MXIC MX26C1000BQC-90, MX26C1000BQC-12, MX26C1000BQI-15, MX26C1000BQI-90, MX26C1000BMC-15 Datasheet

...
0 (0)

ADVANCE INFORMATION

MX26C1000B

FEATURES

128Kx 8 organization

Single +5V power supply

+12V programming voltage

Fast access time:90/100/120/150 ns

Totally static operation

Completely TTL compatible

Operating current:30mA

Standby current: 100uA

GENERAL DESCRIPTION

1M-BIT[128Kx8]CMOS MULTIPLE-TIME-PROGRAMMABLE-EPROM

50 minimum erase/program cycles

Chip erase time: 1 (typ.)

Chip program time: 6.25 (typ.)

Typical fast programming cycle duration 10us/byte

Package type:

-32 pin plastic DIP

-32 pin PLCC

-32 pin TSOP

-32 pin SOP

The MX26C1000B is a 5V only, 1M-bit, MTP EPROMTM (Multiple Time Programmable Read Only Memory). It is organized as 128K words by 8 bits per word, operates from a single + 5 volt supply, has a static standby mode, and features fast single address location programming. All programming signals are TTL levels, requiring a single pulse. It is design to be programmed and erased by an

PIN CONFIGURATIONS

32 PDIP/SOP

VPP

1

 

32

 

VCC

A16

2

 

31

 

WE

 

A15

3

 

30

 

NC

A12

4

 

29

 

A14

A7

5

MX26C1000B

28

 

A13

A6

6

27

 

A8

A5

7

 

26

 

A9

A4

8

 

25

 

A11

A3

9

 

24

 

OE

 

A2

10

 

23

 

A10

A1

11

 

22

 

CE

 

A0

12

 

21

 

Q7

Q0

13

 

20

 

Q6

Q1

14

 

19

 

Q5

Q2

15

 

18

 

Q4

GND

16

 

17

 

Q3

32 TSOP

 

 

 

 

 

 

32

 

 

 

 

A11

 

1

 

 

OE

 

A9

 

2

 

31

 

A10

 

 

 

 

 

30

 

 

 

 

 

A8

 

3

 

 

CE

A13

 

4

 

29

 

Q7

A14

 

5

 

28

 

Q6

 

NC

 

6

 

27

 

Q5

 

 

 

 

7

 

26

 

Q4

 

WE

 

 

 

VCC

 

8

MX26C1000B

25

 

Q3

VPP

 

9

24

 

GND

A16

 

10

 

23

 

Q2

A15

 

11

 

22

 

Q1

A12

 

12

 

21

 

Q0

 

 

 

 

A7

 

13

 

20

 

A0

 

 

 

 

A6

 

14

 

19

 

A1

 

 

 

 

A5

 

15

 

18

 

A2

 

 

 

 

A4

 

16

 

17

 

A3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

P/N: PM0767

EPROM programmer or on-board. The MX26C1000B supports a intelligent fast programming algorithm which can result in programming time of less than one minute.

This MTP EPROMTM is packaged in industry standard 32 pin dual-in-line packages, 32 lead PLCC, 32 lead SOP and 32 lead TSOP packages.

32 PLCC

A12

A15

A16

VPP

VCC

 

WE

NC

 

 

 

 

 

 

 

 

4

 

 

1

32

 

 

30

A14

A7

5

 

 

 

 

 

 

29

A6

 

 

 

 

 

 

 

 

A13

A5

 

 

 

 

 

 

 

 

A8

A4

 

 

 

 

 

 

 

 

A9

A3

9

MX26C1000B

25

A11

 

 

 

 

 

 

 

 

 

 

 

A2

 

 

 

 

 

 

 

 

OE

A1

 

 

 

 

 

 

 

 

A10

 

 

 

 

 

 

 

 

 

 

 

 

A0

 

 

 

 

 

 

 

 

CE

Q0

13

 

 

17

 

 

 

21

Q7

 

14

 

 

 

 

 

20

 

 

 

 

Q1

Q2

GND

Q3

Q4

 

Q5

Q6

 

 

 

PIN DESCRIPTION

 

SYMBOL

PIN NAME

 

 

A0~A16

Address Input

 

 

 

 

 

 

 

 

 

Q0~Q7

Data Input/Output

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Chip Enable Input

CE

 

 

 

 

 

 

 

 

 

 

 

 

 

Output Enable Input

OE

 

 

 

 

 

 

 

 

 

 

Write Enable Input

 

WE

 

 

 

 

 

 

 

 

 

 

VPP

Program Supply Voltage

 

 

 

 

 

 

 

 

 

NC

No Internal Connection

 

 

 

 

 

 

 

 

 

VCC

Power Supply Pin (+5V)

 

 

 

 

 

 

 

 

 

GND

Ground Pin

 

 

 

 

 

 

 

 

 

 

 

 

 

 

REV. 0.6, OCT. 04, 2001

1

MXIC MX26C1000BQC-90, MX26C1000BQC-12, MX26C1000BQI-15, MX26C1000BQI-90, MX26C1000BMC-15 Datasheet

 

 

 

 

 

MX26C1000B

BLOCK DIAGRAM

 

 

 

 

 

 

 

 

 

 

WRITE

CE

CONTROL

PROGRAM/ERASE

STATE

INPUT

OE

HIGH VOLTAGE

MACHINE

 

WE

LOGIC

 

 

 

 

 

 

 

 

 

(WSM)

 

 

X-DECODER

MX26C1000B

STATE

 

 

 

 

ADDRESS

FLASH

REGISTER

 

LATCH

ARRAY

 

 

 

 

 

A0-A16

 

 

 

ARRAY

AND

 

 

 

 

-Y

 

SOURCE

 

 

 

 

 

DECODER

 

 

BUFFER

Y-PASS GATE

HV

 

COMMAND

 

 

 

 

 

 

 

 

 

 

DATA

 

 

 

 

 

 

 

 

 

 

DECODER

 

 

SENSE

PGM

 

 

 

AMPLIFIER

DATA

 

 

 

 

 

HV

 

 

 

 

 

 

COMMAND

 

 

 

 

 

DATA LATCH

 

 

 

 

PROGRAM

 

 

 

 

DATA LATCH

 

 

Q0-Q7

 

I/O BUFFER

 

P/N: PM0767

 

 

2

REV. 0.6, OCT. 04, 2001

 

 

 

 

MX26C1000B

FUNCTIONAL DESCRIPTION

When the MX26C1000B is delivered, or it is erased, the chip has all 1000K bits in the "ONE", or HIGH state. "ZEROs" are loaded into the MX26C1000B through the procedure of programming.

ERASE ALGORITHM

The MX26C1000B do not required preprogramming before an erase operation. The erase algorithm is a close loop flow to simultaneously erase all bits in the entire array. Erase operation starts with the initial erase operation. Erase verification begins at address 0000H by reading data FFH from each byte. If any byte fails to erase. the entire chip is reerased. to a maximum for 30 pulse counts of 100ms duration for each pulse. The maximum cumulative erase time is 3s. However. the device is usually erased in no more than 3 pulses. Erase verification time can be reduced by storing the address of the last byte that failed. Following the next erase operation verification may start at the stored address location. JEDEC standard erase algorithm can also be used. But erase time will increase by performing the unnecessary preprogramming.

PROGRAM ALGORITHM

The device is programmed byte by byte. A maximum of 25 pulses. each of 10us duration is allowed for each byte being programmed. The byte may be programmed sequentially or by random. After each program pulse, a program verify is done to determine if the byte has been successfully programmed.

Programming then proceeds to the next desired byte location. JEDEC standard program algorithms can be used.

RESET

The Reset command initializes the MTP EPROMTM device to the Read mode. In addition, it also provides the user with a safe method to abort any device operation (including program or erase). The Reset command must be written two consecutive times after the set-up Program command (40H). This will safely abort any previous operation and initialize the device to the Read mode.

Theset-upProgramcommand(40H)istheonlycommand that requires a two sequence reset cycle. The first Reset command is interpreted as program data. How ever, FFH dataisconsiderednulldataduringprogrammingoperations (memory cells are only programmed from logica "1" to "0". The second Reset command safely aborts the programming operation and resets the device to the Read mode.

This detailed information is for your reference. It may prove esier to always issue the Reset command two consecutive times. This eliminates the need to determine if you are in the set-up Program state or not.

SET-UP PROGRAM/PROGRAM

A three-step sequence of commands is required to perform a complete program operation: Set Up Program- Program-Program Verify. The device is bulk erased and byte by byte programming. The command 40H is written to the command register to initiate Set Up Program operation. Address and data to be programmed into the byte are provided on the second WE pulse. Addresses are latched on the falling edge of the WE pulse, data are latched on the rising edge of the WE pulse. Program operation begins on the rising edge of the second WE pulse, and terminate of the next rising edge of the WE pulse. Refer to AC Characteristics and Waveforms for specific timing parameters.

COMMAND REGISTER

When high voltage is applied to VPP the command register is enabled. Read, write, standby, output disable modes are available. The read, erase, erase verify, program, program verify and Device ID are accessed via the command register. Standard microprocessor write timings are used to input a command to the register. This register serves as the input to an internal state machine which controls the operation mode of the device. An internal latch is used for write cycles, addresses and data for programming and erase operations.

NO INTEGRATED STOP TIMER FOR ERASE

Leading industry flash technology requires a stop timer built into the flash chip to prevent the memory cells from going into depletion due to over erase. The 1 Mbit MTP

P/N: PM0767

3

REV. 0.6, OCT. 04, 2001

 

 

MX26C1000B

EPROMTM is built on an innovative cell concept in which over erasing the memory cell is impossible.

DATA WRITE PROTECTION

The design of the device protects against accidental erasure or programming. The internal state machine is automatically reset to the read mode on power-up. Using control register architecture, alteration of memory can only occur after completion of proper command sequences. The command register is only active when V PP is at high voltage. when V PP = V PPL , the device defaults to the Read Mode. Robust design features prevent inadvertent write cycles resulting from VCC power-up and power-downtransitionsorsystemnoise.Toavoidinitiation of write cycle during VCC power-up, a write cycle is locked out for VCC less than 4V. The twocommand program and erase write sequence to the command register provide additional software protection against spurious data changes.

PROGRAM VERIFY MODE

Verification should be performed on the programmed bits to determine that they were correctly programmed. Verification should be performed with OE and CE, at VIL, WE at VIH, and VPP at its programming voltage.

ERASE VERIFY MODE

Verification should be performed on the erased chip to determine that the whole chip(all bits) was correctly erased. Verification should be performed with OE and CE at VIL, WE at VIH, and VCC = 5V, VPP = 12.5V

AUTO IDENTIFY MODE

The auto identify mode allows the reading out of a binary code from MTP EPROM that will identify its manufacturer and device type. This mode is intended for use by programming equipment for the purpose of automatically matching the device to be programmed with its corresponding programming algorithm. This mode is functional in the 25°C ±5°C ambient temperature range that is required when programming the MX26C1000B.

To activate this mode, the programming equipment must

force 12.0 ± 0.5 V on address line A9 of the device. Two identifier bytes may then be sequenced from the device outputs by toggling address line A0 from VIL to VIH. All other address lines must be held at VIL during auto identify mode.

Byte 0 ( A0 = VIL) represents the manufacturer code, and byte 1 (A0 = VIH), the device identifier code. For the MX26C1000B, these two identifier bytes are given in the Mode Select Table. All identifiers for manufacturer and device codes will possess odd parity, with the MSB (DQ7) defined as the parity bit.

READ MODE

The MX26C1000B has two control functions, both of which must be logically satisfied in order to obtain data at the outputs. Chip Enable (CE) is the power control and should be used for device selection. Output Enable (OE) is the output control and should be used to gate data to the output pins, independent of device selection. Assuming that addresses are stable, address access time (tACC) is equal to the delay from CE to output (tCE). Data is available at the outputs tOE after the falling edge of OE, assuming that CE has been LOW and addresses have been stable for at least tACC - tOE.

STANDBY MODE

The MX26C1000B has a CMOS standby mode which reduces the maximum VCC current to 100 uA. It is placed in CMOS standby when CE is at VCC ± 0.3 V. The MX26C1000B also has a TTL-standby mode which reduces the maximum VCC current to 1.5 mA. It is placed in TTL-standby when CE is at VIH. When in standby mode, the outputs are in a high-impedance state, independent of the OE input.

SYSTEM CONSIDERATIONS

During the switch between active and standby conditions, transient current peaks are produced on the rising and falling edges of Chip Enable. The magnitude of these transient current peaks is dependent on the output capacitance loading of the device. At a minimum, a 0.1 uF ceramic capacitor (high frequency, low inherent inductance) should be used on each device between VCC and GND to minimize transient effects. In addition, to overcome the voltage drop caused by the inductive

P/N: PM0767

4

REV. 0.6, OCT. 04, 2001

 

 

MX26C1000B

effects of the printed circuit board traces on EPROM arrays, a 4.7 uF bulk electrolytic capacitor should be used between VCC and GND for each of the eight devices. The location of the capacitor should be close to where the power supply is connected to the array.

OUTPUT DISABLE

Output is disabled when OE is at logre high. When in output disabled all circuitry is enabled. Except the output pins are in a high impedance state(TRI-ATATE).

Table 1: BUS OPERATIONS

Mode

 

VPP(1)

A0

A9

CE

OE

WE

Q0~Q7

 

 

 

 

 

 

 

 

 

 

Read

VPPL

A0

A9

VIL

VIL

VIH

Data Out

 

 

 

 

 

 

 

 

 

READ-ONLY

Output Disable

VPPL

X

X

VIL

VIH

VIH

Tri-State

 

 

 

 

 

 

 

 

 

MODE

Standby

VPPL

X

X

VIH

X

X

Tri-State

 

 

 

 

 

 

 

 

 

 

Manufacturer Identification

VPPL

VIL

VID(2)

VIL

VIL

VIH

Data=C2H

 

 

 

 

 

 

 

 

 

 

Device Identification

VPPL

VIH

VID(2)

VIL

VIL

VIH

Data=CFH

 

 

 

 

 

 

 

 

 

 

Read

VPPH

A0

A9

VIL

VIL

VIH

Data Out(3)

 

 

 

 

 

 

 

 

 

COMMAND

Output Disable

VPPH

X

X

VIL

VIH

VIH

Tri-State

 

 

 

 

 

 

 

 

 

MODE

Standby(4)

VPPH

X

X(5)

VIH

X

X

Tri-State

 

 

 

 

 

 

 

 

 

 

Program

VPPH

A0

A9

VIL

VIH

VIL

Data Inb

 

 

 

 

 

 

 

 

 

Note:

1.Refer to DC Characteristics. When VPP=VPPL memory contents can be read but not written or erased.

2.VID is the intelligent identifier high voltage. Refer to DC Characteristics.

3.Read operations with VPP=VPPH may access array data or the intelligent identifier codes.

4.With VPP at high voltage the standby current equals ICC+IPP(standby).

5.Refer to Table 2 for vaild data-in during a write operation.

6.X can be VIL or VIH.

P/N: PM0767

5

REV. 0.6, OCT. 04, 2001

 

 

MX26C1000B

COMMAND MODE

The 1 Mbit MTP EPROMTM is in Command mode when high voltage VPPH is applied to the VPP pin. In this state the available functions are Read, Program, Program Verify, Erase and Erase Verify. Reset are selected by writing commands to the input register. Data from the register are input to the state machine. The output from the state machine determines the function of the device. The command register serves as a latch to store data for executing commands. It does not occupy addressable memory location. Standard microprocessor write timing is used. Table 2 defines the register commands. The command register is written by bringing WE to a logic-low Level (V IL), while CE is low. Addresses are latched on the falling edge of WE, while data is latched on the rising edge of the WE pulse.

Standby and Output disable functions are the same as in Read Mode, controlled by CE and OE. If the device is deselected during erasure, programming, or erase/ program verification, the device draws active current until the operations terminate.

READ COMMAND

To read memory content, write 00H into the command register while high voltage is applied to V PP pin (VPP = VPPH ). Microprocessor read cycle retrieves the data . The device remains enable for read until the data in the command register are altered. The device is default in read mode when power up. This is to ensure no accidental alteration of the memory occurs during power transition. Refer to AC Read Characteristics and Waveforms for specific timing parameters.

SET UP ERASE/ERASE

Preprogram operation is not required prior to the erase operation. A sequence of commands is required to perform a complete erase operation: set up erase, erase, and erase verify. High voltage is applied to the V PP pin

(VPP=VPPH). The command 20H is written to the command register to initiate the set-up erase mode.

ERASE OPERATION

The same command, 20H, is again written to the command register. This second command starts bulk

erase operation. The two-step command prevents accidental alteration to memory array. Erase operation starts with the rising edge of the WE pulse and terminates with the rising edge of the next WE pulse, which in this case is the erase verify command.

ERASE VERIFY

Each erase operation is followed by an erase verify. The command A0H is written into the command register. The address of the bytes to be verified is supplied with the command. The address is latched on the falling edge of the WE pulse. A reading FFH is returned to confirm all bits in the byte are erased. This sequence of Set Up EraseErase continues for each address until FFH is returned. This indicates the entire memory array is erasedandcompletestheoperation.Eraseverifyoperation starts at address 0000H and ends at the last address. Maximum erase pulse duration for the 1Mbit MTP EPROMTM is 100ms with a maximum 30 pulses. Refer to AC Characteristics and Waveforms for specific timing parameters.

P/N: PM0767

6

REV. 0.6, OCT. 04, 2001

 

 

MX26C1000B

PROGRAMMING ALGORITHM FLOW CHART

Start

Programming

Apply VPPH

PLSCNT=0

Write Set-up Program CMD

Write Program Cmd(A/D)

Time Out 10us

Write Program Verify Cmd

Time out 6us

Read Data From Device

 

NO

Verify Data ?

NO

Inc PLSNT=25 ?

YES

YES

NO

Increment Address

Last Address ?

YES

Write Read CMD

Apply VPPL

Apply VPPL

Programming

Programming

Completed

Error

P/N: PM0767

7

REV. 0.6, OCT. 04, 2001

 

 

Loading...
+ 16 hidden pages