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PDF A29160A Data sheet ( Hoja de datos )

Número de pieza A29160A
Descripción Boot Sector Flash Memory
Fabricantes AMIC Technology 
Logotipo AMIC Technology Logotipo



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No Preview Available ! A29160A Hoja de datos, Descripción, Manual

A29160A Series
2M X 8 Bit / 1M X 16 Bit CMOS 5.0 Volt-only,
Boot Sector Flash Memory
Document Title
2M X 8 Bit / 1M X 16 Bit CMOS 5.0 Volt-only, Boot Sector Flash Memory
Revision History
Rev. No.
0.0
1.0
1.1
1.2
History
Initial issue
Update ICC3, ICC4, Absolute Maximum Rating, Program/Erase time
and Data Retention
Page 6 “Writing Commands/Command Sequences” section :
Change
The “Word/Byte Program Command Sequence” section has details on
programming data to the device using both standard and Unlock Bypass
command sequence.
Into
The “Word/Byte Program Command Sequence” and “Unlock Bypass
Command Sequence” has detail descriptions on programming data to the
device using both standard and Unlock Bypass command sequence.
Page 18: Delete Note 8 and adjust the Notes in the Table 9
Issue Date
May 27, 2013
May 8, 2014
August 5, 2014
August 11, 2014
Remark
Preliminary
Final
(August, 2014, Version 1.2)
AMIC Technology, Corp.

1 page




A29160A pdf
Block Diagram
VCC
VSS
RY/BY
RESET
WP
WE
BYTE
CE
OE
State
Control
Command
Register
A0-A19
VCC Detector
A29160A Series
Sector Switches
Erase Voltage
Generator
I/O0 - I/O15 (A-1)
Input/Output
Buffers
PGM Voltage
Generator
Chip Enable
Output Enable
Logic
STB Data Latch
Timer
STB
Y-Decoder
X-decoder
Y-Gating
Cell Matrix
Pin Descriptions
Pin No.
A0 - A19
I/O0 - I/O14
I/O15 (A-1)
I/O15
A-1
CE
WE
WP
OE
RESET
BYTE
RY/ BY
VSS
VCC
NC
Description
Address Inputs
Data Inputs/Outputs
Data Input/Output, Word Mode
LSB Address Input, Byte Mode
Chip Enable
Write Enable
Write Protection
Output Enable
Hardware Reset
Selects Byte Mode or Word Mode
Ready/ BUSY - Output
Ground
Power Supply
Pin not connected internally
(August, 2014, Version 1.2)
4 AMIC Technology, Corp.

5 Page





A29160A arduino
A29160A Series
Sector Protection/Unprotection
The hardware sector protection feature disables both
program and erase operations in any sector. The hardware
sector unprotection feature re-enables both program and
erase operations in previously protected sectors.
It is possible to determine whether a sector is protected or
unprotected. See “Autoselect Mode” for details.
Sector protection / unprotection can be implemented via two
methods. The primary method requires VID on the RESET pin
only, and can be implemented either in-system or via
programming equipment. Figure 2 shows the algorithm and
the Sector Protect / Unprotect Timing Diagram illustrates the
timing waveforms for this feature. This method uses standard
microprocessor bus cycle timing. For sector unprotect, all
unprotected sectors must first be protected prior to the first
sector unprotect write cycle. The alternate method must be
implemented using programming equipment. The procedure
requires a high voltage (VID) on address pin A9 and the
control pins.
The device is shipped with all sectors unprotected.
It is possible to determine whether a sector is protected or
unprotected. See "Autoselect Mode" for details.
Hardware Data Protection
The requirement of command unlocking sequence for
programming or erasing provides data protection against
inadvertent writes (refer to the Command Definitions table).
In addition, the following hardware data protection measures
prevent accidental erasure or programming, which might
otherwise be caused by spurious system level signals during
VCC power-up transitions, or from system noise. The device
is powered up to read array data to avoid accidentally writing
data to the array.
Write Protect ( WP )
The Write Protect function provides a hardware method of
protecting the 16Kbytes of boot sector from erasure without
using VID.
If the system asserts VIL on the WP pin, the device disables
erase function for the 16Kbyte boot sector (SA34 for the top
boot device and SA0 for the bottom boot device)
independently of whether those sectors were protected or
unprotected using the method described in Sector
Protection/Unprotection.
If the system asserts VIH on the WP pin, the device reverts to
whether the 16Kbyte boot sector was previously set to
protect or unprotected using the method described in Sector
Protection/Unprotection.
Low VCC Write Inhibit
When VCC is lower than VLKO, the device does not accept
any write cycles. This protects data during VCC power up
and power down. The command register and all internal
program/erase circuits are disabled, and the device resets.
Subsequent writes are ignored until VCC is greater than
VLKO. The system must provide the proper signals to the
control pins to prevent unintentional writes when VCC is
greater than VLKO.
Write Pulse "Glitch" Protection
Noise pulses of less than 5ns (typical) on OE , CE or WE
do not initiate a write cycle.
Logical Inhibit
Write cycles are inhibited by holding any one of OE =VIL,
CE = VIH or WE = VIH. To initiate a write cycle, CE and
WE must be a logical zero while OE is a logical one.
Power-Up Write Inhibit
If WE = CE = VIL and OE = VIH during power up, the
device does not accept commands on the rising edge of
WE . The internal state machine is automatically reset to
reading array data on the initial power-up.
Temporary Sector Unprotect
This feature allows temporary unprotection of previous
protected sectors to change data in-system. The Sector
Unprotect mode is activated by setting the RESET pin to VID.
During this mode, formerly protected sectors can be
programmed or erased by selecting the sector addresses.
Once VID is removed from the RESET pin, all the previously
protected sectors are protected again. Figure 1 shows the
algorithm, and the Temporary Sector Unprotect diagram
shows the timing waveforms, for this feature.
START
RESET = VID
(Note 1)
Perform Erase or
Program Operations
RESET = VIH
Temporary Sector
Unprotect
Completed (Note 2)
Notes:
1. All protected sectors unprotected.
2. All previously protected sectors are protected once again.
Figure 1. Temporary Sector Unprotect Operation
(August, 2014, Version 1.2)
10 AMIC Technology, Corp.

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