E2D0095-19-22
¡ Semiconductor
MSM9894AL
¡ Semiconductor
8M-bit Serial Voice Flash Memory
This version: Feb. 1999
MSM9894AL
GENERAL DESCRIPTION
The MSM9894AL is a 8Mb flash memory that operates at 2.7 V to 3.6 V. Since backup is not
needed, the number of pins is small, and the chip is contained in a small-package 32-pin TSOP,
the MSM9894AL is a flash memory suitable for applications such as handy terminals. In
combination with Oki's recording/playback IC (MSM9888L/MSM9889L), a solid-state recording/
playback system can be easily constructed.
FEATURES
• Small page size
(one time write unit)
• Configuration
• Power supply voltage
• Operating current
: 2,112 bits per page
: 4096 pages
¥
2112 bits
: Single 2.7 to 3.6 V
: Supply current : Up to 35 mA
: Stanby current : Up to 10
mA
• Operating temperature : –10 to +70°C
• Write Cycles
: 10,000 cycles per page
• Package:
32-pin plastic TSOP (TSOPI32-P-820-0.50-K) (Product name: MSM9894ALTS-KT)
PIN CONFIGURATION (TOP VIEW)
TEST
RESET
PRT
NC
NC
NC
V
DD
GND
NC
NC
NC
NC
CS
SCK
DI
DO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC
NC: No connection
28-Pin Plastic TSOP
NC : No connection
32-Pin Plastic TSOP
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¡ Semiconductor
MSM9894AL
PIN DESCRIPTIONS
Pin
15
16
14
13
1
3
2
7
8
Symbol
DI
DO
SCK
CS
TEST
PRT
RESET
V
DD
GND
I/O
I
O
I
I
O
I
I
I
I
Data output pin.
Inputs the data transfer clock for the DI and DO pins.
The device accepts the SCK pulse when
CS
is at "L" level and does not accept the
SCK pulse when
CS
is at "H" level.
Output pin for test. Leave this pin open.
Prohibits flash memory programming at "L" level.
The device is reset when
RESET
is at "L" level.
Power supply pin (2.7 to 3.6 V)
GND pin (0 V)
Description
Command, address, or data input pin.
ABSOLUTE MAXIMUM RATINGS
Parameter
Power Supply Voltage
Input Voltage
Storage Temperature
Symbol
V
DD
V
IN
T
STG
Condition
Ta=25°C
Ta=25°C
—
Rating
–0.3 to +7.0
–0.6 to V
DD
+0.6
–55 to +150
Unit
V
V
°C
RECOMMENDED OPERATING CONDITIONS
Parameter
Power Supply Voltage
Operating Temperature
Symbol
V
DD
T
op
Condition
GND=0V
—
Range
2.7 to 3.6
–10 to +70
Unit
V
°C
ELECTRICAL CHARACTERISTICS
DC Characteristics
Parameter
Operating Current
Standby Current
Input Leackage Current
Output Leackage Current
Input Low Voltage
Input High Voltage
Output Low Voltage
Output High Voltage
Symbol
I
CC
I
SB
I
IL
I
OL
V
IL
V
IH
V
OL
V
OH
Min.
—
—
—
—
—
2.0
—
2.0
Typ.
15
—
—
—
—
—
—
—
Max.
35
10
1
1
0.6
—
0.4
—
Unit.
mA
mA
mA
mA
V
V
V
V
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¡ Semiconductor
MSM9894AL
PROGRAMMING/ERASE CHARACTERISTICS
Parameter
Erase/Programming Cycle
Data Retention Time
Write Disturb *1)
Symbol
C
EP
T
DR
C
PD
Condition
—
—
Bit error : non
Bit error : 1bit
Bit error : 3bits
Min.
—
—
—
—
—
Typ.
—
—
—
—
—
Max.
10,000
10
20,000
50,000
100,000
Unit
Cycles
Years
Cycles
Cycles
Cycles
*1)
"Write Disturb" means a phenomenon that frequent write cycles executed to pages in
Flash memory may cause a data error in another page to which write operations are not
performed.
For example, 20,001 to 50,000 write operations performed to pages other than page "n"
may cause a 1-bit error in page "n".
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¡ Semiconductor
MSM9894AL
APPLICATION CIRCUIT
DV
DD
DI
DO
SCK
AV
DD
FDI
FDO
FSCK
FCS
DI
DO
SCK
CS
RESET
PRT
MCU
CS
MSM9888L/9889L
RESET
BUSY
MON
FRESET
FPRT
MSC1157
AOUT
SG
+
LIN
Voice input
LOUT
AMON
FIN
FOUT
ADIN
XT
XT
TEST0
TEST1
TEST2
DGND
AGND
MSM9894AL
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¡ Semiconductor
MSM9894AL
WRITE DISTURB
"Write Distrub" means a phenomenon that the change from digital "0" to "1" may occur in a Flash
memory page to which data is scarcely written.
The above change can be avoided by refreshing Flash memory data with the DTRW command
and WEND command of the MSM9888L/MSM9889L.
q
DTRW command
This command moves some Flash memory
page data to buffer.
Buffer
Flash
Page "n"
w
WEND command
This command programs buffer data to
Flash memory.
Buffer
Flash
Page "n"
TIMING WHEN POWER IS ON
Refer to the MSM9888L/MSM9889L Data Sheet. If the timing diagrams descrided in the
MSM9888L/MSM9889L Data Sheet are not satisfied, errors such as "Recording is disabled" or
"Recorded message is erased" may occur.
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