NT68P81 查看數據表（PDF） - Novatek Microelectronics
零件编号
产品描述 (功能)
生产厂家
NT68P81 Datasheet PDF : 30 Pages
| |||
NT68P81
OTP ROM Mega Cell Mode Selection
RESET = 12.75V, VPIL = VIL,
VPIH = VIH
not VPP
Mode [0..2]
－
Mode
Normal Operating
CE
OE
VPP DB0-DB7
－
－
－
－
VPP
VPP
VPP
VPP
VPP
VPP
000
Output Disable
－
VIH
－
high-Z
000
Program
VIH
VIH
VPP
data in
000
Program Verify
VIH
VIL
－
data out
000
Program Inhibit (Standby)
VIL
－
VPP
high-Z
001
Security (Program)
VIH
－
VPP
data in
010
Word-line Stress
－
－
VPP
－
VPP
011
Bit-line Stress
－
－
VPP
“0”
VPP
100
VPP
101
*The security byte is at $0000 address.
OTP Row (after pkg)
OTP Column (after pkg)
VIH
VIH
VPP
VIH
VIH
VPP
data in
data in
READ MODE
The NT68P81's OTP ROM mega cell has 2 control pins.
The CE (chip enable) controls the operation power and is
used for device selection. The OE (output enable)
controls the output buffers.
OUTPUT DISABLE MODE
If OE = VIH, the outputs will be in a high impedance state.
So two or more ROMs can be connected together on a
common bus.
STANDBY MODE
By applying a low level to the chip is in standby mode, it
will reduce the operating current to 100µA.
PROGRAM MODE
Initially, all bits are in "1" state which is an erased state.
Thus the program operation is to introduce "0" data into
the desired bit locations by electronic programming.
When the VPP input is at 12.75V and CE is at VIH, the chip
is in the PROGRAMMING mode.
PROGRAM VERLFY MODE
The VERIFY mode will check to see that the desired data
is correctly programmed on the programmed bit. The
VERIFY is accomplished with CE at VIH, VPP input is at
12.75V, and OE = VIL.
PROGRAM INHIBIT
Using this mode, programming of two or more OTP ROMs
in parallel with different data is accomplished. All inputs
except for CE and OE may be commonly connected. The
TTL high level program pulse is only applied to the CE of
the desired device and TTL high level signal is applied to
the other devices.
12
Share Link: 