A276308A
Programming and Program Verify
The programming flowchart is shown in Page 10.
The A276308A 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
6.25V, OE /VPP to +12.75V and CE is at V
IL
. 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 100µs 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 A276308A
whose VCC, address bus and data bus are connected in
parallel. When programming is performed, other
A276308A can be inhibited from being programmed by
setting their CE pins to V
IH
and OE /VPP pins to
+12.75V.
Programming Mode DC Characteristics
(Ta = 0°C to 70°C, VCC = 6.25V
±
0.25V, VPP = 12.75V
±
0.25V)
Symbol
V
OH
V
OL
V
IH
V
IL
I
LI
I
CC
I
PP
V
ID
VCC1
VPP1
Parameter
Output High Voltage
Output Low Voltage
Input High Voltage
Input Low Voltage
Input Leakage Current
VCC Current During Program
VPP Current During Program
A9 Auto Select Voltage
Programming Supply Voltage
Programming Voltage
11.5
6.0
12.5
2.0
-0.5
-1
Min.
2.4
0.4
VCC + 0.5
0.8
+1
50
50
12.5
6.5
13
Max.
Unit
V
V
V
V
µA
mA
mA
V
V
V
CE = V
IL
A9 = V
ID
VCC = max. Vin = 0V to VCC
Test Conditions
I
OH
= -400µA
I
OL
= 2.1mA
Note: VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP.
(December, 2001, Version 1.0)
7
AMIC Technology, Inc.
AMICC [ AMIC TECHNOLOGY ]
