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M93C86, M93C76, M93C66 M93C56, M93C46, M93C06
16K/8K/4K/2K/1K/256 (x8/x16) Serial Microwire Bus EEPROM
INDUSTRY STANDARD MICROWIRE BUS 1 MILLION ERASE/WRITE CYCLES, with 40 YEARS DATA RETENTION DUAL ORGANIZATION: by WORD (x16) or by BYTE (x8) BYTE/WORD and ENTIRE MEMORY PROGRAMMING INSTRUCTIONS SELF-TIMED PROGRAMMING CYCLE with AUTO-ERASE READY/BUSY SIGNAL DURING PROGRAMMING SINGLE SUPPLY VOLTAGE: - 4.5V to 5.5V for M93Cx6 version - 2.5V to 5.5V for M93Cx6-W version - 1.8V to 3.6V for M93Cx6-R version SEQUENTIAL READ OPERATION 5ms TYPICAL PROGRAMMING TIME ENHANCED ESD/LATCH-UP PERFORMANCES DESCRIPTION This M93C86/C76/C66/C56/C46/C06 specification covers a range of 16K/8K/4K/2K/1K/256 bit serial EEPROM products respectively. In this text, products are referred to as M93Cx6. The M93Cx6 is an Electrically Erasable Programmable Memory (EEPROM) fabricated with STMicroelectronics's High Endurance Single Polysilicon CMOS technology. The M93Cx6 memory is accessed through a serial input (D) and output (Q) using the MICROWIRE bus protocol. Table 1. Signal Names
S D Q C ORG VCC VSS February 1999 Chip Select Input Serial Data Input Serial Data Output Serial Clock Organisation Select Supply Voltage Ground
8 1
PSDIP8 (BN) 0.25mm Frame
8 1
SO8 (MN) 150mil Width
8 1
TSSOP8 (DW) 169mil Width
Figure 1. Logic Diagram
VCC
D C M93Cx6 S ORG
Q
VSS
AI01928
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
Figure 2A. DIP and SO Pin Connections Figure 2B. SO 90 Turn Pin Connections
M93Cx6 S C D Q 1 2 3 4 8 7 6 5
AI01929B
M93Cx6 VCC DU ORG VSS DU VCC S C 1 2 3 4 8 7 6 5
AI00900
ORG VSS Q D
Warning: DU = Don't Use
Warning: DU = Don't Use
Figure 2C. TSSOP Pin Connections
M93C06/46/56/66 - W M93C06/46/56/66 - R S C D Q 1 2 3 4 8 7 6 5
AI02789
VCC DU ORG VSS
Warning: DU = Don't Use
DESCRIPTION (cont'd) The M93Cx6 specified at 5V10%, the M93Cx6-W specified at 2.5V to 5.5V and the M93Cx6-R specified at 1.8V to 3.6V. The M93Cx6 memory array organization may be divided into either bytes (x8) or words (x16) which may be selected by a signal applied on the ORG input. The M93C86/C76/C66/C56/C46/C06 is divided into either 2048/1024/512/256/128/32 x8 bit bytes or 1024/512/256/128/64/16 x16 bit words respectively. These memory devices are available in both PSDIP8, SO8 and TSSOP8 packages. The M93Cx6 memory is accessed by a set of instructions which includes Read a Byte/Word, Write a Byte/Word, Erase a Byte/Word, Erase All and Write All. A Read instruction loads the address of the first byte/word to be read into an internal address pointer. The data contained at this address is then clocked out serially. The address pointer is automatically incremented after the data is output and, if the Chip Select input (S) is held High, the M93Cx6 can output a sequential stream of data bytes/words. In this way, the memory can be read
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as a data stream from 8 up to 16,384 bits long (for the M93C86 only), or continuously as the address counter automatically rolls over to '00' when the highest address is reached. Programming is internally self-timed (the external clock signal on C input may be disconnected or left running after the start of a Write cycle) and does not require an erase cycle prior to the Write instruction. The Write instruction writes 8 or 16 bits at one time into one of the byte or word locations of the M93Cx6. After the start of the programming cycle, a Busy/Ready signal is available on the Data output (Q) when Chip Select (S) is driven High. An internal feature of the M93Cx6 provides Poweron Data Protection by inhibiting any operation when the Supply is too low for reliable operation. The design of the M93Cx6 and the High Endurance CMOS technology used for its fabrication give an Erase/Write cycle Endurance of 1,000,000 cycles and a data retention of 40 years. The DU (Don't Use) pin does not affect the function of the memory. It is reserved for use by STMicroelectronics during test sequences. The pin may be left unconnected or may be connected to VCC or VSS. Direct connection of DU to VSS is recommended for the lowest standby power consumption. MEMORY ORGANIZATION The M93Cx6 is organised in either bytes (x8) or words (x16). If the ORG input is left unconnected (or connected to VCC) the x16 organization is selected; when ORG is connected to Ground (VSS) the x8 organization is selected. When the M93Cx6 is in standby mode, the ORG input should be set to either VSS or VCC in order to achieve minimum power consumption. Any voltage between VSS and VCC applied to the ORG input pin may increase the standby current value.
M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
Table 2. Absolute Maximum Ratings (1)
Symbol TA TSTG TLEAD VIO VCC VESD Parameter Ambient Operating Temperature Storage Temperature Lead Temperature, Soldering (SO8 package) (PSDIP8 package) 40 sec 10 sec Value -40 to 125 -65 to 150 215 260 -0.3 to VCC +0.5 -0.3 to 6.5
(2)
Unit C C C V V V V
Input or Output Voltages (Q = VOH or Hi-Z) Supply Voltage Electrostatic Discharge Voltage (Human Body model) Electrostatic Discharge Voltage (Machine model)
(3)
4000 500
Notes: 1. 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 STMicroelectronics SURE Program and other relevant quality documents. 2. MIL-STD-883C, 3015.7 (100pF, 1500 ). 3. EIAJ IC-121 (Condition C) (200pF, 0 ).
Table 3. AC Measurement Conditions
Input Rise and Fall Times Input Pulse Voltages (M93Cxx) Input Pulse Voltages (M93Cxx-W, M93Cxx-R) Input Timing Reference Voltages (M93Cxx) Output Timing Reference Voltages (M93Cxx) Input and Output Timing Reference Voltages (M93Cxx-W, M93Cxx-R) Output Load
Note that Output Hi-Z is defined as the point where data is no longer driven.
50ns 0.4V to 2.4V 0.2VCC to 0.8VCC 1.0V to 2.0V 0.8V to 2.0V 0.3VCC to 0.7VCC CL = 100pF
POWER-ON DATA PROTECTION In order to prevent data corruption and inadvertent write operations during power-up, a Power On Reset (POR) circuit resets all internal programming circuitry and sets the device in the Write Disable mode. - At Power-up and Power-down, the device must NOT be selected (that is, the S input must be driven low) until the supply voltage reaches the operating value VCC specified in the AC and DC tables. - When VCC reaches its functional value, the device is properly reset (in the Write Disable mode) and is ready to decode and execute an incoming instruction. For the M93Cx6 specified at 5V, the POR threshold voltage is around 3V. For all the other M93Cx6 specified at low VCC (with -W and -R VCC range options), the POR threshold voltage is around 1.5V.
Figure 3. AC Testing Input Output Waveforms
M93CXX 2.4V 2V 1V 0.4V INPUT OUTPUT 2.0V 0.8V
M93CXX-W & M93CXX-R 0.8VCC 0.7VCC 0.3VCC
AI02553
0.2VCC
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
Table 4. Capacitance (1) (TA = 25 C, f = 1 MHz )
Symbol CIN COUT Parameter Input Capacitance Output Capacitance Test Condition VIN = 0V VOUT = 0V Min Max 5 5 Unit pF pF
Note: 1. Sampled only, not 100% tested.
Table 5A. DC Characteristics for M93CXX (TA = 0 to 70C or -40 to 85C; VCC = 4.5V to 5.5V)
Symbol ILI ILO ICC ICC1 VIL VIH VOL VOH Parameter Input Leakage Current Output Leakage Current Supply Current Supply Current (Standby) Input Low Voltage (D, C, S) Input High Voltage (D, C, S) Output Low Voltage (Q) Output High Voltage (Q) Test Condition 0V VIN VCC 0V VOUT VCC, Q in Hi-Z VCC = 5V, S = VIH, f = 1 MHz VCC = 5V, S = VSS, C = VSS, ORG = VSS or VCC VCC = 5V 10% VCC = 5V 10% VCC = 5V, IOL = 2.1mA VCC = 5V, IOH = -400A 2.4 -0.3 2 Min Max 2.5 2.5 1.5 50 0.8 VCC + 1 0.4 Unit A A mA A V V V V
Table 5B. DC Characteristics for M93CXX (TA = -40 to 125C; VCC = 4.5V to 5.5V)
Symbol ILI ILO ICC ICC1 VIL VIH VOL VOH Parameter Input Leakage Current Output Leakage Current Supply Current Supply Current (Standby) Input Low Voltage (D, C, S) Input High Voltage (D, C, S) Output Low Voltage (Q) Output High Voltage (Q) Test Condition 0V VIN VCC 0V VOUT VCC, Q in Hi-Z VCC = 5V, S = VIH, f = 1 MHz VCC = 5V, S = VSS, C = VSS, ORG = VSS or VCC VCC = 5V 10% VCC = 5V 10% VCC = 5V, IOL = 2.1mA VCC = 5V, IOH = -400A 2.4 -0.3 2 Min Max 2.5 2.5 1.5 50 0.8 VCC + 1 0.4 Unit A A mA A V V V V
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
Table 5C. DC Characteristics for M93CXX-W (TA = 0 to 70C or -40 to 85C; VCC = 2.5V to 5.5V)
Symbol ILI ILO ICC Parameter Input Leakage Current Output Leakage Current Supply Current (CMOS Inputs) Test Condition 0V VIN VCC 0V VOUT VCC, Q in Hi-Z VCC = 5V, S = VIH, f = 1 MHz VCC = 2.5V, S = VIH, f = 1 MHz ICC1 VIL VIH VOL Supply Current (Standby) Input Low Voltage (D, C, S) Input High Voltage (D, C, S) Output Low Voltage (Q) VCC = 5V, IOL = 2.1mA VCC = 2.5V, IOL = 100A VOH Output High Voltage (Q) VCC = 5V, IOH = -400A VCC = 2.5V, IOH = -100A 2.4 VCC - 0.2 VCC = 2.5V, S = VSS, C = VSS, ORG = VSS or VCC -0.3 0.7 VCC Min Max 2.5 2.5 1.5 1 10 0.2 VCC VCC + 1 0.4 0.2 Unit A A mA mA A V V V V V V
Table 5D. DC Characteristics for M93CXX-R (1) (TA = 0 to 70C or -20 to 85C; VCC = 1.8V to 3.6V)
Symbol ILI ILO ICC Parameter Input Leakage Current Output Leakage Current Supply Current (CMOS Inputs) Test Condition 0V VIN VCC 0V VOUT VCC, Q in Hi-Z VCC = 3.6V, S = VIH, f = 1 MHz VCC = 1.8V, S = VIH, f = 1 MHz ICC1 VIL VIH VOL VOH Supply Current (Standby) Input Low Voltage (D, C, S) Input High Voltage (D, C, S) Output Low Voltage (Q) Output High Voltage (Q) VCC = 1.8V, IOL = 100A VCC = 1.8V, IOH = -100A VCC - 0.2 VCC = 1.8V, S = VSS, C = VSS, ORG = VSS or VCC -0.3 0.8 VCC Min Max 2.5 2.5 1.5 1 5 0.2 VCC VCC + 1 0.2 Unit A A mA mA A V V V V
Note: 1. This is preliminary data.
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
Table 6A. AC Characteristics
M93C86/76/66/56/46/06 Symbol Alt Parameter VCC = 4.5V to 5.5V, TA = 0 to 70C, TA = -40 to 85C Min Chip Select Set-up Time M93C06, M39C46, M93C56, M93C66 Chip Select Set-up time M93C76, M93C86 tCLSH tDVCH tCHDX tCHQL tCHQV tCLSL tSLCH tSLSH
(1)
VCC = 4.5V to 5.5V, TA = -40 to 125C Min 50 100 100 100 100 Max
Unit
Max
50 100 100 100 100 400 400 0 250 250 400 200 250 250 10 0 1
ns ns ns ns ns 400 400 ns ns ns ns ns 400 200 ns ns ns ns 10 ms MHz
tSHCH
tCSS
tSKS tDIS tDIH tPD0 tPD1 tCSH
Clock Set-up Time (relative to S) Data In Set-up Time Data In Hold Time Delay to Output Low Delay to Output Valid Chip Select Hold Time Chip Select Low to Clock High
0 250 250
tCS tSV tDF tSKH tSKL tWP fSK
Chip Select Low to Chip Select High Chip Select to Ready/Busy Status Chip Select Low to Output Hi-Z Clock High Time Clock Low Time Erase/Write Cycle time Clock Frequency
tSHQV tSLQZ tCHCL
(2)
250 250
tCLCH (2) tW fC
0
1
Notes: 1. Chip Select must be brought low for a minimum of tSLSH between consecutive instruction cycles. 2. The Clock frequency specification calls for a minimum clock period of 1/fC, therefore the sum of the timings tCHCL + tCLCH must be greater or equal to 1/fC.
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
Table 6B. AC Characteristics
M93C86/76/66/56/46/06 Symbol Alt Parameter VCC = 2.5V to 5.5V, TA = 0 to 70C, TA = -40 to 85C Min tSHCH tCLSH tDVCH tCHDX tCHQL tCHQV tCLSL tSLCH tSLSH
(1)
VCC = 1.8V to 3.6V,(3) TA = 0 to 70C, TA = -20 to 85C Min 200 100 100 200 Max
Unit
Max
tCSS tSKS tDIS tDIH tPD0 tPD1 tCSH
Chip Select Set-up Time Clock Set-up Time (relative to S) Data In Set-up Time Data In Hold Time Delay to Output Low Delay to Output Valid Chip Select Hold Time Chip Select Low to Clock High
100 100 100 100 400 400 0 250 1000 400 200 350 250 10 0 1
ns ns ns ns 700 700 ns ns ns ns ns 700 200 ns ns ns ns 10 ms MHz
0 250 1000
tCS tSV tDF tSKH tSKL tWP fSK
Chip Select Low to Chip Select High Chip Select to Ready/Busy Status Chip Select Low to Output Hi-Z Clock High Time Clock Low Time Erase/Write Cycle time Clock Frequency
tSHQV tSLQZ tCHCL tCLCH tW fC
(2) (2)
800 800
0
0.5
Notes: 1. Chip Select must be brought low for a minimum of tSLSH between consecutive instruction cycles. 2. The Clock frequency specification calls for a minimum clock period of 1/fC, therefore the sum of the timings tCHCL + tCLCH must be greater or equal to 1/fC. 3. This is preliminary data.
Figure 4. Synchronous Timing, Start and Op-Code Input
tCLSH C tSHCH S tDVCH D START OP CODE
tCHCL
tCLCH
tCHDX OP CODE
START
OP CODE INPUT
AI01428
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
Figure 5. Synchronous Timing, Read or Write
C tCLSL S tDVCH D An tCHQL Q15/Q7 tCHDX A0 tSLQZ Q0 tCHQV tSLSH
Hi-Z Q
ADDRESS INPUT
DATA OUTPUT
AI00820C
tSLCH C tCLSL S tDVCH D An tCHDX A0/D0 tSHQV Hi-Z Q BUSY tW ADDRESS/DATA INPUT WRITE CYCLE
AI01429
tSLSH
tSLQZ READY
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
INSTRUCTIONS The M93C86/C76/C66/C56/C46/C06 have seven instructions, as shown in Table 7. Each instruction is preceded by the rising edge of the signal applied on the S input (assuming that the clock C is low). After the device is selected, the internal logic waits for the start bit, which defines the beginning of the instruction bit stream. The start bit is the first '1' read on the D input during the rising edge of the clock C. Following the start bit, the op-codes of the instructions are made up of the 2 following bits. Note that some instructions use only these first two bits, others use also the first two bits of the address to define the op-code. The op-code is then followed by the address of the byte/word to be accessed. For the M93C06 and M93C46, the address is made up of 6 bits for the x16 organization or 7 bits for the x8 organization (see Table 7A). For the M93C56 and M93C66, the address is made up of 8 bits for the x16 organization or 9 bits for the x8 organization (see Table 7B). For the M93C76 and M93C86, the address is made up of 10 bits for the x16 organization or 11 bits for the x8 organization (see Table 7C). The M93Cx6 is fabricated in CMOS technology and is therefore able to run from 0Hz (static input signals) up to the maximum ratings (specified in Table 6). Read The Read instruction (READ) outputs serial data on the Data Output (Q). When a READ instruction is received, the instruction and address are decoded and the data from the memory is transferred into an output shift register. A dummy '0' bit is output first followed by the 8 bit byte or the 16 bit word with the MSB first. Output data changes are triggered by the Low to High transition of the Clock (C). The M93Cx6 will automatically increment the address and will clock out the next byte/word as long as the Chip Select input (S) is held High. In this case the dummy '0' bit is NOT output between bytes/words and a continuous stream of data can be read. Erase/Write Enable and Disable The Erase/Write Enable instruction (EWEN) authorizes the following Erase/Write instructions to be executed. The Erase/Write Disable instruction (EWDS) disables the execution of the following Erase/Write instructions and the internal programming cycle cannot run. When power is first applied, the M93Cx6 is in Erase/Write Disable mode and all Erase/Write instructions are inhibited. When the EWEN instruction is executed, Erase/Write instructions remain enabled until an Erase/Write Disable instruction (EWDS) is executed or VCC falls below the power-on reset Threshold voltage. To protect the memory contents from accidental corruption, it is advisable to issue the EWDS instruction after every write cycle. The READ instruction is not affected by the EWEN or EWDS instructions. Erase The Erase instruction (ERASE) programs the addressed memory byte or word bits to '1'. Once the address is correctly decoded, the falling edge of the Chip Select input (S) starts a self-timed erase cycle. If the M93Cx6 is still performing the erase cycle, the Busy signal (Q = 0) will be returned if S is driven high after the tSLSH delay, and the M93Cx6 will ignore any data on the bus. When the erase cycle is completed, the Ready signal (Q = 1) will indicate (if S is driven high) that the M93Cx6 is ready to receive a new instruction. Write The Write instruction (WRITE) is composed of the Op-Code followed by the address and the 8 or 16 data bits to be written. Data input is sampled on the Low to High transition of the clock. After the last data bit has been sampled, Chip Select (S) must be brought Low before the next rising edge of the clock (C) in order to start the self-timed programming cycle. This is important as, if S is brought low before or after this specific frame window, the addressed location will not be programmed. If the M93Cx6 is still performing the write cycle, the Busy signal (Q = 0) will be returned if S is driven high after the tSLSH delay, and the M93Cx6 will ignore any data on the bus. When the write cycle is completed, the Ready signal (Q = 1) will indicate (if S is driven high) that the M93Cx6 is ready to receive a new instruction. Programming is internally self-timed (the external clock signal on C input may be disconnected or left running after the start of a Write cycle). The Write instruction includes an automatic Erase cycle before writing the data, it is therefore unnecessary to execute an Erase instruction before a Write instruction execution. Erase All The Erase All instruction (ERAL) erases the whole memory (all memory bits are set to '1'). A dummy address is input during the instruction transfer and the erase is made in the same way as the ERASE instruction above. If the M93Cx6 is still performing the erase cycle, the Busy signal (Q = 0) will be returned if S is driven high after the tSLSH delay, and the M93Cx6 will ignore any data on the bus. When the erase cycle is completed, the Ready signal (Q = 1) will indicate (if S is driven high) that the M93Cx6 is ready to receive a new instruction.
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
Table 7A. Instruction Set for the M93C06 and M93C46
Instr. Description Read Data from Memory Write Data to Memory Erase/Write Enable Erase/Write Disable Erase Byte or Word Erase All Memory Write All Memory with same Data Start bit 1 1 1 1 1 1 1 OpCode 10 01 00 00 11 00 00 x8 Org Address (ORG = 0) (1, 2) A6-A0 A6-A0 11X XXXX 00X XXXX A6-A0 10X XXXX 01X XXXX D7-D0 Data Req. Clock Cycles x16 Org Address (ORG = 1) (1, 3) A5-A0 18 10 10 10 10 18 A5-A0 11 XXXX 00 XXXX A5-A0 10 XXXX 01 XXXX D15-D0 Data Req. Clock Cycles
READ WRITE EWEN EWDS ERASE ERAL WRAL
Q7-Q0 D7-D0
Q15-Q0 D15-D0 25 9 9 9 9 25
Notes: 1. X = don't care bit. 2. Address bits A6 and A5 are not decoded by the M93C06. 3. Address bits A5 and A4 are not decoded by the M93C06.
Table 7B. Instruction Set for the M93C56 and M93C66
Instr. Description Read Data from Memory Write Data to Memory Erase/Write Enable Erase/Write Disable Erase Byte or Word Erase All Memory Write All Memory with same Data Start bit 1 1 1 1 1 1 1 OpCode 10 01 00 00 11 00 00 x8 Org Address (ORG = 0) (1, 2) A8-A0 A8-A0 1 1XXX XXXX 0 0XXX XXXX A8-A0 1 0XXX XXXX 0 1XXX XXXX D7-D0 Data Req. Clock Cycles x16 Org Address (ORG = 1) (1, 3) A7-A0 20 12 12 12 12 20 A7-A0 11XX XXXX 00XX XXXX A7-A0 10XX XXXX 01XX XXXX D15-D0 Data Req. Clock Cycles
READ WRITE EWEN EWDS ERASE ERAL WRAL
Q7-Q0 D7-D0
Q15-Q0 D15-D0 27 11 11 11 11 27
Notes: 1. X = don't care bit. 2. Address bit A8 is not decoded by the M93C56. 3. Address bit A7 is not decoded by the M93C56.
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
Table 7C. Instruction Set for the M93C76 and M93C86
Instr. Description Read Data from Memory Write Data to Memory Erase/Write Enable Erase/Write Disable Erase Byte or Word Erase All Memory Write All Memory with same Data Start bit 1 1 1 1 1 1 1 OpCode 10 01 00 00 11 00 00 x8 Org Address (ORG = 0) (1, 2) A10-A0 A10-A0 11X XXXX XXXX 00X XXXX XXXX A10-A0 10X XXXX XXXX 01X XXXX XXXX D7-D0 Data Req. Clock Cycles x16 Org Address (ORG = 1) (1, 3) A9-A0 22 14 14 14 14 22 A9-A0 11 XXXX XXXX 00 XXXX XXXX A9-A0 10 XXXX XXXX 01 XXXX XXXX D15-D0 Data Req. Clock Cycles
READ WRITE EWEN EWDS ERASE ERAL WRAL
Q7-Q0 D7-D0
Q15-Q0 D15-D0 29 13 13 13 13 29
Notes: 1. X = don't care bit. 2. Address bit A10 is not decoded by the M93C76. 3. Address bit A9 is not decoded by the M93C76.
Write All The Write All instruction (WRAL) writes the Data Input byte or word into all the addresses of the memory device. As for the Erase All instruction, a dummy address is input during the instruction transfer. If the M93Cx6 is still performing the write cycle, the Busy signal (Q = 0) will be returned if S is driven high after the tSLSH delay, and the M93Cx6 will ignore any data on the bus. When the write cycle is completed, the Ready signal (Q = 1) will indicate (if S is driven high) that the M93Cx6 is ready to receive a new instruction. READY/BUSY Status During every programming cycle (after a WRITE, ERASE, WRAL or ERAL instruction) the Data Out-
put (Q) indicates the Ready/Busy status of the memory when the Chip Select is driven High. Once the M93Cx6 is Ready, the Data Output is set to '1' until a new start bit is decoded or the Chip Select is brought Low. COMMON I/O OPERATION The Data Output (Q) and Data Input (D) signals can be connected together, through a current limiting resistor, to form a common, one wire data bus. Some precautions must be taken when operating the memory with this connection, mostly to prevent a short circuit between the last entered address bit (A0) and the first data bit output by Q. The reader should refer to the STMicroelectronics application note AN394 "MICROWIRE EEPROM Common I/O Operation".
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
Figure 6. READ, WRITE, EWEN, EWDS Sequences
READ
S
D
1 1 0 An
A0
Q ADDR OP CODE
Qn DATA OUT
Q0
WRITE
S CHECK STATUS D 1 0 1 An A0 Dn D0
Q ADDR OP CODE DATA IN BUSY READY
ERASE WRITE ENABLE
S
ERASE WRITE DISABLE 1 0 0 1 1 Xn X0
S
D
D
1 0 0 0 0 Xn X0
OP CODE
OP CODE
AI00878C
Note: An, Xn, Qn, Dn: Refer to Table 6a for the M93C06 and M93C46; to Table 6b for the M93C56 and M93C66; to Table 6c for the M93C76 and M93C86.
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
Figure 7. ERASE, ERAL Sequences
ERASE
S CHECK STATUS D 1 1 1 An A0
Q ADDR OP CODE BUSY READY
ERASE ALL
S CHECK STATUS D 1 0 0 1 0 Xn X0
Q ADDR OP CODE
AI00879B
BUSY
READY
Note: An, Xn: Refer to Table 7a for the M93C06 and M93C46; to Table 7b for the M93C56 and M93C66; to Table 7c for the M93C76 and M93C86.
Figure 8. WRAL Sequence
WRITE ALL
S CHECK STATUS D 1 0 0 0 1 Xn X0 Dn D0
Q ADDR OP CODE
AI00880C
DATA IN
BUSY
READY
Note: Xn, Dn: Refer to Table 7a for the M93C06 and M93C46; to Table 7b for the M93C56 and M93C66; to Table 7c for the M93C76 and M93C86.
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
Figure 9. WRITE Sequence with One Clock Glitch
S
C
D
An START "0" WRITE "1"
An-1 Glitch
An-2 D0
ADDRESS AND DATA ARE SHIFTED BY ONE BIT
AI01395
CLOCK PULSE COUNTER The M93Cx6 offers a functional security block which filters glitches on the clock input (C), the clock pulse counter. In a normal environment, the M93Cx6 expects to receive the exact number of data bits on the D input (start bit, Op-Code, Address, Data); that is the exact amount of clock pulses on the C input. In a noisy environment, the number of pulses received (on the clock input C) may be greater than the clock pulses delivered by the Master (Microcontroller) driving the M93Cx6. In such a case, a part of the instruction can be delayed by one or more bits (see Figure 9), and may induce an erroneous write of data at an invalid address. The M93Cx6 has an on-chip counter which counts the clock pulses from the Start bit until the falling edge of the Chip Select signal. For the WRITE instructions with a M93C56 (or M93C66), the number of clock pulses incoming to the counter must be exactly 20 (with the organisation x8) from the Start bit to the falling edge of Chip
Select signal (1 Start bit + 2 Op-code bit + 9 Address bit + 8 Data bit = 20): if so, the M93C56 (or M93C66) executes the WRITE instruction; if the number of clock pulses is not equal to 20, the instruction will not be executed (and data will not be corrupted). In the same way, when the organisation x16 is selected with the M93C56 (or M93C66), the number of clock pulses incoming to the counter must be exactly 27 (1 Start bit + 2 Op-code bit + 8 Address bit + 16 Data bit = 27) from the Start bit to the falling edge of Chip Select signal: if so, the M93C56 (or M93C66) executes the WRITE instruction; if the number of clock pulses is not equal to 27, the instruction will not be executed (and data will not be corrupted). The clock pulse counter is active on the WRITE, ERASE, ERAL and WRALL instructions. In order to determine the exact number of clock pulses needed for all the M93Cx6 family on ERASE and WRITE instructions, refer to the Tables 7A, 7B and 7C, in the column: Requested Clock Cycles.
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
ORDERING INFORMATION SCHEME Example: M93C86 - T W MN 6 T
Memory Density 86 66 56 46 06 16 Kbit 4 Kbit 2 Kbit 1 Kbit 256 bit T 76 (1) 8 Kbit
Option Tape & Reel Packing
Turned Mode T
(5)
Operating Voltage blank 4.5V to 5.5V W R
(4)
Package BN PSDIP8 0.25mm Frame MN SO8 150mil Width DW TSSOP8 (6) 169mil Width
Temperature Range 1 (2) 0 to 70 C 5 6 3
(3)
90 Turned die
blank Standard
2.5V to 5.5V 1.8V to 3.6V
-20 to 85 C -40 to 85 C -40 to 125 C
Notes: 1. This is preliminary information on a new product now in development. Details are subject to change without notice. 2. Temperature range on request only. 3. Produced with High Reliability Certified Flow (HRCF), in VCC range 4.5V to 5.5V at 1MHz only. 4. -R version (1.8V to 3.6V) are only available in temperature ranges 5 or 1. 5. Turned die option is not available for all devices. Please contact the STMicroelectronics Sales Office nearest to you. 6. TSSOP8 package available for M93C06, 46, 56, 66 low voltage (-W and -R) only.
Devices are shipped from the factory with the memory content set at all "1's" (FFFFh for x16, FFh for x8). For a list of available options (Operating Voltage, Package, etc...) or for further information on any aspect of this device, please contact the STMicroelectronics Sales Office nearest to you.
15/19
M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
PSDIP8 - 8 pin Plastic Skinny DIP, 0.25mm lead frame
mm Typ A A1 A2 B B1 C D E E1 e1 eA eB L N 3.00 8 2.54 7.62 Min 3.90 0.49 3.30 0.36 1.15 0.20 9.20 - 6.00 - 7.80 Max 5.90 - 5.30 0.56 1.65 0.36 9.90 - 6.70 - - 10.00 3.80 0.118 8 0.100 0.300 Typ inches Min 0.154 0.019 0.130 0.014 0.045 0.008 0.362 - 0.236 - 0.307 Max 0.232 - 0.209 0.022 0.065 0.014 0.390 - 0.264 - - 0.394 0.150
Symb
A2 A1 B B1 D
N
A L eA eB C
e1
E1
1
E
PSDIP-a
Drawing is not to scale
16/19
M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
SO8 - 8 lead Plastic Small Outline, 150 mils body width
mm Typ A A1 B C D E e H h L N CP 1.27 Min 1.35 0.10 0.33 0.19 4.80 3.80 - 5.80 0.25 0.40 0 8 0.10 Max 1.75 0.25 0.51 0.25 5.00 4.00 - 6.20 0.50 0.90 8 0.050 Typ inches Min 0.053 0.004 0.013 0.007 0.189 0.150 - 0.228 0.010 0.016 0 8 0.004 Max 0.069 0.010 0.020 0.010 0.197 0.157 - 0.244 0.020 0.035 8
Symb
h x 45 A C B e D CP
N
E
1
H A1 L
SO-a
Drawing is not to scale
17/19
M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
TSSOP8 - 8 lead Plastic Shrink Small Outline, 169 mils body width
mm Typ A A1 A2 B C D E E1 e L N CP 0.65 0.05 0.85 0.19 0.09 2.90 6.25 4.30 - 0.50 0 8 0.08 Min Max 1.10 0.15 0.95 0.30 0.20 3.10 6.50 4.50 - 0.70 8 0.026 0.002 0.033 0.007 0.004 0.114 0.246 0.169 - 0.020 0 8 0.003 Typ inches Min Max 0.043 0.006 0.037 0.012 0.008 0.122 0.256 0.177 - 0.028 8
Symb
D
N
DIE
C
E1 E
1
N/2
A1
A A2
L
CP
Drawing is not to scale
B
e TSSOP
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M93C86, M93C76, M93C66, M93C56, M93C46, M93C06
Information furnished is believed to be accurate and reliable. However, STMicroelectronics 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 STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a registered trademark of STMicroelectronics (c) 1999 STMicroelectronics - All Rights Reserved (R) MICROWIRE is a registered trademark of National Semiconductor Corp. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - France - Germany - Italy - Japan - Korea - Malaysia - Malta - Mexico - Morocco - The Netherlands Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A. http://www.st.com
19/19

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