T7121-EL2中文資料agere數(shù)據(jù)手冊PDF規(guī)格書
T7121-EL2規(guī)格書詳情
Description
The T7121 HDLC Interface for ISDN (HIFI-64) connects serial communications links carrying HDLC bitsynchronous data frames to 8-bit microcomputer systems. There is an optional transparent mode of operation in which no HDLC processing is performed on user data. The device communicates with the system microprocessor as a memory-mapped peripheral and is controlled by reading and writing 19 internal registers. The chip can be instructed to interrupt the microprocessor when it detects certain events requiring microprocessor attention.
Features
■ Low-cost device for B-channel (64 kbits/s) or D-channel (16 kbits/s) data transport.
■ Optional transparent mode—no HDLC framing is performed.
■ Frame sync (FS) allows a slot-select feature to access an individual time slot in any TDM data stream (e.g., Lucent Technologies Microelectronics Group Concentration Highway Interface [CHI] or subset).
■ Bit-masking option allows effective data rates of 8, 16, 24, 32, 40, 48, and 56 kbits/s.
■ Maximum data rate up to 4.096 MHz.
■ Serial data-transfer pins for direct connection to the Lucent ISDN line transceiver T7250C.
■ Supports IOM2, K2, GCI, and SLD interface.
■ Parallel microprocessor interface with either multiplexed or demultiplexed address and data lines for easy interface with any microprocessor.
■ Single interrupt output signal with seven maskable interrupt conditions.
■ Programmable interrupt modes.
■ Memory-mapped read and write registers.
■ TTL/CMOS compatible input/output.
■ 3-state output pins to assist system diagnostics.
■ Low-power 1.25 μm CMOS:
— 30 mW typical operation at 12 MHz.
— 5 mW standby mode (typical).
■ HDLC transceiver:
— Stand-alone HDLC framing operation.
— 64-byte FIFO in both transmit and receive directions.
— Supports block-move instruction.
— Multiple frames allowed in FIFO.
— Programmable FIFO full- and empty-level interrupt.
供應商 | 型號 | 品牌 | 批號 | 封裝 | 庫存 | 備注 | 價格 |
---|---|---|---|---|---|---|---|
AGERESYSTEMS |
23+ |
NA/ |
4250 |
原裝現(xiàn)貨,當天可交貨,原型號開票 |
詢價 | ||
LUCENT |
23+ |
QFP132 |
20000 |
全新原裝假一賠十 |
詢價 | ||
LUCENT |
23+ |
QFP |
4500 |
全新原裝、誠信經(jīng)營、公司現(xiàn)貨銷售! |
詢價 | ||
LUCENT |
2016+ |
DIP |
6523 |
只做原裝正品現(xiàn)貨!或訂貨! |
詢價 | ||
AGERESYST |
22+23+ |
SOJ28 |
54625 |
絕對原裝正品現(xiàn)貨,全新深圳原裝進口現(xiàn)貨 |
詢價 | ||
LUCENT |
23+ |
QFP |
2800 |
絕對全新原裝!現(xiàn)貨!特價!請放心訂購! |
詢價 | ||
Lucent |
18 |
公司優(yōu)勢庫存 熱賣中!! |
詢價 | ||||
AGERESYSTEMS |
22+ |
SOJ28 |
5000 |
原裝現(xiàn)貨庫存.價格優(yōu)勢 |
詢價 | ||
ATT |
新 |
94 |
全新原裝 貨期兩周 |
詢價 | |||
24+ |
3000 |
自己現(xiàn)貨 |
詢價 |