CAT28F010
(1)
FUNCTION TABLE
Pins
WE
VIH
Mode
Read
CE
VIL
VIL
VIH
VIL
VIL
VIL
VIL
VIL
OE
VIL
VIH
X
VPP
VPPL
X
I/O
DOUT
High-Z
High-Z
31H
Notes
Output Disable
Standby
VIH
X
VPPL
X
Signature (MFG)
Signature (Device)
Program/Erase
Write Cycle
VIL
VIL
VIH
VIH
VIL
VIH
VIH
VIL
VIL
VIH
A0 = VIL, A9 = 12V
A0 = VIH, A9 = 12V
See Command Table
During Write Cycle
During Write Cycle
X
B4H
VPPH
VPPH
VPPH
DIN
DIN
Read Cycle
DOUT
WRITE COMMAND TABLE
Commands are written into the command register in one or two write cycles. The command register can be altered
only when V is high and the instruction byte is latched on the rising edge of WE. Write cycles also internally latch
PP
addresses and data required for programming and erase operations.
Pins
First Bus Cycle
Second Bus Cycle
Mode
Set Read
Operation
Address
DIN
00H
90H
90H
20H
A0H
40H
C0H
FFH
Operation
Read
Address
DIN
DOUT
DOUT
31H
Write
Write
Write
Write
Write
Write
Write
Write
X
X
AIN
00
01
X
Read Sig. (MFG)
Read Sig. (Device)
Erase
Read
X
Read
B4H
X
Write
20H
DIN
Erase Verify
Program
AIN
X
Read
X
DOUT
Write
AIN
X
Program Verify
Reset
X
Read
DOUT
X
Write
X
FFH
Note:
(1) Logic Levels: X = Logic ‘Do not care’ (VIH, VIL, VPPL, VPPH
)
Doc. No. 25005-0A 2/98 F-1
7
CATALYST [ CATALYST SEMICONDUCTOR ]
