A27020A Series
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.
Programming and Program Verify
The programming flowchart is shown in Page 10.
The A27020A 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
Program Inhibit
+5.25V and VPP to +12.25V, while CE and PGM are
This mode is used to program one of multiple A27020A
at VIL, and OE is at VIH. Data to be programmed can
be directly input in the 8 bit format through the data bus.
whose OE , PGM , VPP, VCC, address bus and data
bus are connected in parallel. When programming is
performed, other A27020A can be inhibited from being
The write programming algorithm reduces programming
programmed by setting their CE pins to VIH.
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
Programming Mode DC Characteristics (Ta = 0°C to 70°C, VCC = 5.25V ± 0.25V, VPP = 12.25V ± 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
5.0
12.5
5.5
V
V
V
VCC1
VPP1
12.0
12.5
Note: VCC must be applied simultaneously or before VPP and removed simultaneously or after VPP.
PRELIMINARY (June, 2005, Version 0.1)
7
AMIC Technology, Corp.
AMICC [ AMIC TECHNOLOGY ]
