M28F201 2 Mb (256K x 8, Chip Erase) FLASH MEMORY 5V ± 10% SUPPLY VOLTAGE 12V PROGRAMMING VOLTAGE FAST ACCESS TIME: 70ns BYTE PROGRAMMING TIME: 10µs typical ELECTRICAL CHIP ERASE in 1s RANGE LOW POWER CONSUMPTION – Active Current: 15mA typical – Stand-by Current: 10µA typical 10,000 PROGRAM/ERASE CYCLES INTEGRATED ERASE/PROGRAM-STOP TIMER OTP COMPATIBLE PACKAGES and PINOUTS ELECTRONIC SIGNATURE – Manufacturer Code: 20h – Device Code: F4h DESCRIPTION The M28F201 FLASH Memory product is a nonvolatile memories which may be erased electrically at the chip level and programmed byte-by-byte. It is organised as 256K bytes. It uses a command register architecture to select the operating modes and thus provide a simple microprocessor interface. The M28F201 FLASH Memory product is suitable for applications where the memory has to be reprogrammed in the equipment. The access time of 70ns makes the device suitable for use in high speed microprocessor systems. PLCC32 (K) TSOP32 (N) 8 x 20 mm Figure 1. Logic Diagram VCC VPP 18 8 A0-A17 W DQ0-DQ7 M28F201 E Table 1. Signal Names A0-A17 Address Inputs DQ0-DQ7 Data Inputs / Outputs E Chip Enable G Output Enable W Write Enable VPP Program Supply VCC Supply Voltage VSS Ground April 1997 G VSS AI00637C 1/21 M28F201 Figure 2B. TSOP Pin Connections A12 A15 A16 VPP VCC W A17 Figure 2A. LCC Pin Connections 1 32 A7 A6 A5 A4 A3 A2 A1 A0 DQ0 9 M28F201 25 A14 A13 A8 A9 A11 G A10 E DQ7 DQ1 DQ2 VSS DQ3 DQ4 DQ5 DQ6 17 AI00638C A11 A9 A8 A13 A14 A17 W VCC VPP A16 A15 A12 A7 A6 A5 A4 32 1 8 9 16 M28F201 (Normal) 25 24 17 G A10 E DQ7 DQ6 DQ5 DQ4 DQ3 VSS DQ2 DQ1 DQ0 A0 A1 A2 A3 AI00639C Figure 2C. TSOP Reverse Pin Connections G A10 E DQ7 DQ6 DQ5 DQ4 DQ3 VSS DQ2 DQ1 DQ0 A0 A1 A2 A3 1 8 9 16 32 M28F201 (Reverse) 25 24 17 AI00640D 2/21 A11 A9 A8 A13 A14 A17 W VCC VPP A16 A15 A12 A7 A6 A5 A4 DEVICE OPERATION The M28F201 FLASH Memory product employs a technology similar to a 2 Megabit EPROM but add to the device functionality by providing electrical erasure and programming. These functions are managed by a command register. The functions that are addressed via the command register depend on the voltage applied to the VPP, program voltage, input. When VPP is less than or equal to 6.5V, the command register is disabled and the M28F201 functions as a read only memory providing operating modes similar to an EPROM (Read, Output Disable, Electronic Signature Read and Standby). When VPP is raised to 12V the command register is enabled and this provides, in addition, Erase and Program operations. READ ONLY MODES, VPP ≤ 6.5V For all Read Only Modes, except Standby Mode, the Write Enable input W should be High. In the Standby Mode this input is ’don’t care’. Read Mode. The M28F201 has two enable inputs, E and G, both of which must be Low in order to output data from the memory. The Chip Enable (E) is the power control and should be used for device selection. Output Enable (G) is the output control and should be used to gate data on to the output, independantof the device selection. M28F201 Table 2. Absolute Maximum Ratings Symbol Value Unit Ambient Operating Temperature –40 to 125 °C Storage Temperature –65 to 150 °C VIO Input or Output Voltages –0.6 to 7 V VCC Supply Voltage –0.6 to 7 V VA9 A9 Voltage –0.6 to 13.5 V VPP Program Supply Voltage, during Erase or Programming –0.6 to 14 V TA TSTG Parameter Note: Except for the rating ”Operating Temperature Range”, stresses above those listed in the Table ”Absolute Maximum Ratings” 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 SGS-THOMSON SURE Program and other relevant quality documents. Table 3. Operations (1) VPP Read Only Read/Write (2) VPPL Operation E G W A9 DQ0 - DQ7 Read VIL VIL VIH A9 Data Output Output Disable VIL VIH VIH X Hi-Z Standby VIH X X X Hi-Z Electronic Signature VIL VIL VIH VID Codes Read VIL VIL VIH A9 Data Output Write VIL VIH VIL Pulse A9 Data Input Output Disable VIL VIH VIH X Hi-Z Standby VIH X X X Hi-Z VPPH Notes: 1. X = VIL or VIH. 2. Refer also to the Command table. Table 4. Electronic Signature Identifier A0 DQ7 DQ6 DQ5 DQ4 DQ3 DQ2 DQ1 DQ0 Hex Data Manufacturer’s Code VIL 0 0 1 0 0 0 0 0 20h Device Code VIH 1 1 1 1 0 1 0 0 F4h 3/21 M28F201 Table 5. Commands (1) Command 1st Cycle Cycles 2nd Cycle Operation A0-A17 DQ0-DQ7 Read 1 Write X 00h Electronic (2) Signature 2 Write X 80h or 90h Setup Erase/ 2 Write X Setup Program/ 2 2 A0-A17 DQ0-DQ7 Read 00000h 20h Read 00001h F4h Write X 20h Read X Data Output Write A0-A17 Data Input 20h Erase Erase Verify Operation Write A0-A17 A0h Write X 40h Program Program Verify 2 Write X C0h Read X Data Output Reset 2 Write X FFh Write X FFh Notes: 1. X = VIL or VIH. 2. Refer also to the Electronic Signature table. Standby Mode. In the Standby Mode the maximum supply current is reduced. The device is placed in the Standby Mode by applying a High level to the Chip Enable (E) input. When in the Standby Mode the outputs are in a high impedance state, independant of the Output Enable (G) input. Output Disable Mode. When the Output Enable (G) is High the outputs are in a high impedance state. Electronic Signature Mode. This mode allows the read out of two binary codes from the device which identify the manufacturer and device type. This mode is intended for use by programming equipment to automatically select the correct erase and programming algorithms. The Electronic Signature Mode is active when a high voltage (11.5V to 13V) is applied to address line A9 with E and G Low. With A0 Low the output data is the manufacturer code, when A0 is High the output is the device code. All other address lines should be maintained Low while reading the codes. The electronic signature can also be accessed in Read/Write modes. READ/WRITE MODES, 11.4V ≤ VPP ≤ 12.6V When VPP is High both read and write operations may be performed. These are defined by the contents of an internal command register. Commands may be written to this register to set-up and execute, Erase, Erase Verify, Program, Program Verify and Reset modes. Each of these modes needs 2 cycles. Each mode starts with a write operation to set-up the command, this is followed by either read or write operations. The device expects the first cycle to be a write operation and does not corrupt 4/21 data at any location in the memory. Read mode is set-up with one cycle only and may be followed by any number of read operations to output data. Electronic Signature Read mode is set-up with one cycle and followed by a read cycle to output the manufacturer or device codes. Awrite to the command register is made by bringing W Low while E is Low. The falling edge of W latches Addresses, while the rising edge latches Data, which are used for those commands that require address inputs, command input or provide data output. The supply voltage VCC and the program voltage VPP can be applied in any order. When the device is powered up or when VPP is ≤ 6.5V the contents of the command register defaults to 00h, thus automatically setting-up Read operations. In addition a specific command may be used to set the command register to 00h for reading the memory. The system designer may chose to provide a constant high VPP and use the register commands for all operations, or to switch the VPP from low to high only when needing to erase or program the memory. All command register access is inhibited when VCC falls below the Erase/Write Lockout Voltage (VLKO) of 2.5V. If the device is deselected during Erasure, Programming or verifying it will draw active supply currents until the operations are terminated. The device is protected against stress caused by long erase or program times. If the end of Erase or Programming operations are not terminated by a Verify cycle within a maximum time permitted, an internal stop timer automatically stops the operation. The device remains in an inactive state, ready to start a Verify or Reset Mode operation. M28F201 Table 6. AC Measurement Conditions SRAM Interface Levels EPROM Interface Levels Input Rise and Fall Times ≤ 10ns ≤ 10ns Input Pulse Voltages 0 to 3V 0.45V to 2.4V 1.5V 0.8V and 2V Input and Output Timing Ref. Voltages Figure 3. AC Testing Input Output Waveform Figure 4. AC Testing Load Circuit 1.3V SRAM Interface 1N914 3V 1.5V 3.3kΩ 0V DEVICE UNDER TEST EPROM Interface 2.4V OUT CL = 30pF or 100pF 2.0V 0.8V 0.45V CL = 30pF for SRAM Interface CL = 100pF for EPROM Interface AI01275 CL includes JIG capacitance AI01276 Table 7. Capacitance (1) (TA = 25 °C, f = 1 MHz ) Symbol CIN COUT Parameter Test Condition Max Unit VIN = 0V 6 pF VOUT = 0V 12 pF Input Capacitance Output Capacitance Min Note: 1. Sampled only, not 100% tested. Read Mode. The Read Mode is the default at power up or may be set-up by writing 00h to the command register. Subsequent read operations output data from the memory. The memory remains in the Read Mode until a new command is written to the command register. Electronic Signature Mode. In order to select the correct erase and programming algorithms for onboard programming, the manufacturer and device codes may be read directly. It is not neccessary to apply a high voltage to A9 when using the command register. The Electronic Signature Mode is set-up by writing 80h or 90h to the command register. The following read cycles, with address inputs 00000h or 00001h, output the manufacturer or device codes. The command is terminated by writing another valid command to the command register (for example Reset). 5/21 M28F201 Table 8. DC Characteristics (TA = 0 to 70 °C, –40 to 85 °C or –40 to 125 °C; VCC = 5V ± 10%) Symbol Parameter Test Condition ILI Input Leakage Current ILO Output Leakage Current ICC Supply Current (Read) ICC1 Supply Current (Standby) TTL Supply Current (Standby) CMOS ICC2 (1) Supply Current (Programming) ICC3 (1) Supply Current (Program Verify) ICC4 (1) Supply Current (Erase) ICC5 (1) Supply Current (Erase Verify) Min Max Unit 0V ≤ VIN ≤ VCC ±1 µA 0V ≤ VOUT ≤ VCC ±10 µA E = VIL, f = 10MHz 30 mA E = VIH 1 mA E = VCC ± 0.2V 100 µA During Programming 10 mA During Verify 20 mA During Erasure 20 mA During Erase Verify) 20 mA ILPP Program Leakage Current VPP ≤ VCC ±10 µA IPP Program Current (Read or Standby) VPP > VCC 200 µA VPP ≤ VCC ±10 µA VPP = VPPH, During Programming 30 mA (1) IPP1 Program Current (Programming) (1) Program Current (Program Verify) VPP = VPPH, During Verify 5 mA IPP3 (1) Program Current (Erase) VPP = VPPH, During Erase 30 mA (1) IPP4 Program Current (Erase Verify) VPP = VPPH, During Erase Verify 5 mA –0.5 0.8 V 2 VCC + 0.5 V 0.7 VCC VCC + 0.5 V 0.45 V IPP2 VIL VIH Input Low Voltage Input High Voltage TTL Input High Voltage CMOS VOL VOH Output Low Voltage Output High Voltage CMOS Output High Voltage TTL VPPL Program Voltage (Read Operations) VPPH VID IID (1) VLKO IOH = –100µA VCC – 0.4 V IOH = –2.5mA 0.85 VCC V IOH = –2.5mA 2.4 V 0 6.5 V Program Voltage (Read/Write Operations) 11.4 12.6 V A9 Voltage (Electronic Signature) 11.5 13 V 200 µA A9 Current (Electronic Signature) Supply Voltage, Erase/Program Lock-out Note: 1. Not 100% tested. Characterisation Data available. 6/21 IOL = 5.8mA A9 = VID 2.5 V M28F201 Table 9. Read Only Mode AC Characteristics ((TA = 0 to 70 °C, –40 to 85 °C or –40 to 125 °C) M28F201 Symbol Alt Parameter Test Condition Write Enable High to Output Enable Low tWHGL tAVAV tRC Read Cycle Time E = VIL, G = VIL tAVQV tACC Address Valid to Output Valid E = VIL, G = VIL tELQX (1) tELQV tGLQX (1) tGLQV (1) tAXQX -90 -120 -150 VCC = 5V±10% VCC = 5V±10% VCC = 5V±10% VCC = 5V±10% EPROM Interface EPROM Interface EPROM Interface EPROM Interface Min Min Min Min Max Max Max Unit Max 6 6 6 6 µs 70 90 120 150 ns 70 90 120 tLZ Chip Enable Low to Output Transition G = VIL tCE Chip Enable Low to Output Valid G = VIL tOLZ Output Enable Low to Output Transition E = VIL tOE Output Enable Low to Output Valid E = VIL Chip Enable High to Output Hi-Z G = VIL 0 25 0 30 0 30 tDF Output Enable High to Output Hi-Z E = VIL 0 25 0 30 0 30 tOH Address Transition to Output Transition E = VIL, G = VIL 0 tEHQZ (1) tGHQZ -70 0 0 70 0 0 90 0 25 0 120 0 30 0 150 0 ns 150 0 35 ns ns ns 40 ns 0 35 ns 0 35 ns 0 ns Note: 1. Sampled only, not 100% tested Erase and Erase Verify Modes. The memory is erased by first Programming all bytes to 00h, the Erase command then erases them to FFh. The Erase Verify command is then used to read the memory byte-by-byte for a content of FFh. The Erase Mode is set-up by writing 20h to the command register. The write cycle is then repeated to start the erase operation. Erasure starts on the rising edge of W during this second cycle. Erase is followed by an Erase Verify which reads an addressed byte. Erase Verify Mode is set-up by writing A0h to the command register and at the same time supplying the address of the byte to be verified. The rising edge of W during the set-up of the first Erase Verify Mode stops the Erase operation. The following read cycle is made with an internally generated margin voltage applied; reading FFh indicates that all bits of the addressedbyte are fully erased. The whole contents of the memory are verified by repeating the Erase Verify Operation, first writing the set-up code A0h with the address of the byte to be verified and then reading the byte contents in a second read cycle. As the Erase algorithm flow chart shows, when the data read during Erase Verify is not FFh, another Erase operation is performed and verification continues from the address of the last verified byte. The command is terminated by writing another valid command to the command register (for example Program or Reset). 7/21 M28F201 Figure 5. Read Mode AC Waveforms tAVAV A0-A17 tAVQV tAXQX E tELQV tEHQZ tELQX G tGLQV tGHQZ tGLQX DQ0-DQ7 DATA OUT AI00642 Figure 6. Read Command Waveforms VPP tVPHEL VALID A0-A17 tAVQV tAXQX E tELWL tWHEH tELQV tEHQZ G tGHWL tWHGL tGHQZ W tWLWH tGLQV tDVWH DQ0-DQ7 tWHDX COMMAND READ SET-UP DATA OUT READ AI00643 8/21 M28F201 Figure 7. Electronic Signature Command Waveforms VPP tVPHEL 00000h-00001h A0-A17 tAVQV tAXQX E tELWL tWHEH tELQV tEHQZ G tGHWL tWHGL tGHQZ W tWLWH tGLQV tDVWH DQ0-DQ7 tWHDX COMMAND READ ELECTRONIC SIGNATURE SET-UP DATA OUT READ MANUFACTURER OR DEVICE AI00644 Program and Program Verify Modes. The Program Mode is set-up by writing 40h to the command register. This is followed by a second write cycle which latches the address and data of the byte to be programmed. The rising edge of W during this second cycle starts the programming operation. Programming is followed by a Program Verify of the data written. Program Verify Mode is set-up by writing C0h to the command register. The rising edge of W during the set-up of the Program Verify Mode stops the Pro- gramming operation. The following read cycle, of the address already latched during programming, is made with an internally generated margin voltage applied, reading valid data indicates that all bits have been programmed. Reset Mode. This command is used to safely abort Erase or Program Modes. The Reset Mode is set-up and performed by writing FFh two times to the command register. The command should be followed by writing a valid command to the the command register (for example Read). 9/21 M28F201 Table 10A. Read/Write Mode AC Characteristics, W and E Controlled (TA = 0 to 70 °C, –40 to 85 °C or –40 to 125 °C) M28F201 Symbol Alt Parameter -70 -90 VCC = 5V ± 10% VCC = 5V ± 10% EPROM Interface EPROM Interface Min Max Min Unit Max tVPHEL VPP High to Chip Enable Low 1 1 µs tVPHWL VPP High to Write Enable Low 1 1 µs tWHWH3 tWC Write Cycle Time (W controlled) 70 90 ns tEHEH3 tWC Write Cycle Time (E controlled) 70 90 ns tAVWL tAS Address Valid to Write Enable Low 0 0 ns tAVEL tWLAX tAH tELAX tELWL 0 0 ns Write Enable Low to Address Transition 30 45 ns Chip Enable Low to Address Transition 30 45 ns Chip Enable Low to Write Enable Low 0 0 ns tWLEL Write Enable Low to Chip Enable Low 0 0 ns tGHWL Output Enable High to Write Enable Low 0 0 µs tGHEL Output Enable High to Chip Enable Low 0 0 µs Input Valid to Write Enable High 30 45 ns tDVWH tCS Address Valid to Chip Enable Low tDS tDVEH Input Valid to Chip Enable High 30 45 ns Write Enable Low to Write Enable High (Write Pulse) 30 45 ns Chip Enable Low to Chip Enable High (Write Pulse) 50 60 ns Write Enable High to Input Transition 10 10 ns Chip Enable High to Input Transition 10 10 ns tWHWH1 Duration of Program Operation (W contr.) 10 10 µs tEHEH1 Duration of Program Operation (E contr.) 10 10 µs tWHWH2 Duration of Erase Operation (W contr.) 9.5 9.5 ms Duration of Erase Operation (E contr.) 9.5 9.5 ms Write Enable High to Chip Enable High 0 0 ns Chip Enable High to Write Enable High 0 0 ns tWLWH tWP tELEH tWHDX tDH tEHDX tEHEH2 tWHEH tCH tEHWH tWHWL Write Enable High to Write Enable Low 10 20 ns tEHEL Chip Enable High to Chip Enable Low 10 20 ns tWHGL Write Enable High to Output Enable Low 6 6 µs tEHGL Chip Enable High to Output Enable Low 6 6 µs tAVQV tELQX (1) tELQV tGLQX (1) tGLQV tEHQZ tWPH tACC Addess Valid to data Output ns 90 ns tLZ Chip Enable Low to Output Transition Chip Enable Low to Output Valid tOLZ Output Enable Low to Output Transition tOE Output Enable Low to Output Valid 25 30 ns Chip Enable High to Output Hi-Z 25 30 ns 30 ns (1) tDF Output Enable High to Output Hi-Z tAXQX tOH Address Transition to Output Transition Note: 1. Sampled only, not 100% tested 0 90 tCE tGHQZ (1) 10/21 70 0 70 0 0 25 0 ns 0 ns ns M28F201 Table 10B. Read/Write Mode AC Characteristics, W and E Controlled (TA = 0 to 70 °C, –40 to 85 °C or –40 to 125 °C) M28F201 Symbol Alt Parameter -120 -150 VCC = 5V ± 10% VCC = 5V ± 10% EPROM Interface EPROM Interface Min Max Min Unit Max tVPHEL VPP High to Chip Enable Low 1 1 µs tVPHWL VPP High to Write Enable Low 1 1 µs tWHWH3 tWC Write Cycle Time (W controlled) 120 150 ns tEHEH3 tWC Write Cycle Time (E controlled) 120 150 ns tAVWL tAS Address Valid to Write Enable Low 0 0 ns tAVEL tWLAX tAH tELAX tELWL 0 0 ns Write Enable Low to Address Transition 50 50 ns Chip Enable Low to Address Transition 60 80 ns Chip Enable Low to Write Enable Low 0 0 ns tWLEL Write Enable Low to Chip Enable Low 0 0 ns tGHWL Output Enable High to Write Enable Low 0 0 µs tGHEL Output Enable High to Chip Enable Low 0 0 µs Input Valid to Write Enable High 50 50 ns tDVWH tCS Address Valid to Chip Enable Low tDS tDVEH Input Valid to Chip Enable High 50 50 ns Write Enable Low to Write Enable High (Write Pulse) 50 60 ns Chip Enable Low to Chip Enable High (Write Pulse) 70 80 ns Write Enable High to Input Transition 10 10 ns Chip Enable High to Input Transition 10 10 ns tWHWH1 Duration of Program Operation (W contr.) 10 10 µs tEHEH1 Duration of Program Operation (E contr.) 10 10 µs tWHWH2 Duration of Erase Operation (W contr.) 9.5 9.5 ms Duration of Erase Operation (E contr.) 9.5 9.5 ms Write Enable High to Chip Enable High 0 0 ns Chip Enable High to Write Enable High 0 0 ns tWLWH tWP tELEH tWHDX tDH tEHDX tEHEH2 tWHEH tCH tEHWH tWHWL Write Enable High to Write Enable Low 20 20 ns tEHEL Chip Enable High to Chip Enable Low 20 20 ns tWHGL Write Enable High to Output Enable Low 6 6 µs tEHGL Chip Enable High to Output Enable Low 6 6 µs tAVQV tELQX (1) tELQV tGLQX (1) tGLQV tEHQZ tWPH tACC Addess Valid to data Output 120 tLZ Chip Enable Low to Output Transition Chip Enable Low to Output Valid tOLZ Output Enable Low to Output Transition tOE Output Enable Low to Output Valid 35 40 ns Chip Enable High to Output Hi-Z 30 35 ns 35 ns tGHQZ (1) tDF Output Enable High to Output Hi-Z tAXQX tOH Address Transition to Output Transition 0 ns tCE (1) 0 150 120 0 0 30 0 ns 150 0 ns ns ns Note: 1. Sampled only, not 100% tested 11/21 12/21 DQ0-DQ7 W G E A0-A17 VPP COMMAND ERASE SET-UP tDVWH tWLWH tGHWL tELWL tVPHEL COMMAND ERASE SET-UP (REPEAT OF 1st CYCLE) tWHDX tWHWL tWHEH tWHWH3 tWLAX COMMAND tWHEH ERASE VERIFY SET-UP tDVWH tWLWH tWHWH2 tELWL tAVWL VALID ERASE OPERATION tWHDX tWHGL tELQV VERIFY READ DATA OUT tGLQV AI00645 tGHQZ tEHQZ M28F201 Figure 8. Erase Set-up and Erase Verify Commands Waveforms, W Controlled DQ0-DQ7 E G W A0-A17 VPP tGHEL tWLEL COMMAND ERASE SET-UP tDVEH tELEH tVPHWL COMMAND ERASE SET-UP (REPEAT OF 1st CYCLE) tEHDX tEHEL tEHWH tEHEH3 tELAX COMMAND tEHWH ERASE VERIFY SET-UP tDVEH tELEH tEHEH2 tWLEL tAVEL VALID ERASE OPERATION tEHDX tELQV tEHGL tGLQV VERIFY READ DATA OUT AI01328 tEHQZ tGHQZ M28F201 Figure 9. Erase Set-up and Erase Verify Commands Waveforms, E Controlled 13/21 14/21 DQ0-DQ7 W G E A0-A17 VPP tWHDX tWHWL tELWL DATA IN tWLWH tWLAX ADDRESS AND DATA LATCH tDVWH tWHEH VALID tWHWH3 tAVWL COMMAND tWHEH PROGRAM SET-UP tDVWH tWLWH tGHWL tELWL tVPHEL tWHDX tWHWH1 tELWL tWHGL tELQV tWHDX tWLWH COMMAND PROGRAM VERIFY SET-UP tDVWH tWHEH PROGRAM OPERATION VERIFY READ DATA OUT tGLQV AI00646 tGHQZ tEHQZ M28F201 Figure 10. Program Set-up and Program Verify Commands Waveforms - W Controlled DQ0-DQ7 E G W A0-A17 VPP tAVEL tEHDX DATA IN tELEH tELAX ADDRESS AND DATA LATCH tDVEH tEHWH VALID tEHEH3 tEHEL tWLEL COMMAND tEHWH PROGRAM SET-UP tDVEH tELEH tGHEL tWLEL tVPHEL tEHDX tEHEH1 tWLEL tELEH COMMAND PROGRAM VERIFY SET-UP tDVEH tEHWH PROGRAM OPERATION tEHDX tELQV tEHGL VERIFY READ DATA OUT tGLQV AI00648 tEHQZ tGHQZ M28F201 Figure 11. Program Set-up and Program Verify Commands Waveforms - E Controlled 15/21 M28F201 Figure 12. Erasing Flowchart Figure 13. Programming Flowchart VPP = 12V VPP = 12V PROGRAM ALL BYTES TO 00h n =0 n=0, Addr=00000h NO YES VPP < 6.5V FAIL ERASE SET-UP PROGRAM SET-UP Latch Addr, Data Wait 10ms Wait 10µs NO ERASE VERIFY Latch Addr. ++n = 1000 YES PROGRAM VERIFY ++n = 25 Wait 6µs Wait 6µs VPP < 6.5V FAIL READ DATA OUTPUT READ DATA OUTPUT NO NO Data OK Addr++ Data OK Addr++ YES YES Last Addr Last Addr NO NO YES YES READ COMMAND READ COMMAND VPP < 6.5V, PASS VPP < 6.5V, PASS PRESTO F ERASE ALGORITHM The PRESTO F Erase Algorithm guarantees that the device will be erased in a reliable way. The algorithm first programs all bytes to 00h in order to ensure uniform erasure. The programming follows the PRESTO F Programming Algorithm. Erase is set-up by writing 20h to the command register, the erasure is started by repeating this write cycle. Erase Verify is set-up by writing A0h to the command register together with the address of the byte to be verified. The subsequentread cycle reads the data which is compared to FFh. Erase Verify begins at address 0000h and continues to the last address or until the comparison of the data to FFh fails. If this occurs, the address of the last byte checked is stored and a new Erase operation performed. Erase Verify then continues from the address of the stored location. 16/21 AI00677 AI00649 PRESTO F PROGRAM ALGORITHM The PRESTO F Programming Algorithm applies a series of 10µs programming pulses to a byte until a correct verify occurs. Up to 25 programming operations are allowed for one byte. Program is set-up by writing 40h to the command register, the programming is started after the next write cycle which also latches the address and data to be programmed. Program Verify is set-up by writing C0h to the command register, followed by a read cycle and a compare of the data read to the data expected. During Program and Program Verify operations a MARGIN MODE circuit is activated to guaranteethat the cell is programmed with a safety margin. M28F201 ORDERING INFORMATION SCHEME Example: M28F201 -70 X N 1 TR Option Operating Voltage F R 5V TR Speed -70 70 ns -90 90 ns -120 120 ns -150 150 ns Power Supplies blank VCC ± 10% X VCC ± 5% Package Reverse Pinout Tape & Reel Packing Temperature Range K PLCC32 1 0 to 70 °C N TSOP32 8 x 20 mm 3 –40 to 125 °C 6 –40 to 85 °C Devices are shipped from the factory with the memory content erased (to FFh). For a list of available options (Speed, Package, etc...) or for further information on any aspect of this device, please contact the SGS-THOMSON Sales Office nearest to you. 17/21 M28F201 PLCC32 - 32 lead Plastic Leaded Chip Carrier, rectangular mm Symb Typ inches Min Max A 2.54 A1 Min Max 3.56 0.100 0.140 1.52 2.41 0.060 0.095 B 0.33 0.53 0.013 0.021 B1 0.66 0.81 0.026 0.032 D 12.32 12.57 0.485 0.495 D1 11.35 11.56 0.447 0.455 D2 9.91 10.92 0.390 0.430 E 14.86 15.11 0.585 0.595 E1 13.89 14.10 0.547 0.555 E2 12.45 13.46 0.490 0.530 – – – – e 1.27 Typ 0.050 N 32 32 Nd 7 7 Ne 9 9 CP 0.10 0.004 PLCC32 D D1 A1 1 N B1 E1 E Ne e D2/E2 B A Nd PLCC Drawing is not to scale. 18/21 CP M28F201 TSOP32 Normal Pinout - 32 lead Plastic Thin Small Outline, 8 x 20mm mm Symb Typ inches Min Max A Typ Min 1.20 Max 0.047 A1 0.05 0.17 0.002 0.006 A2 0.95 1.50 0.037 0.059 B 0.15 0.27 0.006 0.011 C 0.10 0.21 0.004 0.008 D 19.80 20.20 0.780 0.795 D1 18.30 18.50 0.720 0.728 E 7.90 8.10 0.311 0.319 – – – – L 0.50 0.70 0.020 0.028 α 0° 5° 0° 5° N 32 e 0.50 0.020 32 CP 0.10 0.004 TSOP32 A2 1 N e E B N/2 D1 A CP D DIE C TSOP-a A1 α L Drawing is not to scale. 19/21 M28F201 TSOP32 Reverse Pinout - 32 lead Plastic Thin Small Outline, 8 x 20mm mm Symb Typ inches Min Max A Typ Min 1.20 0.047 A1 0.05 0.17 0.002 0.006 A2 0.95 1.50 0.037 0.059 B 0.15 0.27 0.006 0.011 C 0.10 0.21 0.004 0.008 D 19.80 20.20 0.780 0.795 D1 18.30 18.50 0.720 0.728 E 7.90 8.10 0.311 0.319 – – – – L 0.50 0.70 0.020 0.028 α 0° 5° 0° 5° N 32 e 0.50 0.020 32 CP 0.10 0.004 TSOP32 A2 1 N e E B N/2 D1 A CP D DIE C TSOP-b Drawing is not to scale. 20/21 Max A1 α L M28F201 Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. 1997 SGS-THOMSON Microelectronics - All Rights Reserved SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. 21/21