M29F400 datasheet(13/34 Pages) STMICROELECTRONICS

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AI01275B

High Speed

1.5V

2.4V

Standard

0.45V

2.0V

0.8V

Figure 4. AC Testing Input Output Waveform

AI01276B

1.3V

OUT

CL = 30pF for High Speed

CL = 100pF for Standard

CL includes JIG capacitance

3.3k

Ω

1N914

DEVICE

UNDER

TEST

Figure 5. AC Testing Load Circuit

Symbol

Parameter

Test Condition

Min

Max

Unit

CIN

Input Capacitance

VIN =0V

COUT

Output Capacitance

VOUT =0V

Note: 1. Sampled only, not 100% tested.

Table 12. Capacitance (1) (TA =25

°C, f = 1 MHz )

Block Erase (BE) Instruction. This instruction

uses a minimum of six write cycles. The Erase

Set-up command 80h is written to address AAAAh

in the Byte-wide configuration or address 5555h in

the Word-wide configuration on third cycle after the

two Coded cycles. The Block Erase Confirm com-

mand 30h is similarly written on the sixth cycle after

another two Coded cycles. During the input of the

second command an address within the block to be

erased is given and latched into the memory. Addi-

tional block Erase Confirm commands and block

addresses can be written subsequently to erase

other blocks in parallel, without further Coded cy-

cles. The erase will start after the erase timeout

period (see Erase Timer Bit DQ3 description).

Thus, additional Erase Confirm commands for

other blocks must be given within this delay. The

input of a new Erase Confirm command will restart

the timeout period. The status of the internal timer

can be monitored through the level of DQ3, if DQ3

is ’0’ the Block Erase Command has been given

and the timeout is running, if DQ3 is ’1’, the timeout

has expired and the P/E.C. is erasing the Block(s).

If the second command given is not an erase

confirm or if the Coded cycles are wrong, the

instruction aborts, and the device is reset to Read

Array. It is not necessary to program the block with

00h as the P/E.C. will do this automatically before

to erasing to FFh. Read operations after the sixth

rising edge of W or E output the status register

status bits.

High Speed

Standard

Input Rise and Fall Times

≤ 10ns

Input Pulse Voltages

0 to 3V

0.45V to 2.4V

Input and Output Timing Ref. Voltages

1.5V

0.8V and 2V

Table 11. AC Measurement Conditions

13/34

M29F400T, M29F400B

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