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參數(shù)資料
| 型號(hào)： | AT75C110 |
| 廠商： | Atmel Corp. |
| 英文描述： | Digital Telephone Answering Device(數(shù)字電話應(yīng)答設(shè)備) |
| 中文描述： | 數(shù)字電話答錄機(jī)（數(shù)字電話應(yīng)答設(shè)備） |
| 文件頁(yè)數(shù)： | 1/5頁(yè) |
| 文件大?。?/td> | 29K |
| 代理商： | AT75C110 |
Features
10 MIPS Flash-based AVR
Core Microcontroller
High Efficiency Compression (4.5 kbps)
Automatic Timestamp
Full Duplex Handsfree Support
Line and Acoustic Echo Cancellation
DTMF Generation and Detection
Call Progress Tone Detection
Caller ID and Alert Tone Detection
Power Management and Monitoring
2 On-chip Voice Codecs for Line and User Sides
Programmable Equalizer and AGC
On-chip 100 mW Audio Amplifier
General Purpose UART
DataFlash Controller for Mass Storage and Voice Prompt
LCD Display Controller
Keyboard Controller
User-defined I/Os
Description
The Atmel AT75C110 integrated circuite (IC) provides a cost-effective solution for
embedded or standalone message recording applications. It provides the system
developer with a comprehensive set of programmable DSP algorithms, thus spanning
the range of applications from simple voice recorder to full-fledged smartphone with
display, handsfree features and answering capabilities.
The chip is built around the AVR microcontroller (MCU) architecture. The application
program resides in an on-chip Flash program memory. During the boot stage, this
memory is programmed through the on-chip UART from any software development
platform. The AVR MCU core controls all the on-chip peripherals and supports the
user interface. The main peripheral is the programmable DSP unit.
The DSP unit provides the system with a set of processing facilities widely used in
voice recording and telephone applications. It is controlled by the application software
through predefined system requests. The DSP unit is connected directly to the line
side and acoustic voice codecs and to the DataFlash mass storage memory. This
structure allows the DSP unit to work as a standalone co-processor, while the applica-
tion software performs other system tasks.
The DSP unit features an Atmel proprietary voice compression algorithm which leads
to a bit rate as low as 4.5 kbps. This gives a good compromise between memory
requirements and quality during playback. At that speed, a serial 8M bytes DataFlash
can hold up to 30 minutes of voice messages. This low pincount memory can be glue-
lessly connected to the AT75C110.
Furthermore, the AT75C110 supports advanced telephone features, such as hands-
free operation with echo cancellation, tone handling (DTMF, caller ID, alert, etc.) and
correction for low-cost microphones and speakers.
Rev. 1073AS–A–07/98
Digital
Telephone
Answering
Device
AT75C110
Advance
Information
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