參數(shù)資料
型號(hào)： STLC1502
廠商： 意法半導(dǎo)體
英文描述： VOICE OVER IP PROCESSOR
中文描述： IP語(yǔ)音處理器
文件頁(yè)數(shù)： 3/81頁(yè)
文件大?。?/td> 526K
代理商： STLC1502
3/81
STLC1502
connected on the same external 32 bits high speed bus
Two MII interfaces can hook directly to two 10/100 Ethernet PHYs
Internal control hardware manages the switching and MAC processing of frames on the two Ethernet
ports
Standard serial communication ports are available for easy device connection
The SPI port is mainly dedicated to the CODEC control. It is compatible with the STM codecs
STLC5046, STLC5048, STW5093. It is a standard SPI port and other peripherals can be connected
to it beside the codec
I2C port can be use to connect a LCD driver in case of IP-phone application, and a serial EEPROM
for boot coded and configuration data storage
GPIO block includes as an alternative function a scanning key encoder for direct interface with a 6x6
keypad matrix
Debouncing function is performed, so no overhead for the ARM controller is introduced
UART port allows connection to a host terminal. Code downloaded through UART can be performed
during boot
A Host Processor Interface (HPI) allows direct connection of an external control processor. The inter-
face is directly compatible with the Motorola MPC850 external bus
3.2 D950 domain
The D950 domain is a DSP machine based on the D950 core.
The D950 core is based on Harvard architecture with separate buses for instruction (I-bus) and data
(X-bus, Y-bus)
The internal ROM runs basic system management code and standard vocoders
G711,G723.1A,G729AB that are included in the H.323 specification
Additional vocoders and algorithms are downloaded from the ARM side through the DPRAM
External CODEC is connected with a standard four wires PCM bus interface
JTAG and emulation port are available for system software/hardware testing
DPRAM is used as a communication channel between the ARM and D950
Control messages and voice packets are exchanged through the DPRAM
Fax over IP support
3.3 Clock Domain
Three main clock domains are present:
D950 and peripherals (100 MHz max)
ARM7 and peripherals (60 MHz max)
PCM (8.192 MHz max)
The clock base is provided by a fixed external 25MHz crystal/oscillator. A 25MHz clock output can be used
as a master clock for external Ethernet PHY devices, in 10BaseT operation.
NOTE: For 100BaseT operation, this clock may not be sufficiently stable with tight jitter requirements.
Thus the PHY’s may need their own 25 MHz crystal.
Internal PLL’s provide independent clocks to the D950 and ARM7 domain.
The ARM frequency is set by external pin, that selects between 50 MHz and 60 MHz.
The D950 frequency can be set by the ARM via Status register programming.
Four possible values are provided:
100 MHz
180 MHz
190 MHz
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
STLC1502D 制造商:STMicroelectronics 功能描述:VOIP STRADIVARIUS 1 - Trays
STLC1502P 制造商:STMicroelectronics 功能描述:VOICE OVER IP PROCESSOR - Trays
STLC1510 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:NorthenLite G.lite DMT Transceiver
STLC1511 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:NorthenLite⑩ G.lite BiCMOS Analog Front-End Circuit
STLC1512 制造商:STMICROELECTRONICS 制造商全稱(chēng):STMicroelectronics 功能描述:NorthenLite⑩ G.lite BiCMOS Analog Front-End Circuit
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