Features
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Single Voltage Read/Write Operation: 2.65V to 3.6V
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Fast Read Access Time – 70 ns
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Sector Erase Architecture
– Thirty-one 32K Word (64K Bytes) Sectors with Individual Write Lockout
– Eight 4K Word (8K Bytes) Sectors with Individual Write Lockout
Fast Word Program Time – 10 µs
Fast Sector Erase Time – 100 ms
Suspend/Resume Feature for Erase and Program
– Supports Reading and Programming from Any Sector by Suspending Erase
of a Different Sector
– Supports Reading Any Byte/Word in the Non-suspending Sectors by Suspending
Programming of Any Other Byte/Word
Low-power Operation
– 10 mA Active
– 15 µA Standby
Data Polling, Toggle Bit, Ready/Busy for End of Program Detection
RESET Input for Device Initialization
Sector Lockdown Support
TSOP and CBGA Package Options
Top or Bottom Boot Block Configuration Available
128-bit Protection Register
Minimum 100,000 Erase Cycles
Common Flash Interface (CFI)
Green (Pb/Halide-free) Packaging
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16-megabit
(1M x 16/2M x 8)
3-volt Only
Flash Memory
AT49BV163D
AT49BV163DT
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1. Description
The AT49BV163D(T) is a 2.7-volt 16-megabit Flash memory organized as 1,048,576
words of 16 bits each or 2,097,152 bytes of 8 bits each. The x16 data appears on I/O0
- I/O15; the x8 data appears on I/O0 - I/O7. The memory is divided into 39 sectors for
erase operations. The device is offered in a 48-lead TSOP and a 48-ball CBGA pack-
age. The device has CE and OE control signals to avoid any bus contention. This
device can be read or reprogrammed using a single power supply, making it ideally
suited for in-system programming.
The device powers on in the read mode. Command sequences are used to place the
device in other operation modes such as program and erase. The device has the
capability to protect the data in any sector (see
“Sector Lockdown” on page 5).
To increase the flexibility of the device, it contains an Erase Suspend and Program
Suspend feature. This feature will put the erase or program on hold for any amount of
time and let the user read data from or program data to any of the remaining sectors
within the memory. The end of a program or an erase cycle is detected by the
READY/BUSY pin, Data Polling or by the toggle bit.
A six-byte command (Enter Single Pulse Program Mode) sequence to remove
the requirement of entering the three-byte program sequence is offered to further
improve programming time. After entering the six-byte code, only single pulses on the
write control lines are required for writing into the device. This mode (Single
Pulse Byte/Word Program) is exited by powering down the device, or by pulsing
the RESET pin low for a minimum of 500 ns and then bringing it back to V
CC
. Erase,
3590A–FLASH–12/05
Erase Suspend/Resume and Program Suspend/Resume commands will not work while in this
mode; if entered they will result in data being programmed into the device. It is not recom-
mended that the six-byte code reside in the software of the final product but only exist in external
programming code.
The BYTE pin controls whether the device data I/O pins operate in the byte or word configura-
tion. If the BYTE pin is set at logic “1”, the device is in word configuration, I/O0 - I/O15 are active
and controlled by CE and OE.
If the BYTE pin is set at logic “0”, the device is in byte configuration, and only data I/O pins I/O0 -
I/O7 are active and controlled by CE and OE. The data I/O pins I/O8 - I/O14 are tri-stated, and
the I/O15 pin is used as an input for the LSB (A-1) address function.
2. Pin Configurations
Pin Name
A0 - A19
CE
OE
WE
RESET
RDY/BUSY
I/O0 - I/O14
I/O15 (A-1)
BYTE
NC
Function
Addresses
Chip Enable
Output Enable
Write Enable
Reset
READY/BUSY Output
Data Inputs/Outputs
I/O15 (Data Input/Output, Word Mode)
A-1 (LSB Address Input, Byte Mode)
Selects Byte or Word Mode
No Connect
2.1
48-lead TSOP (Type 1) Top View
A15
A14
A13
A12
A11
A10
A9
A8
A19
NC
WE
RESET
NC
NC
RDY/BUSY
A18
A17
A7
A6
A5
A4
A3
A2
A1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
A16
BYTE
GND
I/O15/A-1
I/O7
I/O14
I/O6
I/O13
I/O5
I/O12
I/O4
VCC
I/O11
I/O3
I/O10
I/O2
I/O9
I/O1
I/O8
I/O0
OE
GND
CE
A0
2.2
48-ball CBGA Top View (Ball Down)
1
2
3
4
5
6
A
A3
A7
RDY/BUSY
WE
A9
A13
B
A4
A17
NC
RST
A8
A12
C
A2
A6
A18
NC
A10
A14
D
A1
A5
NC
A19
A11
A15
E
A0
I/O0
I/O2
I/O5
I/O7
A16
F
CE
I/O8
I/O10
I/O12
I/O14
BYTE
G
OE
I/O9
I/O11
VCC
I/O13
I/015/A-1
H
VSS
I/O1
I/O3
I/O4
I/O6
VSS
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AT49BV163D(T)
3590A–FLASH–12/05
AT49BV163D(T)
3. Block Diagram
I/O0 - I/O15/A-1
OUTPUT
BUFFER
INPUT
BUFFER
OUTPUT
MULTIPLEXER
A0 - A19
INPUT
BUFFER
DATA
REGISTER
IDENTIFIER
REGISTER
STATUS
REGISTER
COMMAND
REGISTER
ADDRESS
LATCH
DATA
COMPARATOR
CE
WE
OE
RESET
BYTE
RDY/BUSY
WRITE STATE
MACHINE
Y-DECODER
Y-GATING
PROGRAM/ERASE
VOLTAGE SWITCH
VCC
GND
X-DECODER
MAIN
MEMORY
4. Device Operation
4.1
Command Sequences
When the device is first powered on, it will be reset to the read or standby mode, depending
upon the state of the control line inputs. In order to perform other device functions, a series of
command sequences are entered into the device. The command sequences are shown in the
“Command Definition Table” on page 11
(I/O8 - I/O15 are don’t care inputs for the command
codes). The command sequences are written by applying a low pulse on the WE or CE input
with CE or WE low (respectively) and OE high. The address is latched on the falling edge of CE
or WE, whichever occurs last. The data is latched by the first rising edge of CE or WE. Standard
microprocessor write timings are used. The address locations used in the command sequences
are not affected by entering the command sequences.
4.2
Read
The AT49BV163D(T) is accessed like an EPROM. When CE and OE are low and WE is high,
the data stored at the memory location determined by the address pins are asserted on the
out-puts. The outputs are put in the high impedance state whenever CE or OE is high. This dual-
line control gives designers flexibility in preventing bus contention.
4.3
Reset
A RESET input pin is provided to ease some system applications. When RESET is at a logic
high level, the device is in its standard operating mode. A low level on the RESET input halts the
present device operation and puts the outputs of the device in a high impedance state. When a
high level is reasserted on the RESET pin, the device returns to the read or standby mode,
depending upon the state of the control inputs.
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3590A–FLASH–12/05
4.4
Erase
Before a byte/word can be reprogrammed, it must be erased. The erased state of memory bits is
a logical “1”. The entire device can be erased by using the Chip Erase command or individual
sectors can be erased by using the Sector Erase command.
4.4.1
Chip Erase
The entire device can be erased at one time by using the six-byte chip erase software code.
After the chip erase has been initiated, the device will internally time the erase operation so that
no external clocks are required. The maximum time to erase the chip is t
EC
.
If the sector lockdown has been enabled, the chip erase will not erase the data in the sector that
has been locked out; it will erase only the unprotected sectors. After the chip erase, the device
will return to the read or standby mode.
4.4.2
Sector Erase
As an alternative to a full chip erase, the device is organized into 39 sectors (SA0 - SA38) that
can be individually erased. The Sector Erase command is a six-bus cycle operation. The sector
address is latched on the falling WE edge of the sixth cycle while the 30H data input command is
latched on the rising edge of WE. The sector erase starts after the rising edge of WE of the sixth
cycle. The erase operation is internally controlled; it will automatically time to completion. The
maximum time to erase a sector is t
SEC
. When the sector programming lockdown feature is not
enabled, the sector will erase (from the same Sector Erase command). An attempt to erase a
sector that has been protected will result in the operation terminating immediately.
4.5
Byte/Word Programming
Once a memory block is erased, it is programmed (to a logical “0”) on a byte-by-byte or on a
word-by-word basis. Programming is accomplished via the internal device command register
and is a four-bus cycle operation. The device will automatically generate the required internal
program pulses.
Any commands written to the chip during the embedded programming cycle will be ignored. If a
hardware reset happens during programming, the data at the location being programmed will be
corrupted. Please note that a data “0” cannot be programmed back to a “1”; only erase opera-
tions can convert “0”s to “1”s. Programming is completed after the specified t
BP
cycle time. The
Data Polling feature or the Toggle Bit feature may be used to indicate the end of a program
cycle. If the erase/program status bit is a “1”, the device was not able to verify that the erase or
program operation was performed successfully.
4.6
Program/Erase Status
The device provides several bits to determine the status of a program or erase operation: I/O2,
I/O5, I/O6 and I/O7. The
“Status Bit Table” on page 10
and the following four sections describe
the function of these bits. To provide greater flexibility for system designers, the
AT49BV163D(T) contains a programmable configuration register. The configuration register
allows the user to specify the status bit operation. The configuration register can be set to one of
two different values, “00” or “01”. If the configuration register is set to “00”, the part will automati-
cally return to the read mode after a successful program or erase operation. If the configuration
register is set to a “01”, a Product ID Exit command must be given after a successful program or
erase operation before the part will return to the read mode. It is important to note that whether
the configuration register is set to a “00” or to a “01”, any unsuccessful program or erase opera-
tion requires using the Product ID Exit command to return the device to read mode. The default
value (after power-up) for the configuration register is “00”. Using the four-bus cycle Set Config-
uration Register command as shown in the
“Command Definition Table” on page 11,
the value
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AT49BV163D(T)
3590A–FLASH–12/05
AT49BV163D(T)
of the configuration register can be changed. Voltages applied to the RESET pin will not alter the
value of the configuration register. The value of the configuration register will affect the operation
of the I/O7 status bit as described below.
4.6.1
DATA Polling
The AT49BV163D(T) features Data Polling to indicate the end of a program cycle. If the status
configuration register is set to a “00”, during a program cycle an attempted read of the last
byte/word loaded will result in the complement of the loaded data on I/O7. Once the program
cycle has been completed, true data is valid on all outputs and the next cycle may begin. During
a chip or sector erase operation, an attempt to read the device will give a “0” on I/O7. Once the
program or erase cycle has completed, true data will be read from the device. Data Polling may
begin at any time during the program cycle. Please see
“Status Bit Table” on page 10
for more
details.
If the status bit configuration register is set to a “01”, the I/O7 status bit will be low while the
device is actively programming or erasing data. I/O7 will go high when the device has completed
a program or erase operation. Once I/O7 has gone high, status information on the other pins can
be checked.
The Data Polling status bit must be used in conjunction with the erase/program status bit as
shown in the algorithm in
Figures 4-1 and
and
4-2
on
page 8.
4.6.2
Toggle Bit
In addition to Data Polling the AT49BV163D(T) provides another method for determining the end
of a program or erase cycle. During a program or erase operation, successive attempts to read
data from the memory will result in I/O6 toggling between one and zero. Once the program cycle
has completed, I/O6 will stop toggling and valid data will be read. Examining the toggle bit may
begin at any time during a program cycle. Please see
“Status Bit Table” on page 10
for more
details.
The toggle bit status bit should be used in conjunction with the erase/program status bit as
shown in the algorithm in
Figures 4-3 and
and
4-4
on
page 9.
4.6.3
Erase/Program Status Bit
The device offers a status bit on I/O5, which indicates whether the program or erase operation
has exceeded a specified internal pulse count limit. If the status bit is a “1”, the device is unable
to verify that an erase or a byte/word program operation has been successfully performed. If a
program (Sector Erase) command is issued to a protected sector, the protected sector will not
be programmed (erased). The device will go to a status read mode and the I/O5 status bit will be
set high, indicating the program (erase) operation did not complete as requested. Once the
erase/program status bit has been set to a “1”, the system must write the Product ID Exit com-
mand to return to the read mode. The erase/program status bit is a “0” while the erase or
program operation is still in progress. Please see
“Status Bit Table” on page 10
for more details.
4.7
Sector Lockdown
Each sector has a programming lockdown feature. This feature prevents programming of data in
the designated sectors once the feature has been enabled. These sectors can contain secure
code that is used to bring up the system. Enabling the lockdown feature will allow the boot code
to stay in the device while data in the rest of the device is updated. This feature does not have to
be activated; any sector’s usage as a write-protected region is optional to the user.
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3590A–FLASH–12/05
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