A278308A
Programming and Program Verify
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.
The programming flowchart is shown in Page 10.
The A278308A 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 and VPP to +12.75V, while CE and PGM are at
Program Inhibit
VIL, and OE is at VIH. Data to be programmed can be
directly input in the 8 bit format through the data bus.
This mode is used to program one of multiple A278308A
whose OE , PGM, VPP, VCC, address bus and data bus
are connected in parallel. When programming is
performed, other A278308A can be inhibited from being
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
programmed by setting their CE pins to VIH.
Programming Mode DC Characteristics (Ta = 0°C to 70°C, VCC = 6.25V ± 0.25V, VPP = 12.75V ± 0.25V)
Symbol
VOH
VOL
VIH
Parameter
Output High Voltage
Min.
Max.
Unit
V
Test Conditions
IOH = -400µA
2.4
Output Low Voltage
0.4
VCC + 0.5
0.8
V
IOL = 2.1mA
Input High Voltage
2.0
-0.5
-1
V
VIL
Input Low Voltage
V
ILI
Input Leakage Current
VCC Current During Program
VPP Current During Program
+1
VCC = max. Vin = 0V to VCC
µA
mA
mA
ICC
50
IPP
50
CE = VIL
A9 = VID
VID
A9 Auto Select Voltage
Programming Supply Voltage
Programming Voltage
11.5
6.0
12.5
6.5
13
V
V
V
VCC1
VPP1
12.5
Note: VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP.
(October, 2003, Version 1.0)
7
AMIC Technology, Corp.
AMICC [ AMIC TECHNOLOGY ]
