- Provides a software method of detecting completion of
program or erase operations
pin (RY / BY)
BUSY
program or erase operations
- Suspends a sector erase operation to read data from, or
program data to, a non-erasing sector, then resumes the
erase operation
RESET
- Hardware method to reset the device to reading array
data
/ACC input pin
WP
- Write protect (
outermost boot sectors, regardless of sector protect
status
- Acceleration (ACC) function provides accelerated
program times
command allows code changes in previously locked
sectors
- 48-pin TSOP (I) or 48-ball TFBGA
- All Pb-free (Lead-free) products are RoHS compliant
WP
)
) function allows protection of two
General Description
The A29L320A is a 32Mbit, 3.3 volt-only Flash memory
organized as 2,097,152 words of 16 bits or 4,194,304 bytes
of 8 bits each. The 8 bits of data appear on I/O0 - I/O7; the 16
bits of data appear on I/O
48-ball TFBGA and 48-Pin TSOP packages. This device is
designed to be programmed in-system with the standard
system 3.3 volt VCC supply. Additional 12.0 volt VPP is not
required for in-system write or erase operations. However,
the A29L320A can also be programmed in standard EPROM
programmers.
The A29L320A has the first toggle bit, I/O
whether an Embedded Program or Erase is in progress, or it
is in the Erase Suspend. Besides the I/O
A29L320A has a second toggle bit, I/O
the addressed sector is being selected for erase. The
A29L320A also offers the ability to program in the Erase
(November, 2007, Version 1.1) 1
0~I/O15. The A29L320A is offered in
6, which indicates
6 toggle bit, the
2, to indicate whether
Suspend mode. The standard A29L320A offers access times
of 70,80,90 and 120ns, allowing high-speed microprocesso rs
to operate without wait states. To eliminate bus contention
the device has separate chip enable (
(
) and output enable (OE) controls.
WE
The device requires only a single 3.3 volt power supply for
both read and write functions. Internally generated and
regulated voltages are provided for the program and erase
operations.
The A29L320A is entirely software command set compatible
with the JEDEC single-power-supply Flash standard.
Commands are written to the command register using
standard microprocessor write timings. Register contents
serve as input to an internal state-machine that controls the
erase and programming circuitry. Write cycles also internally
latch addresses and data needed for the programming and
), write enable
CE
AMIC Technology, Corp.
Page 3
A29L320A Series
erase operations. Reading data out of the device is similar to
reading from other Flash or EPROM devices.
Device programming occurs by writing the proper program
command sequence. This initiates the Embedded Program
algorithm - an internal algorithm that automatically times the
program pulse widths and verifies proper program margin.
Device erasure occurs by executing the proper erase
command sequence. This initiates the Embedded Erase
algorithm - an internal algorithm that automatically
preprograms the array (if it is not already programmed)
before executing the erase operation. During erase, the
device automatically times the erase pulse widths and
verifies proper erase margin. The Unlock Bypass mode
facilitates faster programming times by requiring only two
write cycles to program data instead of four.
The host system can detect whether a program or erase
operation is complete by observing the RY /
reading the I/O
7 (
Polling) and I/O6 (toggle) status bits.
Data
pin, orby
BY
After a program or erase cycle has been completed, the
device is ready to read array data or accept another
command.
The sector erase architecture allows memory sectors to be
erased and reprogrammed without affecting the data
Pin Configurations
TSOP (I)
contents of other sectors. The A29L320A is fully erased
when shipped from the factory.
The hardware sector protection feature disables operations
for both program and erase in any combination of the
sectors of memory. This can be achieved via programming
equipment.
The Erase Suspend/Erase Resume feature enables the user
to put erase on hold for any period of time to read data from,
or program data to, any other sector that is not selected for
erasure. True background erase can thus be achieved.
The hardware
RESET
pin terminates any operation in
progress and resets the internal state machine to reading
array data. The
RESET
pin may be tied to the system reset
circuitry. A system reset would thus also reset the device,
enabling the system microprocessor to read the boot-up
firmware from the Flash memory.
The device offers two power-saving features. When
addresses have been stable for a specified amount of time,
the device enters the automatic sleep mode. The system can
also place the device into the standby mode. Power
consumption is greatly reduced in both these modes.
A14
A13
A12
A11
A10
A19
A20
WE
RESET
NC
WP/ACC
RY/BY
A18
A17
1
2
3
4
5
6
7
A9
8
A8
9
10
11
12
13
14
15
16
17
A7
18
A6
19
A5
20
A4
21
A3
22
A2
23
A1
2425
A29L320AV
48
A16A15
47
BYTE
46
VSS
I/O 15(A-1)
45
I/O7
44
I/O14
43
I/O6
42
I/O13
41
I/O5
40
I/O12
39
I/O
38
VCC
37
I/O 11
36
I/O3
35
I/O 10
34
33I/O
32I/O9
31
I/O1
30
I/O8
29
I/O0
28
OE
27
VSS
26
CE
A0
4
2
(November, 2007, Version 1.1) 2 AMIC Technology, Corp.
Page 4
A29L320A Series
Pin Configurations (continued)
TFBGA
TFBGA
Top View, Balls Facing Down
A6B6C6D6E6F6
G6
H6
A13A12A14A15A16BYTEI/O15(A-1)VSS
A5B5C5D5E5F5
A9A8A10A11I/O
A4B4C4D4E4F4
7I/O14I/O13I/O6
G5
G4
H5
H4
WERESETNCA19I/O5I/O12VCCI/O4
A3B3C3D3E3F3
RY/BYA18A20I/O2I/O10I/O11I/O3
WP/ACC
A2B2C2D2E2F2
G3
G2
H3
H2
A7A17A6A5I/O0I/O8I/O9I/O1
A1B1C1D1E1F1
A3A4A2A1A0
CEOE
G1
H1
VSS
(November, 2007, Version 1.1) 3 AMIC Technology, Corp.
Page 5
A29L320A Series
Block Diagram
VCC
VSS
RESET
WE
BYTE
WP/ACC
CE
OE
A0-A20
RY/BY
State
Control
Command
Register
VCC Detector
PGM Voltage
Generator
Timer
Sector Switches
Erase Voltage
Generator
STB
Chip Enable
Output Enable
Logic
Y-Decoder
X-decoder
Address Latch
STB
0 - I/O15 (A-1)
I/O
Input/Output
Buffers
Data Latch
Y-Gating
Cell Matrix
Pin Descriptions
A0 – A20 Address Inputs
I/O0 - I/O14 Data Inputs/Outputs
I/O15 (A-1)
RESET
WP
Pin No. Description
I/O15 Data Input/Output, Word Mode
A-1 LSB Address Input, Byte Mode
CE
WE
OE
BYTE
RY/BY
Chip Enable
Write Enable
Output Enable
Hardware Reset
Selects Byte Mode or Word Mode
Ready/
BUSY
- Output
VSS Ground
VCC Power Supply
NC Pin not connected internally
/ACC
Hardware Write Protect / Acceleration Pin
(November, 2007, Version 1.1) 4 AMIC Technology, Corp.
Page 6
A29L320A Series
E
Absolute Maximum Ratings*
Storage Temperature Plastic Packages. . . -65°C to + 150°C
Ambient Temperature with Power Applied. -55°C to + 125°C
Voltage with Respect to Ground
1. Minimum DC voltage on input or I/O pins is -0.5V. During
voltage transitions, input or I/O pins may undershoot VSS
to -2.0V for periods of up to 20ns. Maximum DC voltage
on input and I/O pins is VCC +0.5V. During voltage
transitions, input or I/O pins mayovershoot to VCC +2.0V
for periods up to 20ns.
2. Minimum DC input voltage on A9,
0.5V. During voltage transitions, A9,
may overshoot VSS to -2.0V for periods of up to 20ns.
Maximum DC input voltage on A9 is +10.5V which may
overshoot to 14.0V for periods up to 20ns.
3. No more than one output is shorted at a time. Duration of
the short circuit should not be greater than one second.
OE
and
OE
RESET
and
is -
RESET
Device Bus Operations
This section describes the requirements and use of the
device bus operations, which are initiated through the
internal command register. The command register itself does
not occupy any addressable memory location. The register is
composed of latches that store the commands, along with
the address and data information needed to execute the
*Comments
Stresses above those listed under "Absolute Maximum
Ratings" may cause permanent damage to this device.
These are stress ratings only. Functional operation of
this device at these or any other conditions above
those indicated in the operational sections of these
specification is not implied or intended. Exposure to
the absolute maximum rating conditions for extended periods
may affect device reliability.
VCC for all devices . . . . . . . . . . . . . . . . . . . . +2.7V to +3.6V
Operating ranges define those limits between which the
functionally of the device is guaranteed.
command. The contents of the register serve as inputs to the
internal state machine. The state machine outputs dictate the
function of the device. The appropriate device bus operations
table lists the inputs and control levels required, and the
resulting output. The following subsections describe each of
these operations in further detail.
A) . . . . . . . . . . . . . . . . 0°C to +70°C
Table 1. A29L320A Device Bus Operations
CE
Read L L H H L/H AIN DOUT DOUT
Write L H L H (Note 3)AIN(Note 4)(Note 4)
Accelerated
Program
Standby
Output Disable L H H H L/H X High-Z High-Z High-Z
Reset
2. The sector protect and sector unprotect functions may also be implemented via programming equipment. See “Sector/Sector
Block Protection and Unprotection”.
3. If
/ACC=VIL, the two outermost boot sectors remain protected. If
WP
L H L H V
VCC ±
0.3 V
X X X L
L H L V
L H L V
X X X V
IL, H = Logic High = VIH, VID = 8.5V-10.5V, VHH = 8.5V-10.5V, X = Don't Care, DIN = Data In, DOUT = Data Out, AIN = Address In
WE
OE
X X
RESET
VCC ±
0.3 V
ID
ID L/H
ID L/H AIN (Note 4)(Note 4) High-Z
=VIH), A20: A
BYT
/
WP
ACC
HH AIN (Note 4)(Note 4) High-Z
H X High-Z High-Z High-Z
L/H X
L/H
A0 - A20
(Note 1)
Sector Address,
A6=L, A1=H, A0=L
Sector Address,
A6=H, A1=H, A0=L
in byte mode (
-1
I/O0 - I/O7
BYTE
High-Z High-Z
(Note 4)X X
(Note 4)X X
=VIL).
BYTE
/ACC=VIH, the two outermost boot sector
WP
I/O8 - I/O15 Operation
=VIH
BYTE
8~I/O14=High-Z
I/O
I/O15=A-1
High-Z
=VIL
protection depends on whether they were last protected or unprotected using the method described in
“Sector/Sector Block Protection and Unprotection. If
IN or DOUT as required by command sequence, data polling, or sector protection algorithm.
4. D
/ACC = VHH, all sectors are unprotected.
WP
(November, 2007, Version 1.1) 5 AMIC Technology, Corp.
Page 7
A29L320A Series
Word/Byte Configuration
The
operate in the byte or word configuration. If the
set at logic ”1”, the device is in word configuration, I/O
are active and controlled by
If the
configuration, and only I/O
and OE. I/O8-I/O14 are tri-stated, and I/O15 pin is used
CE
as an input for the LSB(A-1) address function.
pin determines whether the I/O pins I/O15-I/O0
BYTE
and OE.
CE
pin is set at logic “0”, the device is in byte
BYTE
0-I/O7 are active and controlled by
BYTE
pin is
15-I/O0
Requirements for Reading Array Data
To read array data from the outputs, the system must drive
the
selects the device.
data to the output pins.
during read operation. The
and OE pins to VIL. CE is the power control and
CE
is the output control and gates array
OE
should remain at VIH all the time
WE
pin determines whether
BYTE
the device outputs array data in words and bytes. The
internal state machine is set for reading array data upon
device power-up, or after a hardware reset. This ensures that
no spurious alteration of the memory content occurs during
the power transition. No command is necessary in this mode
to obtain array data. Standard microprocessor read cycles
that assert valid addresses on the device address inputs
produce valid data on the device data outputs. The device
remains enabled for read access until the command register
contents are altered.
See "Reading Array Data" for more information. Refer to the
AC Read Operations table for timing specifications and to the
Read Operations Timings diagram for the timing waveforms,
CC1 in the DC Characteristics table represents the active
l
current specification for reading array data.
Writing Commands/Command Sequences
To write a command or command sequence (which include s
programming data to the device and erasing sectors of
memory), the system must drive
to VIH. For program operations, the
OE
determines whether the device accepts program data in
bytes or words, Refer to “Word/Byte Configuration” for more
information. The device features an Unlock Bypass mode to
facilitate faster programming. Once the device enters the
Unlock Bypass mode, only two write cycles are required to
program a word or byte, instead of four. The “
Word / Byte Program Command Sequence” section has
details on programming data to the device using both
standard and Unlock Bypass command sequence. An erase
operation can erase one sector, multiple sectors, or the
entire device. The Sector Address Tables indicate the
address range that each sector occupies. A "sector address"
consists of the address inputs required to uniquely select a
sector. See the "Command Definitions" section for details on
erasing a sector or the entire chip, or suspending/resuming
the erase operation.
After the system writes the autoselect command sequence,
the device enters the autoselect mode. The system can then
read autoselect codes from the internal register (which is
separate from the memory array) on I/O
read cycle timings apply in this mode. Refer to the
"Autoselect Mode" and "Autoselect Command Sequence"
sections for more information.
ICC2 in the DC Characteristics table represents the active
current specification for the write mode. The "AC
and CE to VIL, and
WE
BYTE
7 - I/O0. Standard
pin
Characteristics" section contains timing specification tables
and timing diagrams for write operations.
Program and Erase Operation Status
During an erase or program operation, the system may
check the status of the operation by reading the status bits
on I/O7 - I/O0. Standard read cycle timings and ICC read
specifications apply. Refer to "Write Operation Status" for
more information, and to each AC Characteristics section for
timing diagrams.
Standby Mode
When the system is not reading or writing to the device, it
can place the device in the standby mode. In this mode,
current consumption is greatly reduced, and the outputs are
placed in the high impedance state, independent of the
OE
input.
The device enters the CMOS standby mode when the
RESET
more restricted voltage range than V
are held at V
pins are both held at VCC ± 0.3V. (Note that this is a
IH.) If
IH, but not within VCC ± 0.3V, the device will be
CE
and
CE
RESET
&
in the standby mode, but the standby current will be greater.
The device requires the standard access time (tCE) before it
is ready to read data.
If the device is deselected during erasure or programming,
the device draws active current until the operation is
completed.
I
CC3 andICC4 in the DC Characteristics tables represent the
standby current specification.
Automatic Sleep Mode
The automatic sleep mode minimizes Flash device energy
consumption. The device automatically enables this mode
when addresses remain stable for tACC +30ns. T he automatic
sleep mode is independent of the
,WEand OE control
CE
signals. Standard address access timings provide new data
when addresses are changed. While in sleep mode, output
data is latched and always available to the system. I
CC4 in the
DC Characteristics table represents the automatic sleep
mode current specification.
Output Disable Mode
When the OE input is at VIH, output from the device is
disabled. The output pins are placed in the high im pedance
state.
RESET
The
the device to reading array data. When the system drives the
RESET
immediately terminates any operation in progress, tristates
all data output pins, and ignores all read/write attempts for
the duration of the
internal state machine to reading array data. The operation
that was interrupted should be reinitiated once the device is
ready to accept another command sequence, to ensure data
integrity.
Current is reduced for the duration of the
When
CMOS standby current (I
within VSS ± 0.3V, the standby current will be greater.
: Hardware Reset Pin
RESET
pin provides a hardware method of resetting
pin low for at least a period of tRP, the device
pulse. The device also resets the
pulse.
CC4 ). If
RESET
RESET
is held at VIL but not
RESET
RESET
is held at VSS ± 0.3V, the device draws
(November, 2007, Version 1.1) 6 AMIC Technology, Corp.
Page 8
A29L320A Series
The
RESET
system reset would thus also reset the Flash memory,
enabling the system to read the boot-up firmware from the
Flash memory.
If
RESET
the RY/
operation is complete, which requires a time tREADY (during
Embedded Algorithms). The system can thus monitor
pin may be tied to the system reset circuitry. A
is asserted during a program or erase operation,
pin remains a “0” (busy) until the internal reset
BY
RY/
complete. If
operation is not executing (RY/
operation is completed within a time of tREADY (not during
Embedded Algorithms). The system can read data tRH after
the
Refer to the AC Characteristics tables for
parameters and diagram.
to determine whether the reset operation is
BY
is asserted when a program or erase
pin is “1”), the reset
BY
RESET
RESET
pin return to VIH.
Table 2. A29L320A Top Boot Block Sector Address Table
in byte mode and A20 : A0 in word mode. See “Word/Byte Configuration” section.
-1
(November, 2007, Version 1.1) 10 AMIC Technology, Corp.
Page 12
A29L320A Series
Autoselect Mode
The autoselect mode provides manufacturer and device
identification, and sector protection verification, through
identifier codes output on I/O7 - I/O0. This mode is primarily
intended for programming equipment to automatically match
a device to be programmed with its corresponding
programming algorithm. However, the autoselect codes can
also be accessed in-system through the command register.
When using programming equipment, the autoselect mode
requires VID (8.5V to 10.5V) on address pin A9. Address pins
A6, A1, and A0 must be as shown in Autoselect Codes (High
Voltage Method) table. In addition, when verifying sector
protection, the sector address must appear on the
appropriate highest order address bits. Refer to the
corresponding Sector Address Tables. The Command
Definitions table shows the remaining address bits that are
don't care. When all necessary bits have been set as
required, the programming equipment may then read the
corresponding identifier code on I/O
7 - I/O0.To access the
autoselect codes in-system, the host system can issue the
autoselect command via the command register, as shown in
the Command Definitions table. This method does not
require VID. See "Command Definitions" for details on using
the autoselect mode.
Table 4. A29L320A Autoselect Codes (High Voltage Method)
Description
Mode
CE
I/O
8
to
15
A20
A11
OE
WE
to
A12
A9A8
to
A10
to
A7
A6A5
to
A2
A1A0 I/O
Manufacturer ID: AMIC L L H X X VIDXLXLL X 37h
Device ID:
A29L320A
(Top Boot Block)
Word
Byte
L L H X X V
IDXLXLH
22h F6h
X F6h
I/O
to
I/O
7
0
Device ID:
A29L320A
(Bottom Boot Block)
Word
Byte
22h F9h
L L H X X VIDXLXLH
X F9h
Continuation ID L L H X X VIDXLXHH X 7Fh
X
Sector Protection Verification L L H SAX VIDXLXHL
X
01h
(protected)
00h
(unprotected)
L=Logic Low= VIL, H=Logic High=VIH, SA=Sector Address, X=Don’t Care.
Note: The autoselect codes may also be accessed in-system via command sequences.
(November, 2007, Version 1.1) 11 AMIC Technology, Corp.
Page 13
A29L320A Series
Sector/Sector Block Protection and Unprotection
(Note: For the following discussion, the term “sector” applies
to both sectors and sector blocks. A sector block consists of
two or more adjacent sectors that are protected or
unprotected at the same time (see Tables 5 and 6).
Table 5. Top Boot Sector/Sector Block Addresses for
Protection/Unprotection
(November, 2007, Version 1.1) 12 AMIC Technology, Corp.
Page 14
A29L320A 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
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 for protection and unprotection is by software sector
block protect/unprotect command. See Figure 2 for
Command Flow.
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.
pin only, and can be implemented either in-system or
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 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,
= VIH or WE = VIH. To initiate a write cycle, CE and
CE
must be a logical zero while OE is a logical one.
WE
Power-Up Write Inhibit
If
= CE = VIL and OE = VIH during power up, the
WE
device does not accept commands on the rising edge of
. The internal state machine is automatically reset to
WE
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
During this mode, formerly protected sectors can be
programmed or erased by selecting the sector addresses.
Once VID is removed from the
protected sectors are protected again. Figure 1 shows the
algorithm, and the Temporary Sector Unprotect diagram
shows the timing waveforms, for this feature.
RESET
RESET
pin, all the previously
pin to VID.
(November, 2007, Version 1.1) 13 AMIC Technology, Corp.
Page 15
A29L320A Series
START
RESET = VID
(Note 1)
Perform Erase or
Program Operations
RESET = VIH
Temporary Sector
Unprotect
Completed (Note 2)
Notes:
1. All protected sectors unprotected (If WP/ACC=V
outermost boot sectors will remain protected).
2. All previously protect ed sectors are protected once again.
IL,
START
555/AA + 2AA/55 + 555/77
(Note 1)
Perform Erase or
Program Operations
XXX/F0
(Reset Command)
Soft-ware Temporary
Sector Unprotect
Completed
(Note 2)
Notes:
1. All protected sectors unprotected (If WP/ACC=V
outermost boot sectors will remain protected).
2. All previously protected sectors are protected once again.
IL,
Figure 1-2. Temporary Sector Unprotect Operation by Software Mode
Figure 1-1. Temporary Sector Unprotect Operation by RESET Mode
(November, 2007, Version 1.1) 14 AMIC Technology, Corp.
Page 16
A29L320A Series
Temporary Sector
Unprotect Mode
Increment
PLSCNT
START
PLSCNT=1
RESET=VID
Wait 1 us
No
First Write
Cycle=60h?
Set up sector
address
Sector Protec:
Write 60h to sector
address with A6=0,
A1=1, A0=0
Wait 150 us
Verify Sector
Protect: Write 40h
to sector address
with A6=0, A1=1,
A0=0
Read from
sector address
with A6=0,
A1=1, A0=0
Yes
Reset
PLSCNT=1
Protect all sectors:
The indicated portion of
the sector protect
algorithm must be
performed for all
unprotected sectors prior
to issuing the first sector
unprotect address
Increment
PLSCNT
START
PLSCNT=1
RESET=VID
Wait 1 us
No
First Write
Cycle=60h?
All sectors
protected?
Set up first sector
address
Sector Unprotect:
Write 60h to sector
address with A6=1,
A1=1, A0=0
Wait 15 ms
Verify Sector
Unprotect : Write
40h to sector
address with A6=1,
A1=1, A0=0
Yes
Yes
No
Temporary Sector
Unprotect Mode
No
PLSCNT
=25?
Yes
Device failed
Sector Protect
Algorithm
No
Data=01h?
Yes
Protect another
sector?
No
Remove VID
from RESET
Write reset
command
Sector Protect
complete
No
Yes
PLSCNT=
1000?
Yes
Device failed
No
Sector Unprotect
Algorithm
Figure 2-1. In-System Sector Protect/Unprotect
Algorithms
Read from sector
address with A6=1,
A1=1, A0=0
Data=00h?
Yes
Last sector
verified?
Yes
Remove VID
from RESET
Write reset
Command
Sector Unprotect
complete
Set up
next sector
address
No
(November, 2007, Version 1.1) 15 AMIC Technology, Corp.
Page 17
A29L320A Series
Temporary Sector
Unprotect Mode
Increment
PLSCNT
START
PLSCNT=1
555/AA + 2AA/55 +
555/77
Wait 1 us
No
First Write
Cycle=60h?
Set up sector
address
Sector Protect:
Write 60h to sector
address with A6=0,
A1=1, A0=0
Wait 150 us
Verify Sector
Protect: Write 40h
to sector address
with A6=0, A1=1,
A0=0
Read from
sector address
with A6=0,
A1=1, A0=0
Yes
Reset
PLSCNT=1
Protect all sectors:
The indicated portion of
the sector protect
algorithm must be
performed for all
unprotected sectors prior
to issuing the first sector
unprotect address
Increment
PLSCNT
START
PLSCNT=1
555/AA + 2AA/55 +
555/77
Wait 1 us
No
First Write
Cycle=60h?
All sectors
protected?
Set up first sector
address
Sector Unprotect:
Write 60h to sector
address with A6=1,
A1=1, A0=0
Wait 15 ms
Verify Sector
Unprotect : Write
40h to sector
address with A6=1,
A1=1, A0=0
Yes
Yes
No
Temporary Sector
Unprotect Mode
No
PLSCNT
=25?
Yes
Device failed
Sector Protect
Algorithm
No
Data=01h?**
Yes
Protect another
sector?
No
Write reset
command
Sector Protect
complete
Yes
Sector Unprotect
Note: The term “sector” in the figure applies to both sectors and sector blocks
* No other command is allowed during this process
** Access time is 200ns-300ns
Figure 2-2. Software Sector/Sector Block Protection and Unprotection Algorithms
No
PLSCNT=
1000?
Yes
Device failed
Algorithm
Read from sector
address with A6=1,
A1=1, A0=0
No
Data=00h?**
Last sector
verified?
Write reset
Command
Sector Unprotect
complete
Set up
next sector
address
Yes
No
Yes
(November, 2007, Version 1.1) 16 AMIC Technology, Corp.
Page 18
A29L320A Series
Common Flash Memory Interface (CFI)
The Common Flash Interface (CFI) specification outlines
device and host system software interrogation handshake,
which allows specific vendor-specified software algorithms to
be used for entire families of devices. Software support can
then be device-independent, JEDEC ID-independent, and
forward- and backward-compatible for the specified flash
device families. Flash vendors can standardize their existing
interface for long-term compatibility.
This device enters the CFI Query mode when the system
writes the CFI Query command, 98h, to address 55h in word
mode (or address AAh in byte mode), any time the device is
ready to read array data. The system can read CFI
information at the addresses given in Table 5-8. In word
mode, the upper address bits (A7-MSB) must be all zeros.
To terminate reading CFI data, the system must write the
reset command.
The system can also write the CFI query command when the
device is in the autoselect mode. The device enters the CFI
query mode, and the system can read CFI data at the
addresses given in Table 5-8. The system must write the
reset command to return the device to the autoselect mode.
Address for Alternate OEM Extended Table (00h = none exists)
Table 8. System Interface String
Addresses
(Word Mode)
1Bh 36h 0027h VCC Min. (write/erase)
Addresses
(Byte Mode)
Data Description
I/O7- I/O4 : volt, I/O3- I/O0: 100 millivolt
1Ch 38h 0036h VCC Max. (write/erase)
I/O7- I/O4: volt, I/O3- I/O0: 100 millivolt
1Dh 3Ah 0000h Vpp Min. voltage (00h = no Vpp pin present)
1Eh 3Ch 0000h Vpp Max. voltage (00h = no Vpp pin present)
1Fh 3Eh 0004h
20h 40h 0000h
21h 42h 000Ah Typical timeout per individual block erase 2N ms
22h 44h 0000h Typical timeout for full chip erase 2N ms (00h = not supported)
23h 46h 0005h Max. timeout for b yte/word write 2N times typical
24h 48h 0000h Max. timeout for buffer write 2N times typical
25h 4Ah 0004h Max. timeout per individual block erase 2N times typical
26h 4Ch 0000h Max. timeout for full chip erase 2N times typical (00h = not supported)
Typical timeout per single byte/word write 2
Typical timeout for Min. size buffer write 2
N
μs
N
μs (00h = not supported)
(November, 2007, Version 1.1) 17 AMIC Technology, Corp.
Page 19
A29L320A Series
Table 9. Device Geometry Definition
Addresses
(Word Mode)
27h 4Eh 0016h Device Size = 2N byte
28h
29h
2Ah
2Bh
2Ch 58h 0002h Number of Erase Block Regions within device
2Dh
2Eh
2Fh
00 = Not Supported, 01 = 4 Word Page, 02 = 8 Word Page
00 = Not Supported, D7-D4: Volt, D3-D0: 100mV
00 = Not Supported, D7-D4: Volt, D3-D0: 100mV
02 = Bottom Boot Device, 03h = Top Boot Device
(November, 2007, Version 1.1) 19 AMIC Technology, Corp.
Page 21
A29L320A Series
Command Definitions
Writing specific address and data commands or sequences
into the command register initiates device operations. The
Command Definitions table defines the valid register
command sequences. Writing incorrect address and data
values or writing them in the improper sequence resets the
device to reading array data.
All addresses are latched on the falling edge of
whichever happens later. All data is latched on the rising
edge of
appropriate timing diagrams in the "AC Characteristics"
section.
or CE, whichever happens first. Refer to the
WE
WE
or CE,
Reading Array Data
The device is automatically set to reading array data after
device power-up. No commands are required to retrieve
data. The device is also ready to read array data after
completing an Embedded Program or Embedded Erase
algorithm. After the device accepts an Erase Suspend
command, the device enters the Erase Suspend mode. The
system can read array data using the standard read timings,
except that if it reads at an address within erase-suspended
sectors, the device outputs status data. After completing a
programming operation in the Erase Suspend mode, the
system may once again read array data with the same
exception. See "Erase Suspend/Erase Resume Commands"
for more information on this mode.
The system must issue the reset command to re-enable the
device for reading array data if I/O5 goes high, or while in the
autoselect mode. See the "Reset Command" section, next.
See also "Requirements for Reading Array Data" in the
"Device Bus Operations" section for more information. The
Read Operations table provides the read parameters, and
Read Operation Timings diagram shows the timing diagram.
Reset Command
Writing the reset command to the device resets the device to
reading array data. Address bits are don't care for this
command. The reset command may be written between the
sequence cycles in an erase command sequence before
erasing begins. This resets the device to reading array data.
Once erasure begins, however, the device ignores reset
commands until the operation is complete.
The reset command may be written between the sequence
cycles in a program command sequence before
programming begins. This resets the device to reading array
data (also applies to programming in Erase Suspend mode).
Once programming begins, however, the device ignores
reset commands until the operation is complete.
The reset command may be written between the sequence
cycles in an autoselect command sequence. Once in the
autoselect mode, the reset command must be written to
return to reading array data (also applies to autoselect during
Erase Suspend).
If I/O5 goes high during a program or erase operation, writing
the reset command returns the device to reading array data
(also applies during Erase Suspend).
Autoselect Command Sequence
The autoselect command sequence allows the host system to
access the manufacturer and devices codes, and determine
whether or not a sector is protected. The Command
Definitions table shows the address and data requirements.
This method is an alternative to that shown in the Autoselect
Codes (High Voltage Method) table, which is intended for
PROM programmers and requires VID on address bit A9.
The autoselect command sequence is initiated by writing two
unlock cycles, followed by the autoselect command. The
device then enters the autoselect mode, and the system may
read at any address any number of times, without initiating
another command sequence.
A read cycle at address XX00h retrieves the manufacturer
code and another read cycle at XX11h retrieves the
continuation code. A read cycle at address XX01h returns the
device code. A read cycle containing a sector address (SA)
and the address 02h in returns 01h if that sector is protected,
or 00h if it is unprotected. Refer to the Sector Address tables
for valid sector addresses.
The system must write the reset command to exit the
autoselect mode and return to reading array data.
Word/Byte Program Command Sequence
The system may program the device by word or byte,
depending on the state of the
four-bus-cycle operation. The program command sequence is
initiated by writing two unlock write cycles, followed by the
program set-up command. The program address and data are
written next, which in turn initiate the Embedded Program
algorithm. The system is not required to provide further
controls or timings. The device automatically provides
internally generated program pulses and verify the
programmed cell margin. Table 9 shows the address and data
requirements for the byte program command sequence.
When the Embedded Program algorithm is complete, the
device then returns to reading array data and addresses are
longer latched. The system can determine the status of the
program operation by using I/O
Operation Status” for information on these status bits.
Any commands written to the device during the Embedded
Program Algorithm are ignored. Note that a hardware reset
immediately terminates the programming operation. T he Byte
Program command sequence should be reinitiated once t he
device has reset to reading array data, to ensure data
integrity.
Programming is allowed in any sequence and across sector
boundaries. A bit cannot be programmed from a “0” back to a
“1”. Attempting to do so may halt the operation and set I/O5 to
“1”, or cause the
operation was successful. However, a succeeding read will
show that the data is still “0”. Only erase operations can
convert a “0” to a “1”.
Polling algorithm to indicate the
Data
pin. Programming is a
BYTE
7, I/O6, or RY/
BY
. See “White
(November, 2007, Version 1.1) 20 AMIC Technology, Corp.
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A29L320A Series
START
Write Program
Command
Sequence
Embedded
Program
algorithm in
progress
Data Poll
from System
Verify Data ?
No
Yes
Increment Address
No
Last Address ?
Yes
Programming
Completed
Note : See the appropriate Command Definitions table for
program command sequence.
Figure 3. Program Operation
Unlock Bypass Command Sequence
The unlock bypass feature allows the system to program
bytes or words to the device faster than using the standard
program command sequence. The unlock bypass command
sequence is initiated by first writing two unlock cycles. This is
followed by a third write cycle containing the unlock bypass
command, 20h. The device then enters the unlock bypass
mode. A two-cycle unlock bypass program command
sequence is all that is required to program in this mode. The
first cycle in this sequence contains the unlock bypass
program command, A0h; the second cycle contains the
program address and data. Additional data is programmed in
the same manner. This mode dispenses with the initial two
unlock cycles required in the standard program command
sequence, resulting in faster total programming time. Table 9
shows the requirements for the command sequence.
During the unlock bypass mode, only the Unlock Bypass
Program and Unlock Bypass Reset commands are valid. To
exit the unlock bypass mode, the system must issue the twocycle unlock bypass reset command sequence. The first
cycle must contain the data 90h; the second cycle the data
00h. Addresses are don’t care for both cycle. The device
returns to reading array data.
Figure 3 illustrates the algorithm for the program operation.
See the Erase/Program Operations in “AC Characteristics” for
parameters, and to Program Operation Timings for timing
diagrams.
Chip Erase Command Sequence
Chip erase is a six-bus-cycle operation. The chip erase
command sequence is initiated by writing two unlock cycles,
followed by a set-up command. Two additional unlock write
cycles are then followed by the chip erase command, which
in turn invokes the Embedded Erase algorithm. The device
does not require the system to preprogram prior to erase. The
Embedded Erase algorithm automatically preprograms and
verifies the entire memory for an all zero data pattern prior to
electrical erase. The system is not required to provide any
controls or timings during these operations. The Command
Definitions table shows the address and data requirements
for the chip erase command sequence.
Any commands written to the chip during the Embedded
Erase algorithm are ignored. The system can determine the
status of the erase operation by using I/O7, I/O6, or I/O2. See
"Write Operation Status" for information on these status bits.
When the Embedded Erase algorithm is complete, the devic e
returns to reading array data and addresses are no longer
latched.
Figure 4 illustrates the algorithm for the erase operation. See
the Erase/Program Operations tables in "AC Characteristics"
for parameters, and to the Chip/Sector Erase Operation
Timings for timing waveforms.
Sector Erase Command Sequence
Sector erase is a six-bus-cycle operation. The sector erase
command sequence is initiated by writing two unlock cycles,
followed by a set-up command. Two additional unlock write
cycles are then followed by the address of the sector to be
erased, and the sector erase command. The Command
Definitions table shows the address and data requirements
for the sector erase command sequence.
The device does not require the system to preprogram the
memory prior to erase. The Embedded Erase algorithm
automatically programs and verifies the sector for an all zero
data pattern prior to electrical erase. The system is not
required to provide any controls or timings during these
operations.
After the command sequence is written, a sector erase timeout of 50μs begins. During the time-out period, additional
sector addresses and sector erase commands may be
written. Loading the sector erase buffer may be done in any
sequence, and the number of sectors may be from one sector
to all sectors. The time between these additional cycles must
be less than 50μs, otherwise the last address and command
might not be accepted, and erasure may begin. It is
recommended that processor interrupts be disabled during
this time to ensure all commands are accepted. The
interrupts can be re-enabled after the last Sector Erase
command is written. If the time between additional sector
erase commands can be assumed to be less than 50μs, the
system need not monitor I/O
Sector Erase or Erase Suspend during the time-out period
resets the device to reading array data. The system must
rewrite the command sequence and any additional sector
addresses and commands.
3. Any command other than
(November, 2007, Version 1.1) 21 AMIC Technology, Corp.
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A29L320A Series
The system can monitor I/O3 to determine if the sector erase
timer has timed out. (See the " I/O
3: Sector Erase Timer"
section.) The time-out begins from the rising edge of the final
pulse in the command sequence.
WE
Once the sector erase operation has begun, only the Eras e
Suspend command is valid. All other commands are ignored.
When the Embedded Erase algorithm is complete, the device
returns to reading array data and addresses are no longer
latched. The system can determine the status of the erase
operation by using I/O7, I/O6, or I/O2. Refer to "Write
Operation Status" for information on these status bits.
4 illustrates the algorithm for the erase operation. Refer to
the Erase/Program Operations tables in the "AC
Characteristics" section for parameters, and to the Sector
Erase Operations Timing diagram for timing waveforms.
Erase Suspend/Erase Resume Commands
The Erase Suspend command allows the system to interrupt
a sector erase operation and then read data from, or
program data to, any sector not selected for erasure. This
command is valid only during the sector erase operation,
including the 50μs time-out period during the sector erase
command sequence. The Erase Suspend command is
ignored if written during the chip erase operation or
Embedded Program algorithm. Writing the Erase Suspend
command during the Sector Erase time-out immediately
terminates the time-out period and suspends the erase
operation. Addresses are "don't cares" when writing the
Erase Suspend command.
When the Erase Suspend command is written during a
sector erase operation, the device requires a maximum of
20μs to suspend the erase operation. However, when the
Erase Suspend command is written during the sector erase
time-out, the device immediately terminates the time-out
period and suspends the erase operation.
After the erase operation has been suspended, the system
can read array data from or program data to any sector not
selected for erasure. (The device "erase suspends" all
sectors selected for erasure.) Normal read and write timings
and command definitions apply. Reading at any address
within erase-suspended sectors produces status data on I/O7
- I/O0. The system can use I/O7, or I/O6 and I/O2 together, to
determine if a sector is actively erasing or is erasesuspended. See "Write Operation Status" for information on
these status bits.
After an erase-suspended program operation is complete,
the system can once again read array data within nonsuspended sectors. The system can determine the status of
the program operation using the I/O
as in the standard program operation. See "Write Operation
Status" for more information.
The system may also write the autoselect command
sequence when the device is in the Erase Suspend mode.
The device allows reading autoselect codes even at
addresses within erasing sectors, since the codes are not
stored in the memory array. When the device exits the
autoselect mode, the device reverts to the Erase Suspend
mode, and is ready for another valid operation. See
"Autoselect Command Sequence" for more information.
7 or I/O6 status bits, just
The system must write the Erase Resume command
(address bits are "don't care") to exit the erase suspend
mode and continue the sector erase operation. Further writes
of the Resume command are ignored. Another Erase
Suspend command can be written after the device has
resumed erasing.
START
Write Erase
Command
Sequence
No
Data Poll
from System
Data = FFh ?
Embedded
Erase
algorithm in
progress
Yes
Erasure Completed
Note :
1. See the appropriate Command Definitions table for erase
command sequences.
2. See "I/O
3
: Sector Erase Timer" for more information.
Figure 4. Erase Operation
(November, 2007, Version 1.1) 22 AMIC Technology, Corp.
Page 24
A29L320A Series
Table 11. A29L320A Command Definitions
Command
Sequence
(Note 1)
First Second Third Fourth Fifth Sixth
Cycles
Addr Data Addr DataAddr Data Addr Data Addr Data AddrData
Legend:
X = Don't care
RA = Address of the memory location to be read.
RD = Data read from location RA during read operation.
PA = Address of the memory location to be programmed. Addresses latch on the falling edge of the
whichever happens later.
PD = Data to be programmed at location PA. Data la tches on th e rising edge o f
SA = Address of the sector to be verified (in autoselect mode) or erased. Address bits A20- A12 select a unique sector.
Bus Cycles (Notes 2 - 5)
90 X0037
AAA
90
AAA
90
AAA
90
AAA
90
AAA
55
AAA
77
A0PAPD
AAA
20
AAA
80
AAA
55
80
AAA
WE
X02F6
X02F9
X06
(SA)
X02
(SA)
X04
7F
XX00
XX01
00
01
AA
AAA
AA
AAA
55
555
55 SA 30
555
WE
10
AAA
or CE pulse,
or CE pulse, whichever happens first.
(November, 2007, Version 1.1) 23 AMIC Technology, Corp.
Page 25
A29L320A Series
Note:
1. See Table 1 for description of bus operations.
2. All values are in hexadecimal.
3. Except when reading array or autosel ect data, all bus cycles are write operation.
4. Address bits A20 - A11 are don't cares for unlock and command cycles, unless SA or PA required.
5. No unlock or command cycles required when reading array data.
6. The Reset command is required to return to reading array data when device is in the autoselect mode, or if I/O
5 goes high
(while the device is providing status data).
7. The fourth cycle of the autoselect command sequence is a read cycle.
8. The data is 00h for an unprotected sector and 01h for a protected sector. See "Autoselect Command Sequence" for more
information.
9. Once a reset command is applied, software temporary unprotect is exit to return to read array data. But under erase
suspend condition, this command is still effective even a reset command has been appli ed. The reset command which can
deactivate the software temporary unprotect command is useful only after the erase command is complete.
10. Command is valid when device is ready to r ead array data or when device is in autoselect mode.
11. The Unlock Bypass command is required pri or to the Unlock Bypass Program command.
12. The Unlock Bypass Reset command is required to return to reading array data when the device is in the unlock bypass
mode.
13. The system may read and program in non-e rasing secto rs, or en te r the au tosele ct mode , when in the Era se Suspend mode .
14. The Erase Resume command is valid only during the Erase Suspen d mode.
(November, 2007, Version 1.1) 24 AMIC Technology, Corp.
Page 26
A29L320A Series
Write Operation Status
Several bits, I/O2, I/O3, I/O5, I/O6, I/O7, RY/
the A29L320A to determine the status of a write operation.
Table 10 and the following subsections describe the
functions of these status bits. I/O
7, I/O6 and RY/BY each
offer a method for determining whether a program or erase
operation is complete or in progress. These three bits are
discussed first.
are provided in
BY
START
Read I/O7-I/O
Address = VA
0
I/O7:
The
Polling
Data
Polling bit, I/O7, indicates to the host system
Data
whether an Embedded Algorithm is in progress or completed,
or whether the device is in Erase Suspend.
Data
Polling is
valid after the rising edge of the final WE pulse in the
program or erase command sequence.
During the Embedded Program algorithm, the device outputs
7 the complement of the datum programmed to I/O7.
on I/O
This I/O
7 status also applies to programming during Erase
Suspend. When the Embedded Program algorithm is
complete, the device outputs the datum programmed to I/O7.
The system must provide the program address to read valid
status information on I/O7. If a program address falls within a
protected sector,
Polling on I/O7 is active for
Data
approximately 2μs, then the device returns to reading array
data.
During the Embedded Erase algorithm,
Data
Polling
produces a "0" on I/O7. When the Embedded Erase algorithm
is complete, or if the device enters the Erase Suspend mode,
Polling produces a "1" on I/O7.This is analogous to the
Data
complement/true datum output described for the Embedded
Program algorithm: the erase function changes all the bits in
a sector to "1"; prior to this, the device outputs the
"complement," or "0." The system must provide an address
within any of the sectors selected for erasure to read valid
status information on I/O
7.
After an erase command sequence is written, if all sectors
selected for erasing are protected,
Polling on I/O7 is
Data
active for approximately 100μs, then the device returns to
reading array data. If not all selected sectors are protected,
the Embedded Erase algorithm erases the unprotected
sectors, and ignores the selected sectors that are protected.
When the system detects I/O
complement to true data, it can read valid data at I/O
on the following read cycles. This is because I/O
change asynchronously with I/O
) is asserted low. The
(
OE
7 has changed from the
7 - I /O0
7 may
0 - I/O6 while Output Enable
Polling Timings (During
Data
Embedded Algorithms) figure in the "AC Characteristics"
section illustrates this. Table 10 shows the outputs for
Polling on I/O
7. Figure 5 shows the
Polling algorithm.
Data
Data
Yes
I/O7 = Data ?
No
No
Note :
1. VA = Valid address for programming. During a sector
erase operation, a valid address is an address within any
sector selected for erasure. During chip erase, a valid
address is any non-protected sector address.
2. I/O
7
should be rechecked even if I/O5 = "1" because
I/O
7
may change simultaneously with I/O5.
I/O5 = 1?
Yes
Read I/O7 - I/O
Address = VA
I/O7 = Data ?
No
FAIL
0
Yes
PASS
Figure 5. Data Polling Algorithm
(November, 2007, Version 1.1) 25 AMIC Technology, Corp.
Page 27
A29L320A Series
RY/
BY
The RY/
: Read/
is a dedicated, open-drain output pin that
BY
Busy
indicates whether an Embedded algorithm is in progress or
complete. The RY/
the final
pulse in the command sequence. Since RY/BY
WE
is an open-drain output, several RY/
status is valid after the rising edge of
BY
pins can be tied
BY
together in parallel with a pull-up resistor to VCC.
If the output is low (Busy), the device is actively erasing or
programming. (This includes programming in the Erase
Suspend mode.) If the output is high (Ready), the device is
ready to read array data (including during the Erase Suspend
mode), or is in the standby mode.
Table 10 shows the outputs for RY/
. Refer to “
BY
RESET
Timings”, “Timing Waveforms for Program Operation” and
“Timing Waveforms for Chip/Sector Erase Operation” for
more information.
I/O6: Toggle Bit I
Toggle Bit I on I/O6 indicates whether an Embedded Program
or Erase algorithm is in progress or complete, or whether the
device has entered the Erase Suspend mode. Toggle Bit I
may be read at any address, and is valid after the rising edge
of the final
program or erase operation), and during the sector erase
time-out.
During an Embedded Program or Erase algorithm operation,
successive read cycles to any address cause I/O6 to toggle.
(The system may use either OE or CE to control the read
cycles.) When the operation is complete, I/O6 stops toggling.
After an erase command sequence is written, if all sectors
selected for erasing are protected, I/O6 toggles for
approximately 100μs, then returns to reading array data. If not
all selected sectors are protected, the Embedded Erase
algorithm erases the unprotected sectors, and ignores the
selected sectors that are protected.
The system can use I/O
whether a sector is actively erasing or is erase-suspended.
When the device is actively erasing (that is, the Embedded
Erase algorithm is in progress), I/O
enters the Erase Suspend mode, I/O
However, the system must also use I/O
sectors are erasing or erase-suspended. Alternatively, the
system can use I/O
Polling").
If a program address falls within a protected sector, I/O
toggles for approximately 2μs after the program command
sequence is written, then returns to reading array data.
6 also toggles during the erase-suspend-program mode,
I/O
and stops toggling once the Embedded Program algorithm is
complete.
The Write Operation Status table shows the outputs for
Toggle Bit I on I/O
algorithm, and to the Toggle Bit Timings figure in the "AC
Characteristics" section for the timing diagram. The I/O2 vs.
6 figure shows the differences between I/O2 and I/O6 in
I/O
graphical form. See also the subsection on " I/O
II".
pulse in the command sequence (prior to the
WE
6 and I/O2 together to determine
6 toggles. When the device
6 stops toggling.
2 to determine which
7 (see the subsection on " I/O7 :
6. Refer to Figure 6 for the toggle bit
2: Toggle Bit
Data
6
I/O2: Toggle Bit II
The "Toggle Bit II" on I/O2, when used with I/O6, indicates
whether a particular sector is actively erasing (that is, the
Embedded Erase algorithm is in progress), or whether that
sector is erase-suspended. Toggle Bit II is valid after the
rising edge of the final WE pulse in the command sequence.
2 toggles when the system reads at addresses within those
I/O
sectors that have been selected for erasure. (The system may
use either
or CE to control the read cycles.) But I/O2
OE
cannot distinguish whether the sector is actively erasing or is
erase-suspended. I/O
6, by comparison, indicates whether the
device is actively erasing, or is in Erase Suspend, but c annot
distinguish which sectors are selected for erasure. Thus, both
status bits are required for sector and mode information.
Refer to Table 10 to compare outputs for I/O
2 and I/O6.
Figure 6 shows the toggle bit algorithm in flowchart form, and
the section " I/O
also the " I/O
2: Toggle Bit II" explains the algorithm. See
6: Toggle Bit I" subsection. Refer to the Toggle
Bit Timings figure for the toggle bit timing diagram. The I/O
vs. I/O
6 figure shows the differences between I/O2 and I/O6 in
graphical form.
Reading Toggle Bits I/O6, I/O2
Refer to Figure 6 for the following discussion. Whenever the
system initially begins reading toggle bit status, it must read
I/O7 - I/O0 at least twice in a row to determine whether a
toggle bit is toggling. Typically, a system would note and store
the value of the toggle bit after the first read. After the second
read, the system would compare the new value of the toggle
bit with the first. If the toggle bit is not toggling, the device has
completed the program or erase operation. The system can
read array data on I/O7 - I/O0 on the following read cycle.
However, if after the initial two read cycles, the system
determines that the toggle bit is still toggling, the system also
should note whether the value of I/O
5). If it is, the system should then determine again
on I/O
5 is high (see the section
whether the toggle bit is toggling, since the toggle bit may
have stopped toggling just as I/O5 went high. If the toggle bit
is no longer toggling, the device has successfully completed
the program or erase operation. If it is still toggling, the device
did not complete the operation successfully, and the system
must write the reset command to return to reading array data.
The remaining scenario is that the system initially determines
that the toggle bit is toggling and I/O
5 has not gone high. The
system may continue to monitor the toggle bit and I/O
through successive read cycles, determining the status as
described in the previous paragraph. Alternatively, it may
choose to perform other system tasks. In this case, the
system must start at the beginning of the algorithm when it
returns to determine the status of the operation (top of Figure
6).
I/O5: Exceeded Timing Limits
I/O5 indicates whether the program or erase time has
exceeded a specified internal pulse count limit. Under these
conditions I/O5 produces a "1." This is a failure condition that
indicates the program or erase cycle was not successfully
completed.
2
5
(November, 2007, Version 1.1) 26 AMIC Technology, Corp.
Page 28
A29L320A Series
The I/O
5 failure condition may appear if the system tries to
program a "1 "to a location that is previously programmed to
"0." Only an erase operation can change a "0" back to a "1."
Under this condition, the device halts the operation, and
when the operation has exceeded the timing limits, I/O5
produces a "1."
Under both these conditions, the system must issue the reset
command to return the device to reading array data.
I/O3: Sector Erase Timer
After writing a sector erase command sequence, the system
may read I/O
operation has begun. (The sector erase timer does not apply
to the chip erase command.) If additional sectors are
selected for erasure, the entire time-out also applies after
each additional sector erase command. When the time-out is
complete, I/O
ignore I/O
between additional sector erase commands will always be
less than 50μs. See also the "Sector Erase Command
Sequence" section.
After the sector erase command sequence is written, the
system should read the status on I/O
(Toggle Bit 1) to ensure the device has accepted the
command sequence, and then read I/O
internally controlled erase cycle has begun; all further
commands (other than Erase Suspend) are ignored until the
erase operation is complete. If I/O
accept additional sector erase commands. To ensure the
command has been accepted, the system software should
check the status of I/O
subsequent sector erase command. If I/O
second status check, the last command might not have been
accepted. Table 10 shows the outputs for I/O3.
3 to determine whether or not an erase
3 switches from "0" to "1." The system may
3 if the system can guarantee that the time
7 (
3 is "0", the device will
3 prior to and following each
Polling) or I/O6
Data
3. If I/O3 is "1", the
3 is high on the
No
START
Read I/O7-I/O
Read I/O7-I/O
Toggle Bit
= Toggle ?
Yes
I/O5 = 1?
Yes
Read I/O7 - I/O
Twice
Toggle Bit
= Toggle ?
Yes
0
0
0
(Note 1)
No
(Notes 1,2)
No
Program/Erase
Operation Not
Commplete, Write
Reset Command
Notes :
1. Read toggle bit twice to determine whether or not it is
toggling. See text.
2. Recheck toggle bit because it may stop toggling as I/O
changes to "1". See text.
Program/Erase
Operation Complete
5
Figure 6. Toggle Bit Algorithm
(November, 2007, Version 1.1) 27 AMIC Technology, Corp.
2. See the "Erase and Programming Performance" section for more information.
μs
ns
ns
(November, 2007, Version 1.1) 35 AMIC Technology, Corp.
Page 37
A29L320A Series
Timing Waveforms for Program Operation
Addresses
CE
OE
WE
Data
RY/BY
VCC
t
VCS
Program Command Sequence (last two cycles)
t
WC
555h
t
CS
t
CH
t
WP
t
DS
A0hPD
t
t
WPH
AS
PA
t
DH
t
AH
t
BUSY
Read Status Data (last two cycles)
~
~
PA
~
~
~
~
~
~
t
WHWH1
~
~
~
~
~
~
~
~
Status
PA
D
OUT
t
RB
Note :
1. PA = program addrss, PD = program data, Dout is the true data at the program address.
2. Illustration shows device in word mode.
(November, 2007, Version 1.1) 36 AMIC Technology, Corp.
Page 38
A29L320A Series
Timing Waveforms for Chip/Sector Erase Operation
Addresses
CE
OE
WE
Data
RY/BY
VCC
t
VCS
Erase Command Sequence (last two cycles)
t
t
WC
2AAh
t
CS
555h for chip erase
t
CH
t
WP
t
DS
55h30h
AS
SA
t
WPH
t
DH
10h for chip erase
t
AH
~
~
~
~
~
~
t
BUSY
~
~
~
~
~
~
~
t
~
~
~
WHWH2
Read Status Data
VA
In
Progress
VA
Complete
t
RB
Note :
1. SA = Sector Address (for Sector Erase), VA = Valid Address for reading status data (see "Write Operaion Ststus").
2. Illustratin shows device in word mode.
(November, 2007, Version 1.1) 37 AMIC Technology, Corp.
Page 39
A29L320A Series
Timing Waveforms for
Addresses
CE
tCH
OE
WE
I/O7
tOEH
Polling (During Embedded Algorithms)
Data
tRC
tACC
tCE
tOE
tDF
tOH
Complement
~
~
VAVAVA
~
~
~
~
~
~
~
~
ComplementTrue
~
~
Valid Data
High-Z
I/O
0 - I/O6
RY/BY
Note : VA = Valid Address. Illustation shows first status cycle after command sequence, last status read cycle, and array data
read cycle.
High-Z
tBUSY
Status Data
Status DataTrue
~
~
~
~
Valid Data
High-Z
(November, 2007, Version 1.1) 38 AMIC Technology, Corp.
Page 40
A29L320A Series
Timing Waveforms for Toggle Bit (During Embedded Algorithms)
t
Addresses
CE
RC
VAVAVA
t
ACC
t
CE
t
CH
t
OE
~
~
VA
~
~
~
~
I/O6 ,
RY/BY
OE
WE
I/O
t
t
OEH
2
High-Z
t
BUSY
Valid Status
(first read)(second read)(stop togging)
DF
t
OH
Valid StatusValid StatusValid Data
~
~
~
~
~
~
~
~
Note: VA = Valid Address; not required for I/O6. Illustration shows first two status cycle after command sequence, last status
read cycle, and array data read cycle.
(November, 2007, Version 1.1) 39 AMIC Technology, Corp.
Page 41
A29L320A Series
Timing Waveforms for Sector Protect/Unprotect
V
ID
V
RESET
SA, A6,
A1, A0
Data
CE
WE
IH
~
~
Valid*Valid*Valid*
~
Sector Protect/UnprotectVerify
60h60h40hStatus
1us
Sector Protect:150us
Sector Unprotect:15ms
~
~
~
~
~
OE
Note : For sector protect, A6=0, A1=1, A0=0. For sector unprotect, A6=1, A1=1, A0=0
Timing Waveforms for I/O
Enter
Embedded
Erasing
WE
I/O
6
I/O
2
2 vs. I/O6
Erase
Suspend
~
~
Erase
~
~
~
~
~
~
Erase Suspend
Read
~
~
~
~
Enter Erase
Suspend Program
~
~
Erase
Suspend
Program
~
~
~
~
Resume
~
~
Erase Suspend
Read
~
~
~
~
Erase
Erase
~
~
~
~
Erase
Complete
~
~
I/O
2
and I/O6 toggle with OE and CE
Note : Both I/O6 and I/O2 toggle with OE or CE. See the text on I/O6 and I/O2 in the section "Write Operation Status" for
more information.
(November, 2007, Version 1.1) 40 AMIC Technology, Corp.
Page 42
A29L320A Series
Timing Waveforms for Alternate CE Controlled Write Operation
PA for program
SA for sector erase
555 for chip erase
t
AS
t
WH
t
CP
t
CPH
t
DS
t
DH
t
AH
t
BUSY
PD for program
30 for sector erase
10 for chip erase
Data Polling
~
~
~
~
~
~
~
~
t
WHWH1 or 2
~
~
~
~
~
~
PA
I/O
D
7
OUT
Addresses
WE
Data
RESET
OE
CE
t
RH
555 for program
2AA for erase
t
WC
t
WS
A0 for program
55 for erase
RY/BY
~
~
Note :
1. PA = Program Address, PD = Program Data, SA = Sector Address, I/O
2. Figure indicates the last two bus cycles of the command sequence.
7
= Complement of Data Input, D
OUT
= Array Data.
Erase and Programming Performance
Parameter Typ. (Note 1) Unit Comments
Sector Erase Time 0.7 sec
Chip Erase Time 45 sec
Byte Programming Time 6
Word Programming Time 9
μs
μs
Byte Mode 32 sec Chip Programming Time
(Note 2)
Word Mode 20 sec
Notes:
1. Typical program and erase times assume the following conditions: 25°C, 3.0V VCC, 100,000 cycles. Additionally,
programming typically assumes checkerboard pattern..
2. The typical chip programming time is considerably less than the ma ximum chip programming time listed, since most bytes
program faster than the maximum byte program time listed. If the maximum byte program time given is exc eeded, only then
does the device set I/O
5 = 1. See the section on I/O5 for further information.
3. In the pre-programming step of the Embedded Erase algorithm, all bytes are programmed to 00h befor e erasure.
4. System-level overhead is the time required to execute the four-bus-cycle comman d sequence for programming. See Table 9
for further information on command definitions.
5. The device has a guaranteed minimum erase and progra m cycle endurance of 100,000 cycles.
Excludes 00h programming prior to erasure
Excludes system-level overhead (Note 4)
(November, 2007, Version 1.1) 41 AMIC Technology, Corp.
Page 43
A29L320A Series
Latch-up Characteristics
Description Min. Max.
Input Voltage with respect to VSS on all I/O pins
-1.0V
VCC+1.0V
VCC Current
Input voltage with respect to VSS on all pins except I/O pins
(including A9, OEand
RESET
)
Includes all pins except VCC. Test conditions: VCC = 5.0V, one pin at time.
TSOP/TFBGA Pin Capacitance
Parameter Symbol
CIN Input Capacitance
COUT
CIN2Control Pin Capacitance
Notes:
1. Sampled, not 100% tested.
2. Test conditions TA = 25°C, f = 1.0MHz
Parameter Description
Output Capacitance
Test Setup
IN=0
V
V
OUT=0
V
IN=0
Data Retention
Parameter
Test Conditions
TSOP
TFBGA
TSOP
TFBGA
TSOP
TFBGA
-100 mA
-1.0V
Typ.
6
4.2
8.5
5.4
7.5
3.9
Min
Max.
7.5
5
12
6.5
9
4.7
+100 mA
12.5V
Unit
pF
pF
pF
pF
pF
pF
Unit
Minimum Pattern Data Retention Time
150°C
125°C
10 Years
20 Years
(November, 2007, Version 1.1) 42 AMIC Technology, Corp.
Page 44
A29L320A Series
Test Conditions
Test Specifications
Test Condition -70 -80 -90 -120 Unit
Output Load 1 TTL gate
Output Load Capacitance, CL(including jig capacitance) 30 100 100 100 pF
Input Rise and Fall Times 5 ns
Input Pulse Levels 0.0 – VCC V
Input timing measurement reference levels 0.5VCC V
Output timing measurement reference levels 0.5VCC V
Test Setup
3.0V
2.7 KW
Device
Under
Test
CL
Input Waveforms and Measurement Levels
VCC
Input0.5VCC0.5VCCOutput
0.0V
6.2 KW
Measurement Level
Diodes = IN3064 or Equival en t
(November, 2007, Version 1.1) 43 AMIC Technology, Corp.
Page 45
A29L320A Series
Ordering Information
Top Boot Sector Flash
Part No.
A29L320ATV-70 48Pin TSOP
A29L320ATV-70U 48Pin TSOP
A29L320ATV-70I 48Pin TSOP
A29L320ATV-70F 48 Pin Pb-Free TSOP
A29L320ATV-70UF 48 Pin Pb-Free TSOP
A29L320ATV-70IF 48 Pin Pb-Free TSOP
A29L320ATG-70 48 ball TFBGA
A29L320ATG-70U 48 ball TFBGA
A29L320ATG-70I 48 ball TFBGA
A29L320ATG-70F 48 ball Pb-Free TFBGA
A29L320ATG-70UF 48 ball Pb-Free TFBGA
Access Time
(ns)
70 10 20 0.5
Active Read
Current
Typ. (mA)
Program/Erase
Current
Typ. (mA)
Standby Current
Typ. (μA)
Package
A29L320ATG-70IF
A29L320ATV-80 48Pin TSOP
A29L320ATV-80U 48Pin TSOP
A29L320ATV-80I 48Pin TSOP
A29L320ATV-80F 48Pin Pb-Free TSOP
A29L320ATV-80UF 48Pin Pb-Free TSOP
A29L320ATV-80IF 48Pin Pb-Free T SOP
80 10 20 0.5
A29L320ATG-80 48 ball TFBGA
A29L320ATG-80U 48 ball TFBGA
A29L320ATG-80I 48 ball TFBGA
A29L320ATG-80F 48 ball Pb-Free TFBGA
A29L320ATG-80UF 48 ball Pb-Free TFBGA
A29L320ATG-80IF
48 ball Pb-Free TFBGA
48 ball Pb-Free TFBGA
Note: -U is for industrial operating temperature range: -40°C to +85°C
-I is for industrial operating temperature range: -25°C to +85°C
(November, 2007, Version 1.1) 44 AMIC Technology, Corp.
Page 46
A29L320A Series
Ordering Information (continued)
Top Boot Sector Flash
Part No.
A29L320ATV-90 48Pin TSOP
A29L320ATV-90U 48Pin TSOP
A29L320ATV-90I 48Pin TSOP
A29L320ATV-90F 48Pin Pb-Free TSOP
A29L320ATV-90UF 48Pin Pb-Free TSOP
A29L320ATV-90IF 48Pin Pb-Free T SOP
A29L320ATG-90 48 ball TFBGA
A29L320ATG-90U 48 ball TFBGA
A29L320ATG-90I 48 ball TFBGA
A29L320ATG-90F 48 ball Pb-Free TFBGA
A29L320ATG-90UF 48 ball Pb-Free TFBGA
Access Time
(ns)
90 10 20 0.5
Active Read
Current
Typ. (mA)
Program/Erase
Current
Typ. (mA)
Standby Current
Typ. (μA)
Package
A29L320ATG-90IF
A29L320ATV-120 48Pin TSOP
A29L320ATV-120U 48Pin TSOP
A29L320ATV-120I 48Pin TSOP
A29L320ATV-120F 48Pin Pb-Free TSOP
A29L320ATV-120UF 48Pin Pb-Free TSOP
A29L320ATV-120IF 48Pin Pb-Free TSOP
120 10 20 0.5
A29L320ATG-120 48 ball TFBGA
A29L320ATG-120U 48 ball TFBGA
A29L320ATG-120I 48 ball TFBGA
A29L320ATG-120F 48 ball Pb-Free TFBGA
A29L320ATG-120UF 48 ball Pb-Free TFBGA
A29L320ATG-120IF
48 ball Pb-Free TFBGA
48 ball Pb-Free TFBGA
Note: -U is for industrial operating temperature range: -40°C to +85°C
-I is for industrial operating temperature range: -25°C to +85°C
(November, 2007, Version 1.1) 45 AMIC Technology, Corp.
Page 47
A29L320A Series
Ordering Information (continued)
Bottom Boot Sector Flash
Part No.
A29L320AUV-70 48Pin TSOP
A29L320AUV-70U 48Pin TSOP
A29L320AUV-70I 48Pin TSOP
A29L320AUV-70F 48 Pin Pb-Free TSOP
A29L320AUV-70UF 48 Pin Pb-Free TSOP
A29L320AUV-70IF 48 Pin Pb-Free TSOP
A29L320AUG-70 48 ball TFBGA
A29L320AUG-70U 48 ball TFBGA
A29L320AUG-70I 48 ball TFBGA
A29L320AUG-70F 48 ball Pb-Free TFBGA
A29L320AUG-70UF 48 ball Pb-Free TFBGA
Access Time
(ns)
70 10 20 0.5
Active Read
Current
Typ. (mA)
Program/Erase
Current
Typ. (mA)
Standby Current
Typ. (μA)
Package
A29L320AUG-70IF
A29L320AUV-80 48Pin TSOP
A29L320AUV-80U 48Pin TSOP
A29L320AUV-80I 48Pin TSOP
A29L320AUV-80F 48Pin Pb-Free TSOP
A29L320AUV-80UF 48Pin Pb-Free TSOP
A29L320AUV-80IF 48Pin Pb-Free TSOP
80 10 20 0.5
A29L320AUG-80 48 ball TFBGA
A29L320AUG-80U 48 ball TFBGA
A29L320AUG-80I 48 ball TFBGA
A29L320AUG-80F 48 ball Pb-Free TFBGA
A29L320AUG-80UF 48 ball Pb-Free TFBGA
A29L320AUG-80IF
48 ball Pb-Free TFBGA
48 ball Pb-Free TFBGA
Note: -U is for industrial operating temperature range: -40°C to +85°C
-I is for industrial operating temperature range: -25°C to +85°C
(November, 2007, Version 1.1) 46 AMIC Technology, Corp.
Page 48
A29L320A Series
Ordering Information (continued)
Bottom Boot Sector Flash
Part No.
A29L320AUV-90 48Pin TSOP
A29L320AUV-90U 48Pin TSOP
A29L320AUV-90I 48Pin TSOP
A29L320AUV-90F 48Pin Pb-Free TSOP
A29L320AUV-90UF 48Pin Pb-Free TSOP
A29L320AUV-90IF 48Pin Pb-Free TSOP
A29L320AUG-90 48 ball TFBGA
A29L320AUG-90U 48 ball TFBGA
A29L320AUG-90I 48 ball TFBGA
A29L320AUG-90F 48 ball Pb-Free TFBGA
A29L320AUG-90UF 48 ball Pb-Free TFBGA
Access Time
(ns)
90 10 20 0.5
Active Read
Current
Typ. (mA)
Program/Erase
Current
Typ. (mA)
Standby Current
Typ. (μA)
Package
A29L320AUG-90IF
A29L320AUV-120 48Pin TSOP
A29L320AUV-120U 48Pin TSOP
A29L320AUV-120I 48Pin T SOP
A29L320AUV-120F 48Pin Pb-Free TSOP
A29L320AUV-120UF 48Pin Pb-Free TSOP
A29L320AUV-120IF 48Pin Pb-Free TSOP
120 10 20 0.5
A29L320AUG-120 48 ball TFBGA
A29L320AUG-120U 48 ball TFBGA
A29L320AUG-120I 48 ball TFBGA
A29L320AUG-120F 48 ball Pb-Free TFBGA
A29L320AUG-120UF 48 ball Pb-Free TFBGA
A29L320AUG-120IF
48 ball Pb-Free TFBGA
48 ball Pb-Free TFBGA
Note: -U is for industrial operating temperature range: -40°C to +85°C
-I is for industrial operating temperature range: -25°C to +85°C
(November, 2007, Version 1.1) 47 AMIC Technology, Corp.
Page 49
A29L320A Series
Package Information
TSOP 48L (Type I) Outline Dimensions