OKI Semiconductor
FEDL2500BFULL-02
Issue Date: Aug.9, 2004
ML2500BTA
Analog-Storage Single-chip Record/Playback LSI with 1M Bit-Cell Flash Memory
1/27
GENERAL DESCRIPTION
Thanks to newly developed Analog Multi-Level Storage technology, ML2500B stores non-compressed analog
source signal directly into on-chip 1M Bit-Cell Flash memory. The result is superb sound quality without noise
and distortions introduced through coding/decoding, and impressive long-time record/playback capability up to
256 sec. ML2500B is fully controllable by an external MCU via the industry's standard Serial Peripheral
Interface.
In addition, no backup requirement and low operating voltage (2.7 to 3.3 V) make the LSI an ideal choice for
compact, handy and portable terminals. ML2500B is a true single-chip solution to record/playback subsystem for
use with today's size-critical electronic products.
DIFFERENCES BETWEEN THE ML2500BTA AND THE ML2500TA
ML2500BTA
ML2500TA
Operating Temperature
Ta = 40 to +70C
Ta = 10 to +70C
Pin Symbol
Pin 10: TEST2
Pin 10: NC
AC Characteristic
DI hold time t
DIH
= 30 ns
DI hold time t
DIH
= 20 ns
FEATURES
On-chip non-volatile 1M bit-cell Flash memory
Program/Erase Cycles:
10,000 cycles
Data Retention
:
10 years
MCU Interface
Serial Peripheral Interface (SPI; Mode 0)
Record/Playback Time Length (With the int. Osc. or ext. clock at 8.192 MHz)
Approx. 160 sec (At fsam = 6.4 kHz)
Approx. 190 sec (At fsam = 5.3 kHz)
Approx. 256 sec (At fsam = 4.0 kHz)
Selectable Sampling Frequencies
4.0 kHz, 5.3 kHz, 6.4 kHz
Maximum number of recording phrases: 320 phrases
Phrase Control
Fully controllable with user-definable Start, Stop addresses
Built-in LPF/Smoothing Filter (LPF attenuation 40 dB/oct)
Built-in Oscillation Circuit (8.192 MHz), No oscillator required
Optional external clock input (Clock Frequency 4.0 to 8.192 MHz)
Power Supply
:
2.7 to 3.3 V
Operating Temperature:
40 to +70C (guaranteed for both function and voice quality)
40 to +85C (guaranteed for function only) *Notice
*Notice
The voice quality can deteriorate at temperatures beyond the range of 40 to +70C.
DC and AC characteristics in this data sheet are specified for 40 to +70C operating temperature range.
Package:
32-pin Plastic TSOP (TSOP(1)32-P-814-0.50-1K) (Product name: ML2500BTA)
Note: Please contact the Oki Sales office/Distributors for bare chips.
FEDL2500BFULL-02
OKI Semiconductor
ML2500BTA
2/27
CONTENTS
GENERAL DESCRIPTION ................................................................................................................................... 1
FEATURES ............................................................................................................................................................ 1
BLOCK DIAGRAM ............................................................................................................................................... 3
PIN CONFIGURATION ........................................................................................................................................ 3
PIN DESCRIPTIONS ............................................................................................................................................. 4
ABSOLUTE MAXIMUM RATINGS.................................................................................................................... 5
RECOMMENDED OPERATING CONDITIONS................................................................................................. 5
ELECTRICAL CHARACTERISTICS ................................................................................................................... 5
DC Characteristics............................................................................................................................................. 5
Analog Characteristics ...................................................................................................................................... 6
AC Characteristics 1.......................................................................................................................................... 7
AC Characteristics 2.......................................................................................................................................... 8
TIMING DIAGRAM .............................................................................................................................................. 8
Serial Peripheral Interface (SPI) AC Characteristics Timing Chart .................................................................. 8
Operational Timing at Power-On ...................................................................................................................... 9
Timing for Power Up and Power Down Operations.......................................................................................... 9
Timing for Record/Playback Operation .......................................................................................................... 10
1. Timing for Recording Operation.......................................................................................................... 10
2. Timing for Playback Operation............................................................................................................ 11
3. Timing for Pausing Operation by the PAUSE Command.................................................................... 12
FUNCTIONAL DESCRIPTION .......................................................................................................................... 14
Serial Peripheral Interface (SPI)...................................................................................................................... 14
1. Timing for Writing Command Data..................................................................................................... 14
2. Timings for Reading out Status Data ................................................................................................... 15
Control Commands.......................................................................................................................................... 16
1. Control Commands-Recording ............................................................................................................ 16
2. Control Commands-Playback .............................................................................................................. 18
3. The List of Control Commands............................................................................................................ 19
Addressable Memory Space for Recording..................................................................................................... 20
Address Control............................................................................................................................................... 21
1. Address Control for Recording ............................................................................................................ 21
2. Address Control for Playback .............................................................................................................. 21
LPF Cheracteristics ......................................................................................................................................... 22
Power Supply Circuit Design .......................................................................................................................... 22
LOUT Output Voltage Range Allowance ....................................................................................................... 23
States of Output Pins during Power Down...................................................................................................... 23
APPLICATION CIRCUITS ................................................................................................................................. 24
PACKAGE DIMENSIONS .................................................................................................................................. 25
FEDL2500BFULL-02
OKI Semiconductor
ML2500BTA
3/27
BLOCK DIAGRAM
PIN CONFIGURATION (TOP VIEW)
NC: No connection. Keep NC pins open.
32-Pin Plastic TSOP (Type 1)
DV
DD
1
32
AV
DD
RESET
2
31
LIN
CS
3
30
LOUT
SCK
4
29
TEST2
DI
5
28
TEST2
DO
6
27
AOUT
MON
7
26
SG
EXTCLK
8
25
NC
NC
9
24
TEST1
TEST2
10
23
NC
TEST2
11
22
TEST2
NC
12
21
NC
ROSC
15
18
TEST2
DGND
16
17
AGND
TEST2
13
20
TEST2
NC
14
19
NC
LOUT
EXTCLK
LIN
ROSC
AV
DD
AOUT
AGND
RESET
SG
SG
Analog Write & Read Circuits
1M Bit Cell
Analog Storage Flash
Memory Array
Address Decoder
MUX
Serial Peripheral Interface & Controller
CS SCK
DI
DO
MON
DV
DD
DGND
TEST1
LPF
Internal
Oscillator
Power
Supplies
+
+
TEST2
FEDL2500BFULL-02
OKI Semiconductor
ML2500BTA
4/27
PIN DESCRIPTIONS
Pin Symbol
Type
Description
5
Dl
l
Serial input pin for command data.
6
DO
O
Serial output pin for status data.
4
SCK
l
Shift clock input pin for the Dl and the DO pins.
3
CS l
Chip select pin. "L" level input enables data input/output through the serial
interface.
2
RESET l
RESET input pin, resetting the serial interface circuit only. "L" level input to
this pin initializes the serial interface. Must input "L" pulse after each
power-on.
15 ROSC
l
Insert a 30 k
resistor (Precision within 1%) between this pin and the
DGND pin. The same resistor should also be inserted if an external clock
is used. The resistor value determines the frequency of the clock for
control in this device.
8 EXTCLK
l
External clock input pin. Allowable clock frequency range is 4.0 to 8.192
MHz. When external clock is unused and internal oscillation clock is used,
connect this pin to the DGND.
7
MON
O
Output "H" level during recording/playback operation.
26 SG
O
Analog reference voltage (Signal Ground Voltage) output pin. It is
recommendable to insert a capacitor of 3300 pF or less between this pin
and the AGND pin. Loads except for capacitors should not be connected
to this pin.
31 LIN
l
Inverting input pin for the internal OP amplifier. Non-inverting input pin is
internally connected to SG voltage.
30
LOUT
O
Output pin from the internal OP amplifier.
27
AOUT
O
Analog waveform output. Connect to an amplifier to drive a SP.
10, 11, 13,
18, 20, 22,
28, 29
TEST2
O
Pins for testing the LSl. Must be held "OPEN".
24
TEST1
l
LSl's testing pin. Must be connected to DGND.
1 DV
DD
--
Digital power supply pin. Insert a 0.1
F or larger by-pass capacitor
between this pin and the DGND pin.
16
DGND
--
Digital Ground pin
32 AV
DD
--
Analog power supply pin. Insert a 0.1
F or larger by-pass capacitor
between this pin and the AGND pin.
17
AGND
--
Analog Ground pin
FEDL2500BFULL-02
OKI Semiconductor
ML2500BTA
5/27
ABSOLUTE MAXIMUM RATINGS
Parameter Symbol
Condition
Rating Unit
Power Supply Voltage
V
DD
0.3 to +5.0
V
Input Voltage
V
IN
Ta = 25C
0.3 to V
DD
+0.3 V
Storage Temperature
T
STG
--
55 to +150
C
RECOMMENDED OPERATING CONDITIONS
Parameter Symbol
Condition
Range Unit
Power Supply Voltage
V
DD
DGND = AGND = 0 V
2.7 to 3.3
V
Operating Temperature
T
op
--
40 to +70
C
Min.
Typ.
Max.
External Clock Frequency 1 *1
f
EXTCLK1
-- 3.85
4.096
4.34
MHz
External Clock Frequency 2 *1
f
EXTCLK2
-- 7.70
8.192
8.68
MHz
*1: Applicable only with external clock
ELECTRICAL CHARACTERISTICS
DC Characteristics
DV
DD
= AV
DD
= 2.7 to 3.3 V, DGND = AGND = 0 V, Ta = 40 to +70C
Parameter Symbol
Condition
Min. Typ. Max. Unit
"H" Input Voltage
*1
V
IH
DGND = AGND = 0 V
0.8
V
DD
-- -- V
"L" Input Voltage
*1
V
IL
-- --
--
0.2
V
DD
V
"H" Output Voltage
*2
V
OH
l
OH
= 40
A V
DD
0.3
-- -- V
"L" Output Voltage
*2
V
OL
l
OL
= 2 mA
--
--
0.45
V
"H" Input Current
*1
I
IH
V
IH
= V
DD
--
--
10
A
"L" Input Current
*1
I
IL
V
IL
= 0 V
10
--
--
A
Operating Current Consumption 1
I
DD1
In Recording Operation
--
30
45
mA
Operating Current Consumption 2
I
DD2
In Playback Operation
--
20
30
mA
Operating Current Consumption 3
I
DD3
In Command-Wait State
--
5
10
mA
Powerdown Current Consumption
I
DDS
-- --
--
10
A
*1: Applied to logic input pins (DI, SCK, CS, RESET and EXTCLK) except ROSC and TEST1 pins.
*2: Applied to logic output pins (DO and MON) except TEST2 pin.
PDF 
ZIP