The W49F102 is a 1-megabit, 5-volt only CMOS flash memory organized as 64K × 16 bits. The device
can be programmed and erased in-system with a standard 5V power supply. A 12-volt VPP is not
required. The unique cell architecture of the W49F102 results in fast program/erase operations with
extremely low current consumption (compared to other comparable 5-volt flash memory products). The
device can also be programmed and erased using standard EPROM programmers.
FEATURES
• Single 5-volt operations:
− 5-volt Read
− 5-volt Erase
− 5-volt Program
• Fast Program operation:
− Word-by-Word programming: 50 µS (max.)
• Fast Erase operation: 100 mS (typ.)
• Fast Read access time: 40/45 nS
• Endurance: 10K cycles (typ.)
• Ten-year data retention
• Hardware data protection
• 8K word Boot Block with Lockout protection
• Low power consumption
− Active current: 25 mA (typ.)
− Standby current: 20 µA (typ.)
• Automatic program and erase timing with
internal VPP generation
• End of program or erase detection
− Toggle bit
− Data polling
• Latched address and data
• TTL compatible I/O
• JEDEC standard word-wide pinouts
• Available packages: 40-pin TSOP and 44-pin
PLCC
Publication Release Date: October 2000
- 1 - Revision A3
Page 2
W49F102
CE
OE
WE
PIN CONFIGURATIONS
A9
A10
A11
A12
A13
A14
A15
NC
WE
V
NC
CE
DQ15
DQ14
DQ13
DQ12
DQ11
DQ10
DQ9
DQ8
The read operation of the W49F102 is controlled by CE and OE, both of which have to be low for
the host to obtain data from the outputs. CE is used for device selection. When CE is high, the
chip is de-selected and only standby power will be consumed. OE is the output control and is used
to gate data from the output pins. The data bus is in high impedance state when either CE or OE
is high. Refer to the timing waveforms for further details.
Boot Block Operation
There is one 8K-word boot block in this device, which can be used to store boot code. It is located in
the first 8K words of the memory with the address range from 0000 hex to 1FFF hex.
See Command Codes for Boot Block Lockout Enable for the specific code. Once this feature is set the
data for the designated block cannot be erased or programmed (programming lockout); other memory
locations can be changed by the regular programming method. Once the boot block programming
lockout feature is activated, the chip erase function will only affect the main memory.
In order to detect whether the boot block feature is set on the 8K-words block, users can perform
software command sequence: enter the product identification mode (see Command Codes for
Identification/Boot Block Lockout Detection for specific code), and then read from address "0002 hex".
If the output data is "FF hex," the boot block programming lockout feature is activated; if the output
data is "FE hex," the lockout feature is inactivated and the block can be erased/programmed.
To return to normal operation, perform a three-byte command sequence (or an alternate single-word
command) to exit the identification mode. For the specific code, see Command Codes for
Identification/Boot Block Lockout Detection.
Chip Erase Operation
The chip-erase mode can be initiated by a six-word command sequence. After the command loading
cycle, the device enters the internal chip erase mode, which is automatically timed and will be
completed in a fast 100 mS (typical). The host system is not required to provide any control or timing
during this operation. If the boot block programming lockout is activated, only the data in the main
memory will be erased to FF(hex), and the data in the boot block will not be erased (remains same as
before the chip erase operation). The entire memory array (main memory and boot block) will be
erased to FF(hex). by the chip erase operation if the boot block programming lockout feature is not
activated. The device will automatically return to normal read mode after the erase operation
completed. Data polling and/or Toggle Bits can be used to detect end of erase cycle.
Main Memory Erase Operation
The main memory erase mode can be initiated by a six-word command sequence. After the command
loading cycle, the device enters the internal main-memory erase mode, which is automatically timed
and will be completed in a fast 100 mS (typical). The host system is not required to provide any control
or timing during this operation. The device will automatically return to normal read mode after the erase
operation completed. Data polling and/or Toggle Bits can be used to detect end of erase cycle.
Publication Release Date: October 2000
- 3 - Revision A3
Page 4
W49F102
WE
Program Operation
The W49F102 is programmed on a word-by-word basis. Program operation can only change logical
data "1" to logical data "0" The erase operation (changed entire data in main memory and/or boot block
from "0" to "1" is needed before programming.
The program operation is initiated by a 4-word command cycle (see Command Codes for Word
Programming). The device will internally enter the program operation immediately after the wordprogram command is entered. The internal program timer will automatically time-out (50 µS max. TBP) once completed and return to normal read mode. Data polling and/or Toggle Bits can be used to
detect end of program cycle.
Hardware Data Protection
The integrity of the data stored in the W49F102 is also hardware protected in the following ways:
(1) Noise/Glitch Protection: A WE pulse of less than 15 nS in duration will not initiate a write cycle.
(2) VDD Power Up/Down Detection: The programming operation is inhibited when VDD is less than
2.5V typical.
(3) Write Inhibit Mode: Forcing OE low, CE high, or WE high will inhibit the write operation.
This prevents inadvertent writes during power-up or power-down periods.
(4) VDD power-on delay: When VDD has reached its sense level, the device will automatically time-out
5 mS before any write (erase/program) operation.
Data Polling (DQ7 & DQ15)- Write Status Detection
The W49F102 includes a data polling feature to indicate the end of a program or erase cycle.
When the W49F102 is in the internal program or erase cycle, any attempt to read DQ7 or DQ15 of the
last word loaded will receive the complement of the true data. Once the program or erase cycle is
completed, DQ7 or DQ15 will show the true data. Note that DQ7 or DQ15 will show logical "0" during the
erase cycle, and become logical "1" or true data when the erase cycle has been completed.
Toggle Bit (DQ6 & DQ14)- Write Status Detection
In addition to data polling, the W49F102 provides another method for determining the end of a
program cycle. During the internal program or erase cycle, any consecutive attempts to read DQ6 or
DQ14 will produce alternating 0's and 1's. When the program or erase cycle is completed, this toggling
between 0's and 1's will stop. The device is then ready for the next operation.
Product Identification
The product ID operation outputs the manufacturer code and device code. Programming equipment
automatically matches the device with its proper erase and programming algorithms.
The manufacturer and device codes can be accessed by software or hardware operation. In the
software access mode, a six-word (or JEDEC 3-word) command sequence can be used to access the
product ID. A read from address 0000H outputs the manufacturer code (00DAh). A read from address
0001H outputs the device code (002Fh). The product ID operation can be terminated by a three-word
command sequence or an alternate one-word command sequence (see Command Definition table).
In the hardware access mode, access to the product ID is activated by forcing CE and OE low,
high, and raising A9 to 12 volts.
- 4 -
Page 5
TABLE OF OPERATING MODES
CE OE WE
5555
2AAA
5555
5555
2AAA
5555
5555
2AAA
5555
5555
2AAA
5555
5555
2AAA
5555
5555
2AAA
5555
5555
2AAA
5555
5555
2AAA
5555
5555
2AAA
5555
Operating Mode Selection
(VHH = 12V ± 5%)
MODE PINS
W49F102
ADDRESS DQ.
Read VIL VIL VIH AINDout
Write VIL VIH VIL AINDin
Standby VIH X X X High Z
Write Inhibit X VIL X X High Z/DOUTX X VIH X High Z/DOUT
Output Disable X VIH X X High Z
Product ID VIL VIL VIH
Software Product Identification and Boot Block Lockout Detection Acquisition Flow
Product
Identification
Entry (1)
Load data AA
to
address 5555
Load data 55
to
address 2AAA
Product
Identification
and Boot Block
Lockout Detection
Mode (3)
Read address = 00000
data = DA
(2)
Product
Identification Exit (6)
Load data AA
to
address 5555
Load data 55
to
address 2AAA
Load data 90
to
address 5555
Pause 10 S
µ
Read address = 00001
data = 2F
Read address = 00002
data = FF/FE
(2)
(4)
Load data F0
to
address 5555
Pause 10 S
Normal Mode
µ
Notes for software product identification/boot block lockout detection:
(1) Data Format: DQ15-DQ8 (Don't Care), DQ7−DQ0 (Hex); Address Format: A14−A0 (Hex)
(2) A1−A15 = VIL; manufacture code is read for A0 = VIL; device code is read for A0 = VIH.
(3) The device does not remain in identification and boot block lockout detection mode if power down.
(4) If the output data is "FF Hex," the boot block programming lockout feature is activated; if the output data "FE Hex," the lockout feature is
inactivated and the block can be programmed.
(5) The device returns to standard operation mode.
(6) Optional 1-write cycle (write F0 hex at XXXX address) can be used to exit the product identification/boot block lockout detection.
OE
OE High Hold Time
CE Pulse Width
CE High Width
WE Pulse Width
High Width
WE
Data Setup Time TDS45
Data Hold Time TDH0
Word Programming Time TBP
Erase Cycle Time TEC
Note: All AC timing signals observe the following guidelines for determining setup and hold times:
(a) High level signal's reference level is VIH and (b) low level signal's reference level is VIL.
MIN. MAX. MIN. MAX.
MIN.TYP.MAX.UNIT
- -
- -
TCS0
TCH0
TOES0
TOEH0
TCP50
TCPH50
TWP45
TWPH45
- -
- -
- -
- -
- -
- -
- -
- -
- -
- -
-
-
1050
0.11Sec.
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
nS
µS
Publication Release Date: October 2000
- 13 - Revision A3
Page 14
AC Characteristics, continued
OE
CE
OE
CE
Address A15-0
Data Polling and Toggle Bit Timing Parameters
PARAMETER SYM. W49F102-40 W49F102-45 UNIT
to Data Polling Output Delayto Data Polling Output Delayto Toggle Bit Output Delayto Toggle Bit Output Delay
TOEP
TCEP
TOET
TCET
MIN. MAX. MIN. MAX.
- 20 25 nS
- 40 - 45 nS
- 20 - 25 nS
- 40 - 45 nS
TIMING WAVEFORMS
Read Cycle Timing Diagram
W49F102
CE
OE
WE
DQ15-0
High-Z
T
RC
T
CE
T
OE
T
V
IH
TOLZ
T
CLZ
T
Data Valid
OH
T
CHZ
Data Valid
AA
T
OHZ
High-Z
- 14 -
Page 15
Timing Waveforms, continued
WE
CE
Controlled Command Write Cycle Timing Diagram
W49F102
Address A15-0
CE
OE
WE
DQ15-0
T
AS
T
CS
T
OES
T
AH
T
WP
T
Data Valid
Controlled Command Write Cycle Timing Diagram
AS
T
TAH
T
CH
T
OEH
T
WPH
DS
T
DH
Address A15-0
T
T
T
OEH
DH
CPH
CE
OE
WE
DQ15-0
High Z
T
CP
T
OES
T
DS
Data Valid
Publication Release Date: October 2000
- 15 - Revision A3
Page 16
Timing Waveforms, continued
DATA
Program Cycle Timing Diagram
W49F102
Word Program Cycle
Address A15-0
DQ15-0
CE
OE
WE
5555
WP
T
Word 0
AA
Polling Timing Diagram
Address A15-0
T
WPH
Word 1
55552AAA
Word 2
Address
A055
Data-In
Word 3
BP
T
Internal Write Start
WE
T
CEP
CE
T
OEH
OE
T
OEP
DQ7/DQ15
X
X
T
BP or
- 16 -
T
OES
X
T
EC
X
Page 17
Timing Waveforms, continued
Six-word code for Boot Block
Toggle Bit Timing Diagram
Address A15-0
WE
CE
OE
DQ6/DQ14
TOEH
T
BP orTEC
W49F102
T
OES
Boot Block Lockout Enable Timing Diagram
Lockout Feature Enable
Address A15-0
DQ15-0
CE
OE
WE
5555
XXAA
WP
T
SW0
T
2AAA
WPH
XX55
SW1
5555
XX80
SW23
55552AAA
XXAA
SW3
XX55
SW4
5555
XX40
SW5
WC
T
- 17 - Revision A3
Publication Release Date: October 2000
Page 18
Timing Waveforms, continued
Six-word code for 5V-only software
Chip Erase Timing Diagram
W49F102
Six-word code for 5V-only software
chip erase
Address A15-0
DQ15-0
CE
OE
WE
5555
XXAA
T
WP
SW0
T
2AAA
XX55
WPH
SW1
Main Memory Erase Timing Diagram
Main Memory Erase
Address A15-0
5555
2AAA
5555
XX80
SW2
5555
55552AAA
XXAA
SW3
55552AAA
XX55
SW4
5555
SW5
5555
XX10
Internal Erase starts
T
EC
- 18 -
DQ15-0
CE
OE
WE
XXAA
T
WP
SW0
T
WPH
XX55
SW1
XX80
SW2
XXAA
SW3
XX55
SW4
XX30
Internal Erase starts
SW5
T
EC
Page 19
ORDERING INFORMATION
S)
W49F102
Notes:
1. Winbond reserves the right to make changes to its products without prior notice.
2. Purchasers are responsible for performing appropriate quality assurance testing on products intended for use in
applications where personal injury might occur as a consequence of product failure.