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參數(shù)資料
| 型號： | ML2500 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | 1 Megacell Analog Storage Speech Recording LSI(MCU控制的錄放語音芯片,內(nèi)部濾波器,1兆位flash存儲單元) |
| 中文描述： | 1兆單元模擬存儲語音記錄LSI的控制器（MCU控制的錄放語音芯片，內(nèi)部濾波器，1兆位閃存存儲單元） |
| 文件頁數(shù)： | 1/10頁 |
| 文件大小： | 161K |
| 代理商： | ML2500 |
Semiconductor
ML2500
1 Megacell Analog Storage Speech Recording LSI
Version 1.01, May 1998
Preliminary
GENERAL DESCRIPTION
The ML2500 utilises
analog storage
of speech and sound effects into Flash memory cells. The term
“analog” refers to a method that involves the charging of Flash cells corresponding to the input wave-
form with an analog voltage level at a given sampling point per memory cell. Compared with conven-
tional digitalisation, this corresponds to approximately 8 bit data per speech sample. Analog storage,
therefore, requires only about 1/8th of memory.
The ML2500 incorporates over a million cells equivalent to 1 Megabit memory. A sampling frequency
of 8kHz provided, 128 seconds recording time are available, while 8-bit PCM data would yield only 16
seconds.
Operation control is facilitated by means of a serial peripheral interface (SPI) which accepts command
data and provides status information from and to an external MCU. Command data controls recording,
stop, playback, start and stop addresses, sampling frequencies, etc. Up to 320 recording channels can be
defined each recorded at another sampling frequency if so desired.
An internal oscillation circuit is included in that the device does not need a master clock. Alterna-
tively an external clock can be applied.
Typical applications are for handy phones, answering machines, voice memos, and many more.
FEATURES
Internal
1 megacell
analog storage Flash
10000
(min.) erase/write cycles
10
years (min.) data retention
Write/read accuracy approx.
8-bit
(10mV reference level)
Serial
peripheral interface (mode 0), requires external MCU
Sampling frequencies:
4.0, 5.3, 6.4 and 8.0kHz
Recording
times
:
ca. 128 sec (@8.0kHz)
ca. 160 sec (@6.4kHz)
ca. 193 sec (@5.3kHz)
ca. 256 sec (@4.0kHz)
Recording channels:
320
Internal LPF (
-40dB/oct.
)
Internal generation of
oscillation
External clock frequency range:
4.0 ~ 8.192MHz
Power supply voltage:
+2.7 ~ 3.6V
Typical current:
30mA
(when recording)
Operating temperature:
-20 ~ +85
°
C
Package:
32-TSOP I
(TSOPI32-P-814-0.50-1K)
Order number:
ML2500TA
Page 1
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