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參數(shù)資料
| 型號： | ML2502 |
| 廠商： | OKI SEMICONDUCTOR CO., LTD. |
| 英文描述： | 128 Kilocell Analog Storage Speech Recording LSI(128k位模擬存儲器語音記錄LSI) |
| 中文描述： | 128 Kilocell模擬LSI的存儲語音記錄（128K的位模擬存儲器語音記錄大規(guī)模集成電路） |
| 文件頁數(shù)： | 1/2頁 |
| 文件大?。?/td> | 75K |
| 代理商： | ML2502 |
Semiconductor
ML2502
128 Kilocell Analog Storage Speech Recording LSI
Version 1.00, October 1998
GENERAL DESCRIPTION
The ML2502 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 ML2502 incorporates over 128k cells equivalent to 128KBit memory. A sampling frequency of
6.4kHz provided, 20 seconds recording time are available, while 8-bit PCM data would yield only 2.5
seconds.
The recorder operates stand-alone using switches to set operation modes. One or two channels can
be defined.
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 toys, greeting cards and voice memos.
FEATURES
Internal 128 kilocell 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 and 6.4kHz
Recording times:
ca. 20 sec (@6.4kHz)
ca. 24 sec (@5.3kHz)
ca. 32 sec (@4.0kHz)
Recording channels: 1 or 2
Internal LPF (-40dB/oct.)
Built-in Automatic Gain Control (AGC)
Built-in speaker driver (dynamic and piezo)
Internal generation of oscillation
External clock frequency range: 4.0 ~ 8.192MHz
Power supply voltage: +2.7 ~ 3.3V
Typical current: 30mA (when recording)
Operating temperature: -10 ~ +70
°
C
Package: 30-pin SSOP (SSOP30-P-56-0.65-K)
Low-cost and stand-aloe version of the OKI ML2500TA
Order number: ML2502MB
Preliminary
Page 1
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