, Write Status Register). The device then goes in to the Stand-by Power mode. The device consumption drops to ICC1. The Deep Power-down mode is entered when the specific instruction (the Deep Power-down Mode (DP) instruction) is executed. The device consumption drops further to ICC2. The device remains in this mode until another specific instruction (the Release from Deep Power-down Mode and Read Electronic Signature (RES) instruction) is executed. All other instructions are ignored while the device is in the Deep Power-down mode. This can be used as an extra software protection mechanism, when the device is not in active use, to protect the device from inadvertent Write, Program or Erase instructions. Status Register The Status Register contains a number of status and control bits that can be read or set (as appropriate) by specific instructions. (April, 2008, Version 0.0) 5 AMIC Technology Corp. A25L016 Series Table 1. Protected Area Sizes Status Register Content Memory Protection BP2 BP1 BP0 Block(s) Addresses Density Portion 0 0 0 None None None None 0 0 1 31 1F0000h – 1FFFFFh 64KB Upper 1/32 0 1 0 30 – 31 1E0000h – 1FFFFFh 128KB Upper 1/16 0 1 1 28 – 31 1C0000h – 1FFFFFh 256KB Upper 1/8 1 0 0 24 – 31 180000h – 1FFFFFh 512KB Upper 1/4 1 0 1 16 – 31 100000h – 1FFFFFh 1MB Upper 1/2 1 1 X 0 – 31 000000h – 1FFFFFh 2MB All Note: 1. X = don’t care 2. The device is ready to accept a Chip Erase instruction if, and only if, all Block Protect (BP2, BP1, BP0) are 0. (April, 2008, Version 0.0) 6 AMIC Technology Corp. A25L016 Series Hold Condition Serial Clock (C) next goes Low. This is shown in Figure 3. During the Hold condition, the Serial Data Output (DO) is high impedance, and Serial Data Input (DIO) and Serial Clock (C) are Don’t Care. Normally, the device is kept selected, with Chip Select ( S ) driven Low, for the whole duration of the Hold condition. This is to ensure that the state of the internal logic remains unchanged from the moment of entering the Hold condition. If Chip Select ( S ) goes High while the device is in the Hold condition, this has the effect of resetting the internal logic of the device. To restart communication with the device, it is necessary to drive Hold ( HOLD ) High, and then to drive The Hold ( HOLD ) signal is used to pause any serial communications with the device without resetting the clocking sequence. However, taking this signal Low does not terminate any Write Status Register, Program or Erase cycle that is currently in progress. To enter the Hold condition, the device must be selected, with Chip Select ( S ) Low. The Hold condition starts on the falling edge of the Hold ( HOLD ) signal, provided that this coincides with Serial Clock (C) being Low (as shown in Figure 3.). The Hold condition ends on the rising edge of the Hold ( HOLD ) signal, provided that this coincides with Serial Clock (C) being Low. If the falling edge does not coincide with Serial Clock (C) being Low, the Hold condition starts after Serial Clock (C) next goes Low. Similarly, if the rising edge does not coincide with Serial Clock (C) being Low, the Hold condition ends after Chip Select ( S ) Low. This prevents the device from going back to the Hold condition. Figure 3. Hold Condition Activation C HOLD Hold Condition (standard use) (April, 2008, Version 0.0) 7 Hold Condition (non-standard use) AMIC Technology Corp. A25L016 Series MEMORY ORGANIZATION Each page can be individually programmed (bits are programmed from 1 to 0). The device is Sector, Block, or Chip Erasable (bits are erased from 0 to 1) but not Page Erasable. The memory is organized as: 2,097,152 bytes (8 bits each) 32 blocks (64 Kbytes each) 512 sectors (4 Kbytes each) 8192 pages (256 bytes each) Table 2. Memory Organization A25L016 Address Table Block Sector 511 1EF000h 1EFFFFh ... ... ... ... 288 120000h 120FFFh 1CFFFFh 287 11F000h 11FFFFh 447 1BF000h 1BFFFFh 431 1AF000h 1AFFFFh 415 19F000h 19FFFFh 100FFFh 255 FF000h FFFFFh 240 F0000h F0FFFh 239 EF000h EFFFFh ... 190FFFh 100000h ... ... 190000h 256 ... ... 400 14 10FFFFh ... 1A0FFFh 10F000h ... ... 1A0000h 271 ... ... 416 15 110FFFh ... 1B0FFFh 110000h ... ... 1B0000h 272 ... ... 432 16 ... 1C0FFFh ... ... 1C0000h 17 ... ... 448 224 E0000h E0FFFh 18FFFFh 223 DF000h DFFFFh 383 17F000h 17FFFFh 367 16F000h 16FFFFh 351 15F000h 15FFFFh 8 C0FFFh 191 BF000h BFFFFh 176 B0000h B0FFFh 175 AF000h AFFFFh ... ... 150FFFh C0000h ... ... 150000h 192 ... ... 336 10 CFFFFh ... ... 160FFFh CF000h ... ... 160000h 207 ... ... 352 11 D0FFFh ... 170FFFh D0000h ... ... 170000h 208 ... ... 368 12 ... 180FFFh ... ... 180000h 13 ... ... 384 (April, 2008, Version 0.0) 18 ... ... 1D0FFFh ... 21 ... ... 1D0000h ... 22 ... ... 464 ... 23 12FFFFh 1DFFFFh 18F000h 13FFFFh 12F000h 1DF000h 399 24 13F000h 303 479 ... 25 319 130FFFh ... 26 140FFFh 130000h ... 27 140000h 304 1E0000h 1CF000h 320 1E0FFFh 480 463 28 19 14FFFFh ... 495 14F000h ... ... 1F0FFFh 20 Address range ... ... 1F0000h ... 29 496 Sector 335 1FFFFFh ... 30 1FF000h ... 31 Block Address range 160 A0000h A0FFFh AMIC Technology Corp. A25L016 Series Memory Organization (continued) Block Sector 159 8F000h 8FFFFh 127 7F000h 7FFFFh 111 31 1F000h 1FFFFh 10000h 10FFFh 6FFFFh 0FFFFh ... ... ... ... 4 04000h 04FFFh 3 03000h 03FFFh 2 02000h 02FFFh 1 01000h 01FFFh 0 00000h 00FFFh ... 60FFFh 96 60000h 95 5F000h 5FFFFh ... ... 80 50000h 50FFFh 79 4F000h 4FFFFh ... ... 64 40000h 40FFFh (April, 2008, Version 0.0) 20FFFh 0F000h ... 4 20000h 15 ... 5 6F000h 32 16 ... 6 2FFFFh ... 70FFFh 2F000h ... ... 70000h 47 ... ... 112 1 30FFFh ... 80FFFh 30000h ... ... 80000h 48 ... ... 128 2 3FFFFh ... 143 3F000h ... ... 90FFFh 3 Address range ... ... 90000h ... 7 144 Sector 63 9FFFFh ... 8 9F000h ... 9 Block Address range 0 9 AMIC Technology Corp. A25L016 Series INSTRUCTIONS All instructions, addresses and data are shifted in and out of the device, most significant bit first. Serial Data Input (DIO) is sampled on the first rising edge of Serial Clock (C) after Chip Select ( S ) is driven Low. Then, the one-byte instruction code must be shifted in to the device, most significant bit first, on Serial Data Input (DIO), each bit being latched on the rising edges of Serial Clock (C). The instruction set is listed in Table 3. Every instruction sequence starts with a one-byte instruction code. Depending on the instruction, this might be followed by address bytes, or by data bytes, or by both or none. In the case of a Read Data Bytes (READ), Read Data Bytes at Higher Speed (Fast_Read), Read Identification (RDID), Read Electronic Manufacturer and Device Identification (REMS), Read Status Register (RDSR) or Release from Deep Power-down, Read Device Identification and Read Electronic Signature (RES) instruction, the shifted-in instruction sequence is followed by a data-out sequence. Chip Select ( S ) can be driven High after any bit of the data-out sequence is being shifted out. In the case of a Page Program (PP), Sector Erase (SE), Block Erase (BE), Chip Erase (CE), Write Status Register (WRSR), Write Enable (WREN), Write Disable (WRDI) or Deep Power-down (DP) instruction, Chip Select ( S ) must be driven High exactly at a byte boundary, otherwise the instruction is rejected, and is not executed. That is, Chip Select ( S ) must driven High when the number of clock pulses after Chip Select ( S ) being driven Low is an exact multiple of eight. All attempts to access the memory array during a Write Status Register cycle, Program cycle or Erase cycle are ignored, and the internal Write Status Register cycle, Program cycle or Erase cycle continues unaffected. Table 3. Instruction Set Instruction One-byte Instruction Code Description Address Bytes Dummy Bytes Data Bytes WREN Write Enable 0000 0110 06h 0 0 0 WRDI Write Disable 0000 0100 04h 0 0 0 RDSR Read Status Register 0000 0101 05h 0 0 1 to ∞ WRSR Write Status Register 0000 0001 01h 0 0 1 READ Read Data Bytes 0000 0011 03h 3 0 1 to ∞ FAST_READ Read Data Bytes at Higher Speed 0000 1011 0Bh 3 1 1 to ∞ FAST_READ_DUAL _OUTPUT Read Data Bytes at Higher Speed by Dual Output (1) 00111011 3Bh 3 1 1 to ∞ FAST_READ_DUAL _INPUT-OUTPUT Read Data Bytes at Higher Speed by Dual Input and Dual Output (1) 10111011 BBh 3(2) 1(2) 1 to ∞ PP Page Program 0000 0010 02h 3 0 1 to 256 SE Sector Erase 0010 0000 20h 3 0 0 BE Block Erase 1101 1000 D8h 3 0 0 CE Chip Erase 1100 0111 C7h 0 0 0 DP Deep Power-down 1011 1001 B9h 0 0 0 RDID Read Device Identification 1001 1111 9Fh 0 0 1 to ∞ REMS Read Electronic Manufacturer & Device Identification 1001 0000 90h (3) 2 1 to ∞ 1010 1011 ABh 0 3 1 to ∞ 0 0 0 RES Release from Deep Power-down, and Read Electronic Signature 1 Release from Deep Power-down Note: (1) DIO = (D6, D4, D2, D0) DO = (D7, D5, D3, D1) (2) Dual Input, DIO = (A22, A20, A18, ………, A6, A4, A2, A0) DO = (A23, A21, A19, …….., A7, A5, A3, A1) (3) ADD= (00h) will output manufacturer’s ID first and ADD=(01h) will output device ID first (April, 2008, Version 0.0) 10 AMIC Technology Corp. A25L016 Series Write Enable (WREN) instruction. The Write Enable (WREN) instruction is entered by driving Chip Select ( S ) Low, sending the instruction code, and then The Write Enable (WREN) instruction (Figure 4.) sets the Write Enable Latch (WEL) bit. The Write Enable Latch (WEL) bit must be set prior to every Page Program (PP), Sector Erase (SE), Block Erase (BE), Chip Erase (CE) and Write Status Register (WRSR) driving Chip Select ( S ) High. Figure 4. Write Enable (WREN) Instruction Sequence S 0 1 2 3 4 5 6 7 C Instruction DIO DO High Impedance Write Disable (WRDI) ﹣ Power-up The Write Disable (WRDI) instruction (Figure 5.) resets the ﹣ ﹣ ﹣ ﹣ ﹣ ﹣ Write Enable Latch (WEL) bit. The Write Disable (WRDI) instruction is entered by driving Chip Select ( S ) Low, sending the instruction code, and then driving Chip The Write Enable Latch (WEL) bit is reset under the following conditions: Write Disable (WRDI) instruction completion Write Status Register (WRSR) instruction completion Page Program (PP) instruction completion Sector Erase (SE) instruction completion Block Erase (BE) instruction completion Chip Erase (CE) instruction completion Figure 5. Write Disable (WRDI) Instruction Sequence S 0 1 2 3 4 5 6 7 C Instruction DIO DO (April, 2008, Version 0.0) High Impedance 11 AMIC Technology Corp. A25L016 Series Read Status Register (RDSR) The Read Status Register (RDSR) instruction allows the Status Register to be read. The Status Register may be read at any time, even while a Program, Erase or Write Status Register cycle is in progress. When one of these cycles is in progress, it is recommended to check the Write In Progress (WIP) bit before sending a new instruction to the device. It is also possible to read the Status Register continuously, as shown in Figure 6. Table 4. Status Register Format b6 0 b7 SRWD b5 0 b4 BP2 b3 BP1 b2 BP0 b1 WEL b0 WIP Status Register Write Protect Block Protect Bits Write Enable Latch Bit Write In Progress Bit The status and control bits of the Status Register are as follows: WIP bit. The Write In Progress (WIP) bit indicates whether the memory is busy with a Write Status Register, Program or Erase cycle. When set to 1, such a cycle is in progress, when reset to 0 no such cycle is in progress. WEL bit. The Write Enable Latch (WEL) bit indicates the status of the internal Write Enable Latch. When set to 1 the internal Write Enable Latch is set, when set to 0 the internal Write Enable Latch is reset and no Write Status Register, Program or Erase instruction is accepted. BP2, BP1, BP0 bits. The Block Protect (BP2, BP1, BP0) bits are non-volatile. They define the size of the area to be software protected against Program and Erase instructions. These bits are written with the Write Status Register (WRSR) instruction. When one or more of the Block Protect (BP2, BP1, BP0) bits is set to 1, the relevant memory area (as defined in Table 1.) becomes protected against Page Program (PP), Sector Erase (SE), and Block Erase (BE) instructions. The Block Protect (BP2, BP1, BP0) bits can be written provided that the Hardware Protected mode has not been set. The Chip Erase (CE) instruction is executed if, and only if, all Block Protect (BP2, BP1, BP0) bits are 0. SRWD bit. The Status Register Write Disable (SRWD) bit is operated in conjunction with the Write Protect ( W ) signal. The Status Register Write Disable (SRWD) bit and Write Protect ( W ) signal allow the device to be put in the Hardware Protected mode (when the Status Register Write Disable (SRWD) bit is set to 1, and Write Protect ( W ) is driven Low). In this mode, the non-volatile bits of the Status Register (SRWD, TB, BP2, BP1, BP0) become read-only bits and the Write Status Register (WRSR) instruction is no longer accepted for execution. Figure 6. Read Status Register (RDSR) Instruction Sequence and Data-Out Sequence S 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 C Instruction DIO Status Register Out DO High Impedance (April, 2008, Version 0.0) 7 6 5 MSB 4 3 2 1 12 Status Register Out 0 7 6 MSB 5 4 3 2 1 0 7 AMIC Technology Corp. A25L016 Series Write Status Register (WRSR) The Write Status Register (WRSR) instruction allows new values to be written to the Status Register. Before it can be accepted, a Write Enable (WREN) instruction must previously have been executed. After the Write Enable (WREN) instruction has been decoded and executed, the device sets the Write Enable Latch (WEL). The Write Status Register (WRSR) instruction is entered by Write Status Register cycle is in progress, the Status Register may still be read to check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the self-timed Write Status Register cycle, and is 0 when it is completed. When the cycle is completed, the Write Enable Latch (WEL) is reset. The Write Status Register (WRSR) instruction allows the user to change the values of the Block Protect (BP2, BP1, BP0) bits, to define the size of the area that is to be treated as read-only, as defined in Table 1. The Write Status Register (WRSR) instruction also allows the user to set or reset the Status Register Write Disable (SRWD) bit in accordance with the Write Protect ( W ) signal. The Status Register Write Disable (SRWD) bit and Write Protect ( W ) signal allow the device to be put in the Hardware Protected Mode (HPM). The Write Status Register (WRSR) instruction is not executed once the Hardware Protected Mode (HPM) is entered. driving Chip Select ( S ) Low, followed by the instruction code and the data byte on Serial Data Input (DIO). The instruction sequence is shown in Figure 7. The Write Status Register (WRSR) instruction has no effect on b6, b5, b1 and b0 of the Status Register. b6 and b5 are always read as 0. Chip Select ( S ) must be driven High after the eighth bit of the data byte has been latched in. If not, the Write Status Register (WRSR) instruction is not executed. As soon as Chip Select ( S ) is driven High, the self-timed Write Status Register cycle (whose duration is tW) is initiated. While the Figure 7. Write Status Register (WRSR) Instruction Sequence S 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 C Status Register In Instruction 7 DIO DO (April, 2008, Version 0.0) 6 5 4 3 2 1 0 MSB High Impedance 13 AMIC Technology Corp. A25L016 Series Table 5. Protection Modes Signal SRWD Bit 1 0 W 0 0 1 1 0 1 Mode Memory Content Write Protection of the Status Register Protected Area1 Unprotected Area1 Software Protected (SPM) Status Register is Writable (if the WREN instruction has set the WEL bit) The values in the SRWD, TB, BP2, BP1, and BP0 bits can be changed Protected against Page Program, Dual Input Fast Program, Sector Erase, Block Erase, and Chip Erase Ready to accept Page Program, Dual Input Fast Program, Sector Erase, and Block Erase instructions Hardware Protected (HPM) Status Register is Hardware write protected The values in the SRWD, TB, BP2, BP1, and BP0 bits cannot be changed Protected against Page Program, Dual Input Fast Program, Sector Erase, Block Erase, and Chip Erase Ready to accept Page Program, Dual Input Fast Program, Sector Erase, and Block Erase instructions Note: 1. As defined by the values in the Block Protect (TB, BP2, BP1, BP0) bits of the Status Register, as shown in Table 1. The protection features of the device are summarized in Table 5. When the Status Register Write Disable (SRWD) bit of the Status Register is 0 (its initial delivery state), it is possible to write to the Status Register provided that the Write Enable Latch (WEL) bit has previously been set by a Write Enable (WREN) instruction, regardless of the whether Write Protect ( W ) is driven High or Low. When the Status Register Write Disable (SRWD) bit of the Status Register is set to 1, two cases need to be considered, depending on the state of Write Protect ( W ): If Write Protect ( W ) is driven High, it is possible to write to the Status Register provided that the Write Enable Latch (WEL) bit has previously been set by a Write Enable (WREN) instruction. If Write Protect (W) is driven Low, it is not possible to write to the Status Register even if the Write Enable Latch (WEL) bit has previously been set by a Write Enable (WREN) instruction. (Attempts to write to the Status (April, 2008, Version 0.0) Register are rejected, and are not accepted for execution). As a consequence, all the data bytes in the memory area that are software protected (SPM) by the Block Protect (BP2, BP1, BP0) bits of the Status Register, are also hardware protected against data modification. Regardless of the order of the two events, the Hardware Protected Mode (HPM) can be entered: by setting the Status Register Write Disable (SRWD) bit after driving Write Protect ( W ) Low or by driving Write Protect ( W ) Low after setting the Status Register Write Disable (SRWD) bit. The only way to exit the Hardware Protected Mode (HPM) once entered is to pull Write Protect ( W ) High. If Write Protect ( W ) is permanently tied High, the Hardware Protected Mode (HPM) can never be activated, and only the Software Protected Mode (SPM), using the Block Protect (BP2, BP1, BP0) bits of the Status Register, can be used. 14 AMIC Technology Corp. A25L016 Series Read Data Bytes (READ) The device is first selected by driving Chip Select ( S ) Low. The instruction code for the Read Data Bytes (READ) instruction is followed by a 3-byte address (A23-A0), each bit being latched-in during the rising edge of Serial Clock (C). Then the memory contents, at that address, is shifted out on Serial Data Output (DO), each bit being shifted out, at a maximum frequency fR, during the falling edge of Serial Clock (C). The instruction sequence is shown in Figure 8. The first byte addressed can be at any location. The address is automatically incremented to the next higher address after each byte of data is shifted out. The whole memory can, therefore, be read with a single Read Data Bytes (READ) instruction. When the highest address is reached, the address counter rolls over to 000000h, allowing the read sequence to be continued indefinitely. The Read Data Bytes (READ) instruction is terminated by driving Chip Select ( S ) High. Chip Select ( S ) can be driven High at any time during data output. Any Read Data Bytes (READ) instruction, while an Erase, Program or Write cycle is in progress, is rejected without having any effects on the cycle that is in progress. Figure 8. Read Data Bytes (READ) Instruction Sequence and Data-Out Sequence S 0 1 2 3 4 5 6 7 8 9 10 28 29 30 31 32 33 34 35 36 37 38 39 C Instruction 24-Bit Address 23 22 21 DIO 3 2 1 0 MSB DO Data Out 2 Data Out 1 High Impedance 7 6 5 4 3 2 1 0 7 MSB Note:. Address bits A23 to A21 are Don’t Care, for A25L016. (April, 2008, Version 0.0) 15 AMIC Technology Corp. A25L016 Series Read Data Bytes at Higher Speed (FAST_READ) Speed (FAST_READ) instruction. When the highest address is reached, the address counter rolls over to 000000h, allowing the read sequence to be continued indefinitely. The Read Data Bytes at Higher Speed (FAST_READ) The device is first selected by driving Chip Select ( S ) Low. The instruction code for the Read Data Bytes at Higher Speed (FAST_READ) instruction is followed by a 3-byte address (A23-A0) and a dummy byte, each bit being latched-in during the rising edge of Serial Clock (C). Then the memory contents, at that address, is shifted out on Serial Data Output (DO), each bit being shifted out, at a maximum frequency fC, during the falling edge of Serial Clock (C). The instruction sequence is shown in Figure 9. The first byte addressed can be at any location. The address is automatically incremented to the next higher address after each byte of data is shifted out. The whole memory can, therefore, be read with a single Read Data Bytes at Higher instruction is terminated by driving Chip Select ( S ) High. Chip Select ( S ) can be driven High at any time during data output. Any Read Data Bytes at Higher Speed (FAST_READ) instruction, while an Erase, Program or Write cycle is in progress, is rejected without having any effects on the cycle that is in progress. Figure 9. Read Data Bytes at Higher Speed (FAST_READ) Instruction Sequence and Data-Out Sequence S 0 1 2 3 4 5 6 7 8 9 10 28 29 30 31 C Instruction 24-Bit Address 23 22 21 DIO 2 3 1 0 MSB High Impedance DO S 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 C Dummy Byte DIO 7 6 5 4 3 2 1 0 Data Out 2 Data Out 1 DO 7 6 5 4 MSB 3 2 1 0 7 6 5 MSB 4 3 2 1 0 7 MSB Note:. Address bits A23 to A21 are Don’t Care, for A25L016. (April, 2008, Version 0.0) 16 AMIC Technology Corp. A25L016 Series Fast Read Dual Output (3Bh) The Fast Read Dual Output (3Bh) instruction is similar to the Fast Read (0Bh) instruction except the data is output on two pins, DO and DIO, instead of just DO. This allows data to be transferred from the A25L016 at twice the rate of standard SPI devices. Similar to the Fast Read instruction, the Fast Read Dual Output instruction can operate at the highest possible frequency of fC (See AC Characteristics). This is accomplished by adding eight “dummy” clocks after the 24-bit address as shown in figure 10. The dummy clocks allow the device’s internal circuits additional time for setting up the initial address. The input data during the dummy clocks is “don’t care”. However, the DIO pin should be high-impedance prior to the falling edge of the first data out clock. Figure 10. FAST_READ_DUAL_OUTPUT Instruction Sequence and Data-Out Sequence S 0 1 2 3 4 5 6 7 8 9 10 28 29 30 31 C Instruction 24-Bit Address 23 22 21 DIO 2 3 1 0 MSB High Impedance DO S 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 C DIO switches from input to output Dummy Byte DIO 7 6 DO 5 4 3 2 1 0 6 4 2 0 6 4 2 0 7 5 3 1 7 5 3 1 MSB 6 4 2 0 6 4 2 0 7 5 3 1 7 5 3 1 Data Out 1 Data Out 2 Data Out 3 7 MSB MSB Data Out 4 Note:. Address bits A23 to A21 are Don’t Care, for A25L016. (April, 2008, Version 0.0) 17 AMIC Technology Corp. A25L016 Series Fast Read Dual Input-Output (BBh) The Fast Read Dual Input-Output (BBh) instruction is similar to the Fast_Read (0Bh) instruction except the data is input and output on two pins, DO and DIO, instead of just DO. This allows data to be transferred from the A25L016 at twice the rate of standard SPI devices. Similar to the Fast Read instruction, the Fast Read Dual Output instruction can operate at the highest possible frequency of fC (See AC Characteristics). This is accomplished by adding four “dummy” clocks after the 24-bit address as shown in figure 11. The dummy clocks allow the device’s internal circuits additional time for setting up the initial address. The input data during the dummy clocks is “don’t care”. However, the DIO and DO pins should be high-impedance prior to the falling edge of the first data out clock. Figure 11. FAST_READ_DUAL_INPUT-OUTPUT Instruction Sequence and Data-Out Sequence S 0 1 2 3 4 5 6 7 8 9 10 16 17 18 19 C Instruction 24-Bit Address 22 20 18 DIO 6 4 2 0 7 5 3 1 MSB High Impedance DO 23 21 19 S 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 C Dummy Byte DIO 3 DO 2 1 DIO switches from input to output 0 6 4 2 7 5 3 MSB Data Out 1 0 6 1 4 2 0 6 4 2 0 6 4 2 0 6 4 2 0 7 5 3 1 7 5 3 1 7 5 3 1 7 5 3 1 MSB MSB Data Out 2 Data Out 3 Data Out 4 7 MSB Data Out 5 Note:. Address bits A23 to A21 are Don’t Care, for A25L016. (April, 2008, Version 0.0) 18 AMIC Technology Corp. A25L016 Series Page Program (PP) The Page Program (PP) instruction allows bytes to be programmed in the memory (changing bits from 1 to 0). Before it can be accepted, a Write Enable (WREN) instruction must previously have been executed. After the Write Enable (WREN) instruction has been decoded, the device sets the Write Enable Latch (WEL). programmed correctly within the same page. If less than 256 Data bytes are sent to device, they are correctly programmed at the requested addresses without having any effects on the other bytes of the same page. Chip Select ( S ) must be driven High after the eighth bit of the last data byte has been latched in, otherwise the Page Program (PP) instruction is not executed. The Page Program (PP) instruction is entered by driving Chip Select ( S ) Low, followed by the instruction code, three address bytes and at least one data byte on Serial Data Input (DIO). If the 8 least significant address bits (A7-A0) are not all zero, all transmitted data that goes beyond the end of the current page are programmed from the start address of the same page (from the address whose 8 least significant bits As soon as Chip Select ( S ) is driven High, the self-timed Page Program cycle (whose duration is tPP) is initiated. While the Page Program cycle is in progress, the Status Register may be read to check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the self-timed Page Program cycle, and is 0 when it is completed. At some unspecified time before the cycle is completed, the Write Enable Latch (WEL) bit is reset. (A7-A0) are all zero). Chip Select ( S ) must be driven Low for the entire duration of the sequence. The instruction sequence is shown in Figure 12. If more than 256 bytes are sent to the device, previously latched data are discarded and the last 256 data bytes are guaranteed to be A Page Program (PP) instruction applied to a page which is protected by the Block Protect (BP2, BP1, BP0) bits (see table 1 and table 2) is not executed. Figure 12. Page Program (PP) Instruction Sequence S 0 1 2 3 4 5 6 7 8 9 10 28 29 30 31 32 33 34 35 36 37 38 39 C Instruction Data Byte 1 24-Bit Address 23 22 21 3 2 1 MSB 0 5 7 6 4 3 0 1 2 2078 2079 2077 2076 2075 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 2074 S 2073 MSB 2072 DIO 1 0 C Data Byte 2 DIO 7 6 MSB 5 4 3 2 Data Byte 3 1 0 7 6 MSB 5 4 3 2 Data Byte 256 1 0 7 6 5 4 3 2 MSB Note:. Address bits A23 to A21 are Don’t Care, for A25L016. (April, 2008, Version 0.0) 19 AMIC Technology Corp. A25L016 Series Sector Erase (SE) The Sector Erase (SE) instruction sets to 1 (FFh) all bits inside the chosen sector. Before it can be accepted, a Write Enable (WREN) instruction must previously have been executed. After the Write Enable (WREN) instruction has been decoded, the device sets the Write Enable Latch (WEL). The Sector Erase (SE) instruction is entered by driving Chip instruction is not executed. As soon as Chip Select ( S ) is driven High, the self-timed Sector Erase cycle (whose duration is tSE) is initiated. While the Sector Erase cycle is in progress, the Status Register may be read to check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the self-timed Sector Erase cycle, and is 0 when it is completed. At some unspecified time before the cycle is completed, the Write Enable Latch (WEL) bit is reset. A Sector Erase (SE) instruction applied to a page which is protected by the Block Protect (TB, BP2, BP1, BP0) bits (see table 1 and table 2) is not executed. Select ( S ) Low, followed by the instruction code on Serial Data Input (DIO). Chip Select ( S ) must be driven Low for the entire duration of the sequence. The instruction sequence is shown in Figure 13. Chip Select ( S ) must be driven High after the eighth bit of the instruction code has been latched in, otherwise the Sector Erase Figure 13. Sector Erase (SE) Instruction Sequence S 0 1 2 3 4 5 6 7 8 9 10 28 29 30 31 C Instruction DIO 24-Bit Address 23 22 21 3 2 1 0 MSB Note:. Address bits A23 to A21 are Don’t Care, for A25L016. (April, 2008, Version 0.0) 20 AMIC Technology Corp. A25L016 Series Block Erase (BE) The Block Erase (BE) instruction sets to 1 (FFh) all bits inside the chosen block. Before it can be accepted, a Write Enable (WREN) instruction must previously have been executed. After the Write Enable (WREN) instruction has been decoded, the device sets the Write Enable Latch (WEL). The Block Erase (BE) instruction is entered by driving Chip instruction is not executed. As soon as Chip Select ( S ) is driven High, the self-timed Block Erase cycle (whose duration is tBE) is initiated. While the Block Erase cycle is in progress, the Status Register may be read to check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the self-timed Block Erase cycle, and is 0 when it is completed. At some unspecified time before the cycle is completed, the Write Enable Latch (WEL) bit is reset. A Block Erase (BE) instruction applied to a page which is protected by the Block Protect (TB, BP2, BP1, BP0) bits (see table 1and table 2) is not executed. Select ( S ) Low, followed by the instruction code on Serial Data Input (DIO). Chip Select ( S ) must be driven Low for the entire duration of the sequence. The instruction sequence is shown in Figure 14. Chip Select ( S ) must be driven High after the eighth bit of the instruction code has been latched in, otherwise the Block Erase Figure 14. Block Erase (BE) Instruction Sequence S 0 1 2 3 4 5 6 7 8 9 10 28 29 30 31 C Instruction DIO 24-Bit Address 23 22 21 3 2 1 0 MSB Note:. Address bits A23 to A21 are Don’t Care, for A25L016. (April, 2008, Version 0.0) 21 AMIC Technology Corp. A25L016 Series Chip Erase (CE) The Chip Erase (CE) instruction sets all bits to 1 (FFh). Before it can be accepted, a Write Enable (WREN) instruction must previously have been executed. After the Write Enable (WREN) instruction has been decoded, the device sets the Write Enable Latch (WEL). The Chip Erase (CE) instruction is entered by driving Chip instruction is not executed. As soon as Chip Select ( S ) is driven High, the self-timed Chip Erase cycle (whose duration is tCE) is initiated. While the Chip Erase cycle is in progress, the Status Register may be read to check the value of the Write In Progress (WIP) bit. The Write In Progress (WIP) bit is 1 during the self-timed Chip Erase cycle, and is 0 when it is completed. At some unspecified time before the cycle is completed, the Write Enable Latch (WEL) bit is reset. The Chip Erase (CE) instruction is executed only if all Block Protect (TB, BP2, BP1, BP0) bits are 0. The Chip Erase (CE) instruction is ignored if one, or more, blocks are protected. Select ( S ) Low, followed by the instruction code on Serial Data Input (DIO). Chip Select ( S ) must be driven Low for the entire duration of the sequence. The instruction sequence is shown in Figure 15. Chip Select ( S ) must be driven High after the eighth bit of the instruction code has been latched in, otherwise the Block Erase Figure 15. Chip Erase (CE) Instruction Sequence S 0 1 2 3 4 5 6 7 C Instruction DIO Note:. Address bits A23 to A21 are Don’t Care, for A25L016. (April, 2008, Version 0.0) 22 AMIC Technology Corp. A25L016 Series Deep Power-down (DP) The Deep Power-down mode automatically stops at Power-down, and the device always Powers-up in the Standby mode. The Deep Power-down (DP) instruction is entered by driving Executing the Deep Power-down (DP) instruction is the only way to put the device in the lowest consumption mode (the Deep Power-down mode). It can also be used as an extra software protection mechanism, while the device is not in active use, since in this mode, the device ignores all Write, Program and Erase instructions. Chip Select ( S ) Low, followed by the instruction code on Serial Data Input (DIO). Chip Select ( S ) must be driven Low for the entire duration of the sequence. The instruction sequence is shown in Figure 16. Driving Chip Select ( S ) High deselects the device, and puts the device in the Standby mode (if there is no internal cycle currently in progress). But this mode is not the Deep Power-down mode. The Deep Power-down mode can only be entered by executing the Deep Power-down (DP) instruction, to reduce the standby current (from ICC1 to ICC2, as specified in DC Characteristics Table.). Chip Select ( S ) must be driven High after the eighth bit of the instruction code has been latched in, otherwise the Deep Power-down (DP) instruction is not executed. As soon as Chip Select ( S ) is driven High, it requires a delay of tDP before the supply current is reduced to ICC2 and the Deep Power-down mode is entered. Any Deep Power-down (DP) instruction, while an Erase, Program or Write cycle is in progress, is rejected without having any effects on the cycle that is in progress. Once the device has entered the Deep Power-down mode, all instructions are ignored except the Release from Deep Power-down and Read Electronic Signature (RES) instruction. This releases the device from this mode. The Release from Deep Power-down and Read Electronic Signature (RES) instruction also allows the Electronic Signature of the device to be output on Serial Data Output (DO). Figure 16. Deep Power-down (DP) Instruction Sequence S 0 1 2 3 4 5 6 tDP 7 C Instruction DIO Stand-by Mode (April, 2008, Version 0.0) 23 Deep Power-down Mode AMIC Technology Corp. A25L016 Series Read Device Identification (RDID) This is followed by the 24-bit device identification, stored in the memory, being shifted out on Serial Data Output (DO), each bit being shifted out during the falling edge of Serial Clock (C). The Read Identification (RDID) instruction allows the 8-bit manufacturer identification code to be read, followed by two bytes of device identification. The manufacturer identification is assigned by JEDEC, and has the value 37h. The device identification is assigned by the device manufacturer, and indicates the memory in the first bytes (30h), and the memory capacity of the device in the second byte (16h for A25L032, 15h for A25L016). Any Read Identification (RDID) instruction while an Erase, or Program cycle is in progress, is not decoded, and has no effect on the cycle that is in progress. The instruction sequence is shown in Figure 17. The Read Identification (RDID) instruction is terminated by driving Chip Select ( S ) High at any time during data output. When Chip Select ( S ) is driven High, the device is put in the Stand-by Power mode. Once in the Stand-by Power mode, the device waits to be selected, so that it can receive, decode and execute instructions. The device is first selected by driving Chip Select ( S ) Low. Then, the 8-bit instruction code for the instruction is shifted in. Table 6. Read Identification (READ_ID) Data-Out Sequence Manufacture Identification Device Identification Manufacture ID Memory Type Memory Capacity 37h 30h 15h Figure 17. Read Identification (RDID) Instruction Sequence and Data-Out Sequence S 0 1 2 3 4 5 6 7 8 9 10 13 14 15 16 17 18 21 22 23 24 25 26 29 30 31 C Instruction DIO DO 23 High Impedance (April, 2008, Version 0.0) 22 21 18 17 16 15 Manufacture ID 14 13 10 9 Memory Type 24 8 7 6 5 2 1 0 Memory Capacity AMIC Technology Corp. A25L016 Series Read Electronic Manufacturer ID & Device ID (REMS) If the one-byte address is set to 01h, then the device ID be read first and then followed by the Manufacturer ID. the other hand, if the one-byte address is set to 00h, then Manufacturer ID will be read first and then followed by device ID. The Read Electronic Manufacturer ID & Device ID (REMS) instruction allows the 8-bit manufacturer identification code to be read, followed by one byte of device identification. The manufacturer identification is assigned by JEDEC, and has the value 37h for AMIC. The device identification is assigned by the device manufacturer, and has the value 15h for A25L032, 14h for A25L016. Any Read Electronic Manufacturer ID & Device ID (REMS) instruction while an Erase, or Program cycle is in progress, is not decoded, and has no effect on the cycle that is in progress. will On the the The instruction sequence is shown in Figure 18. The Read Electronic Manufacturer ID & Device ID (REMS) instruction is terminated by driving Chip Select ( S ) High at any time during data output. When Chip Select ( S ) is driven High, the device is put in the Stand-by Power mode. Once in the Stand-by Power mode, the device waits to be selected, so that it can receive, decode and execute instructions. The device is first selected by driving Chip Select ( S ) Low. The 8-bit instruction code is followd by 2 dummy bytes and one byte address(A7~A0), each bit being latched-in on Serial Data Input (DIO) during the rising edge of Serial Clock (C). Table 7. Read Electronic Manufacturer ID & Device ID (REMS) Data-Out Sequence Manufacture Identification Device Identification 37h 14h Figure 18. Read Electronic Manufacturer ID & Device ID (REMS) Instruction Sequence and Data-Out Sequence S 0 1 2 3 4 5 6 7 8 9 10 20 21 22 23 C Instruction 2 Dummy Bytes 15 14 13 DIO 3 2 1 0 MSB DO High Impedance S 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 C ADD(1) DIO 7 6 5 4 3 2 1 0 Manufacturer ID DO Device ID 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0 MSB MSB MSB Notes: (1) ADD=00h will output the manufacturer ID first and ADD=01h will output device ID first (April, 2008, Version 0.0) 25 AMIC Technology Corp. A25L016 Series Release from Deep Power-down Electronic Signature (RES) and edge of Serial Clock (C). Then, the 8-bit Electronic Signature, stored in the memory, is shifted out on Serial Data Output (DO), each bit being shifted out during the falling edge of Serial Clock (C). The instruction sequence is shown in Figure 19. The Release from Deep Power-down and Read Electronic Signature (RES) instruction is terminated by driving Chip Read Once the device has entered the Deep Power-down mode, all instructions are ignored except the Release from Deep Power-down and Read Electronic Signature (RES) instruction. Executing this instruction takes the device out of the Deep Power-down mode. Select ( S ) High after the Electronic Signature has been read at least once. Sending additional clock cycles on Serial Clock The instruction can also be used to read, on Serial Data Output (DO), the 8-bit Electronic Signature, whose value for the A25L032 is 15h, and for A25L016 is 14h. (C), while Chip Select ( S ) is driven Low, cause the Electronic Signature to be output repeatedly. Except while an Erase, Program or Write Status Register cycle is in progress, the Release from Deep Power-down and Read Electronic Signature (RES) instruction always provides access to the 8-bit Electronic Signature of the device, and can be applied even if the Deep Power-down mode has not been entered. When Chip Select ( S ) is driven High, the device is put in the Stand-by Power mode. If the device was not previously in the Deep Power-down mode, the transition to the Stand-by Power mode is immediate. If the device was previously in the Deep Power-down mode, though, the transition to the Stand- Any Release from Deep Power-down and Read Electronic Signature (RES) instruction while an Erase, Program or Write Status Register cycle is in progress, is not decoded, and has no effect on the cycle that is in progress. by Power mode is delayed by tRES2, and Chip Select ( S ) must remain High for at least tRES2 (max), as specified in AC Characteristics Table . Once in the Stand-by Power mode, the device waits to be selected, so that it can receive, decode and execute instructions. The device is first selected by driving Chip Select ( S ) Low. The instruction code is followed by 3 dummy bytes, each bit being latched-in on Serial Data Input (DIO) during the rising Figure 19. Release from Deep Power-down and Read Electronic Signature (RES) Instruction Sequence and Data-Out Sequence S 0 1 2 3 4 5 6 7 8 9 10 28 29 30 31 32 33 34 35 36 37 38 C Instruction 23 22 21 DIO tRES2 3 Dummy Bytes 3 2 1 0 MSB DO High Impedance 7 6 5 4 3 2 1 0 MSB Deep Power-down Mode Stand-by Mode Note: The value of the 8-bit Electronic Signature is 14h. (April, 2008, Version 0.0) 26 AMIC Technology Corp. A25L016 Series Figure 20. Release from Deep Power-down (RES) Instruction Sequence S C 0 1 2 3 4 5 6 tRES1 7 Instruction DIO DO High Impedance Deep Power-down Mode Driving Chip Select ( S ) High after the 8-bit instruction byte has been received by the device, but before the whole of the 8-bit Electronic Signature has been transmitted for the first time (as shown in Figure 20.), still insures that the device is put into Stand-by Power mode. If the device was not previously in the Deep Power-down mode, the transition to the Stand-by Power mode is immediate. If the device was (April, 2008, Version 0.0) Stand-by Mode previously in the Deep Power-down mode, though, the transition to the Stand-by Power mode is delayed by tRES1, and Chip Select ( S ) must remain High for at least tRES1 (max), as specified in AC Characteristics Table. Once in the Stand-by Power mode, the device waits to be selected, so that it can receive, decode and execute instructions. 27 AMIC Technology Corp. A25L016 Series POWER-UP AND POWER-DOWN tPUW after VCC passed the VWI threshold - tVSL afterVCC passed the VCC(min) level These values are specified in Table 8. If the delay, tVSL, has elapsed, after VCC has risen above VCC(min), the device can be selected for READ instructions even if the tPUW delay is not yet fully elapsed. At Power-up, the device is in the following state: At Power-up and Power-down, the device must not be selected (that is Chip Select ( S ) must follow the voltage applied on VCC) until VCC reaches the correct value: VCC (min) at Power-up, and then for a further delay of tVSL VSS at Power-down Usually a simple pull-up resistor on Chip Select ( S ) can be used to insure safe and proper Power-up and Power-down. To avoid data corruption and inadvertent write operations during power up, a Power On Reset (POR) circuit is included. The logic inside the device is held reset while VCC is less than the POR threshold value, VWI – all operations are disabled, and the device does not respond to any instruction. Moreover, the device ignores all Write Enable (WREN), Page Program (PP), Sector Erase (SE), Block Erase (BE), Chip Erase (CE) and Write Status Register (WRSR) instructions until a time delay of tPUW has elapsed after the moment that VCC rises above the VWI threshold. However, the correct operation of the device is not guaranteed if, by this time, VCC is still below VCC(min). No Write Status Register, Program or Erase instructions should be sent until the later of: The device is in the Standby mode (not the Deep Power-down mode). The Write Enable Latch (WEL) bit is reset. Normal precautions must be taken for supply rail decoupling, to stabilize the VCC feed. Each device in a system should have the VCC rail decoupled by a suitable capacitor close to the package pins. (Generally, this capacitor is of the order of 0.1µF). At Power-down, when VCC drops from the operating voltage, to below the POR threshold value, VWI, all operations are disabled and the device does not respond to any instruction. (The designer needs to be aware that if a Power-down occurs while a Write, Program or Erase cycle is in progress, some data corruption can result.) Figure 21. Power-up Timing VCC VCC(max) VCC(min) tPU Full Device Access time (April, 2008, Version 0.0) 28 AMIC Technology Corp. A25L016 Series Table 8. Power-Up Timing Symbol VCC(min) tPU Parameter Min. VCC (minimum) VCC (min) to device operation Max. Unit 2.7 V 5 ms Note: These parameters are characterized only. INITIAL DELIVERY STATE The device is delivered with the memory array erased: all bits are set to 1 (each byte contains FFh). The Status Register contains 00h (all Status Register bits are 0). (April, 2008, Version 0.0) 29 AMIC Technology Corp. A25L016 Series Absolute Maximum Ratings* *Comments Storage Temperature (TSTG) . . . . . . . . . . -65°C to + 150°C Lead Temperature during Soldering (Note 1) D.C. Voltage on Any Pin to Ground Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.6V to VCC+0.6V Transient Voltage (<20ns) on Any Pin to Ground Potential . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2.0V to VCC+2.0V Supply Voltage (VCC) . . . . . . . . . . . . . . . . . . -0.6V to +4.0V Electrostatic Discharge Voltage (Human Body model) (VESD) (Note 2) . . . . . . . . . . . . . . . . . . . -2000V to 2000V Stressing the device above the rating listed in the Absolute Maximum Ratings" table may cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating conditions for extended periods may affect device reliability. Refer also to the AMIC SURE Program and other relevant quality documents. Notes: 1. Compliant with JEDEC Std J-STD-020B (for small body, Sn-Pb or Pb assembly). 2. JEDEC Std JESD22-A114A (C1=100 pF, R1=1500 Ω , R2=500Ω) DC AND AC PARAMETERS This section summarizes the operating and measurement conditions, and the DC and AC characteristics of the device. The parameters in the DC and AC Characteristic tables that follow are derived from tests performed under the Measurement Conditions summarized in the relevant tables. Designers should check that the operating conditions in their circuit match the measurement conditions when relying on the quoted parameters. Table 9. Operating Conditions Symbol Parameter Min. Max. Unit VCC Supply Voltage 2.7 3.6 V TA Ambient Operating Temperature –40 85 °C Table 10. Data Retention and Endurance Parameter Condition Min. Max. Unit Erase/Program Cycles At 85°C 100,000 Cycles per Sector Data Retention At 85°C 20 Years Note: 1. This is preliminary data Table 11. Capacitance Symbol Parameter COUT Output Capacitance (DO) CIN Input Capacitance (other pins) Test Condition Min. Max. Unit VOUT = 0V 8 pF VIN = 0V 6 pF Note: Sampled only, not 100% tested, at TA=25°C and a frequency of 33 MHz. (April, 2008, Version 0.0) 30 AMIC Technology Corp. A25L016 Series Table 12. DC Characteristics Symbol Parameter Test Condition Min. Max. Unit ILI Input Leakage Current ±2 µA ILO Output Leakage Current ±2 µA ICC1 Standby Current 5 µA ICC2 Deep Power-down Current S = VCC, VIN = VSS or VCC S = VCC, VIN = VSS or VCC 5 µA ICC3 Operating Current (READ) C= 0.1VCC / 0.9.VCC at 50MHz, DO = open 30 mA C= 0.1VCC / 0.9.VCC at 33MHz, DO = open 25 mA ICC4 Operating Current (PP) 15 mA ICC5 Operating Current (WRSR) S = VCC S = VCC 15 mA ICC6 Operating Current (SE) 15 mA ICC7 Operating Current (BE) S = VCC S = VCC 15 mA VIL Input Low Voltage –0.5 0.3VCC V VIH Input High Voltage 0.7VCC VCC+0.4 V VOL Output Low Voltage IOL = 1.6mA 0.4 V VOH Output High Voltage IOH = –100µA VCC–0.2 V Note: 1. This is preliminary data at 85°C Table 13. Instruction Times Symbol Alt. Parameter Min. Typ. Max. Unit 5 15 ms tW Write Status Register Cycle Time tPP Page Program Cycle Time 0.8 2.4 ms tSE Sector Erase Cycle Time 0.06 0.24 s tBE Block Erase Cycle Time 0.5 2 s tCE Chip Erase Cycle Time 16 64 s Note: 1. At 85°C 2. This is preliminary data Table 14. AC Measurement Conditions Symbol CL Parameter Min. Load Capacitance Max. 30 Input Rise and Fall Times Unit pF 5 ns Input Pulse Voltages 0.2VCC to 0.8VCC V Input Timing Reference Voltages 0.3VCC to 0.7VCC V VCC / 2 V Output Timing Reference Voltages Note: Output Hi-Z is defined as the point where data out is no longer driven. (April, 2008, Version 0.0) 31 AMIC Technology Corp. A25L016 Series Figure 22. AC Measurement I/O Waveform Input Levels Input and Output Timing Reference Levels 0.8VCC 0.7VCC 0.5VCC 0.3VCC 0.2VCC (April, 2008, Version 0.0) 32 AMIC Technology Corp. A25L016 Series Table 15. AC Characteristics Symbol Alt. Parameter Min. fC fC Clock Frequency for the following instructions: FAST_READ, PP, SE, BE, DP, RES, RDID, WREN, WRDI, RDSR, WRSR Clock Frequency for READ instructions fR tCH 1 tCL 1 Typ. Max. Unit D.C. 100 MHz D.C. 50 MHz tCLH Clock High Time 6 ns tCLL Clock Low Time 5 ns tCLCH 2 Clock Rise Time (peak to peak) 0.1 V/ns tCHCL 2 3 0.1 V/ns S Active Setup Time (relative to C) 5 ns S Not Active Hold Time (relative to C) 5 ns tSLCH 3 Clock Fall Time (peak to peak) tCSS tCHSL tDVCH tDSU Data In Setup Time 5 ns tCHDX tDH Data In Hold Time 5 ns tCHSH S Active Hold Time (relative to C) 5 ns tSHCH S Not Active Setup Time (relative to C) 5 ns 100 ns tSHSL tCSH tSHQZ 2 tDIS Output Disable Time 8 ns tCLQV tV Clock Low to Output Valid 8 ns tCLQX tHO Output Hold Time 0 ns tHLCH HOLD Setup Time (relative to C) 5 ns tCHHH HOLD Hold Time (relative to C) 5 ns tHHCH HOLD Setup Time (relative to C) 5 ns tCHHL HOLD Hold Time (relative to C) 5 ns S Deselect Time tHHQX 2 tLZ HOLD to Output Low-Z 8 ns tHLQZ 2 tHZ HOLD to Output High-Z 8 ns tWHSL 4 Write Protect Setup Time 20 ns tSHWL 4 Write Protect Hold Time 100 ns tDP 2 S High to Deep Power-down Mode 3 µs tRES1 2 S High to Standby Mode without Electronic Signature Read 30 µs tRES2 2 S High to Standby Mode with Electronic Signature Read 30 µs 5 15 ms ms tW Write Status Register Cycle Time tpp Page Program Cycle Time 0.8 2.4 tSE Sector Erase Cycle Time 0.06 0.24 s tBE Block Erase Cycle Time 0.5 2 s tCE Chip Erase Cycle Time 16 64 s Note: 1. tCH + tCL must be greater than or equal to 1/ fC 2. Value guaranteed by characterization, not 100% tested in production. 3. Expressed as a slew-rate. 4. Only applicable as a constraint for a WRSR instruction when SRWD is set at 1. (April, 2008, Version 0.0) 33 AMIC Technology Corp. A25L016 Series Figure 23. Serial Input Timing tSHSL S tCHSL tSLCH tCHSH C tCHCL tDVCH tCLCH tCHDX DIO DO tSHCH MSB IN LSB IN High Impedance Figure 24. Write Protect Setup and Hold Timing during WRSR when SRWD=1 W tSHWL tWHSL S C DIO DO (April, 2008, Version 0.0) High Impedance 34 AMIC Technology Corp. A25L016 Series Figure 25. Hold Timing S tHLCH tHHCH tCHHL C tCHHH DIO tHLQZ tHHQX DO HOLD Figure 26. Output Timing S tCH C DIO ADDR.LSB IN tCLQV tCLQX tCL tCLQV tSHQZ tCLQX DO LSB OUT tQLQH tQHQL (April, 2008, Version 0.0) 35 AMIC Technology Corp. A25L016 Series Part Numbering Scheme A25 X XXX X X X X Package Material Blank: normal F: PB free Temperature* Blank = 0°C ~ +70°C U = -40°C ~ +85°C Package Type Blank = DIP8 M = 209 mil SOP 8 N = 300 mil SOP 16 Device Version* Blank = The first version Device Density 512 = 512 Kbit (4KB uniform sectors) 010 = 1 Mbit (4KB uniform sectors) 020 = 2 Mbit (4KB uniform sectors) 040 = 4 Mbit (4KB uniform sectors) 080 = 8 Mbit (4KB uniform sectors) 016 = 16 Mbit (4KB uniform sectors) 032 = 32 Mbit (4KB uniform sectors) Device Voltage L = 2.7-3.6V Device Type A25 = AMIC Serial Flash * Optional (April, 2008, Version 0.0) 36 AMIC Technology Corp. A25L016 Series Ordering Information Part No. Speed (MHz) Active Read Current Typ. (mA) Program/Erase Current Typ. (mA) Standby Current Typ. (μA) Package A25L016-F 8 Pin Pb-Free DIP (300 mil) A25L016-UF 8 Pin Pb-Free DIP (300 mil) A25L016M-F 100 30 15 A25L016M-UF 5 8 Pb-Free Pin SOP (209mil) 8 Pb-Free Pin SOP (209mil) A25L016N-F 16 Pb-Free Pin SOP (300mil) A25L016N-UF 16 Pb-Free Pin SOP (300mil) Blank is for commercial operating temperature range: 0°C ~ +70°C -U is for industrial operating temperature range: -40°C ~ +85°C (April, 2008, Version 0.0) 37 AMIC Technology Corp. A25L016 Series Package Information unit: inches/mm P-DIP 8L Outline Dimensions Dimensions in inches Dimensions in mm Symbol Min Nom Max Min Nom Max A - - 0.180 - - 4.57 A1 0.015 - - 0.38 - - A2 0.128 0.130 0.136 3.25 3.30 3.45 B 0.014 0.018 0.022 0.36 0.46 0.56 B1 0.050 0.060 0.070 1.27 1.52 1.78 B2 0.032 0.039 0.046 0.81 0.99 1.17 C D 0.008 0.350 0.010 0.360 0.013 0.370 0.20 8.89 0.25 9.14 0.33 9.40 E 0.290 0.300 0.315 7.37 7.62 8.00 E1 0.254 0.260 0.266 6.45 6.60 6.76 e1 - 0.100 - - 2.54 - L 0.125 - - 3.18 - - EA 0.345 - 0.385 8.76 - 9.78 S 0.016 0.021 0.026 0.41 0.53 0.66 Notes: 1. Dimension D and E1 do not include mold flash or protrusions. 2. Dimension B1 does not include dambar protrusion. 3. Tolerance: ±0.010” (0.25mm) unless otherwise specified. (April, 2008, Version 0.0) 38 AMIC Technology Corp. A25L016 Series Package Information unit: mm 5 1 4 E 8 E1 SOP 8L (209mil) Outline Dimensions C A2 A D GAGE PLANE SEATING PLANE A1 b θ 0.25 e L Dimensions in mm Symbol Min Nom Max A 1.75 1.95 2.16 A1 0.05 0.15 0.25 A2 1.70 1.80 1.91 0.48 b 0.35 0.42 C 0.19 0.20 0.25 D 5.13 5.23 5.33 E 7.70 7.90 8.10 E1 5.18 5.28 5.38 e 1.27 BSC L 0.50 0.65 0.80 θ 0° - 8° Notes: Maximum allowable mold flash is 0.15mm at the package ends and 0.25mm between leads (April, 2008, Version 0.0) 39 AMIC Technology Corp. A25L016 Series Package Information unit: inches/mm SOP 16L (300mil) Outline Dimensions D C 9 16 H E 1 0.02 (0.41) x 45 o 8 e A b D SEATING PLANE θ A1 0.10 C L Dimensions in inch Dimensions in mm Symbol Min Max Min Max A 0.093 0.104 2.36 2.65 A1 0.004 0.012 0.10 0.30 b 0.016 Typ. 0.41 Typ. C 0.008 Typ. 0.20 Typ. D 0.398 0.413 10.10 10.50 E 0.291 0.299 7.39 7.60 e 0.050 Typ. 1.27 Typ. H 0.394 0.419 10.01 10.64 L 0.016 0.050 0.40 1.27 θ 0° 8° 0° 8° Notes: 1. Dimensions “D” does not include mold flash, protrusions or gate burrs. 2. Dimensions “E” does not include interlead flash, or protrusions. (April, 2008, Version 0.0) 40 AMIC Technology Corp.