A276308

PRELIMINARY

(December, 1998, Version 0.1)

7

AMIC Technology, Inc.

Programming and Program Verify

The programming flowchart is shown in Page 10.

The A276308 is shipped with all bits being set to "1".

Programming causes relevant bits to be changed to "0".

The programming mode is started by setting VCC to

Data to

be programmed can be directly input in the 8 bit format

through the data bus.

The write programming algorithm reduces programming

time by using 100

µs pulse followed by a byte verification

to determine whether the byte has been successfully

programmed. If the data does not pass the verification,

an additional pulse programming is applied for a

maximum of 25 pulses. On completion of 1 byte

programming and, The verified address is incremented.

After the final address is completed, all bytes are verified

again with VCC = 5.0 Volt.

Program Inhibit

This mode is used to program one of multiple A276308

whose VCC, address bus and data bus are connected in

parallel.

When

programming

is

performed,

other

A276308 can be inhibited from being programmed by

+12.75V.

°C to 70°C, VCC = 6.25V ± 0.25V, VPP = 12.75V ± 0.25V)

Symbol

Parameter

Min.

Max.

Unit

Test Conditions

Output High Voltage

2.4

V

µA

Output Low Voltage

0.4

V

Input High Voltage

2.0

VCC + 0.5

V

Input Low Voltage

-0.5

0.8

V

Input Leakage Current

-1

+1

µA

VCC = max. Vin = 0V to VCC

VCC Current During Program

50

mA

VPP Current During Program

50

mA

CE

A9 Auto Select Voltage

11.5

12.5

V

VCC1

Programming Supply Voltage

6.0

6.5

V

VPP1

Programming Voltage

12.5

13

V

Note: VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP.