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SCC




 

. 860 (. 5.31) SCC-, . (, , , ) , ISDN.

SCC OSI, SCC , . SCC : NRZ, NRZI, FM0, FM1, Manchester, Differential Manchester. SCC- DPLL (Digital Phase-Locked Loop). SCC-, NRZ.

SCC- SI. SCC- IDL, GCI, PCM, NMSI, (echo) (loopback). , - .

SCC- (TXD, RXD, TCLK, RCLK, , ) , NMSI-. , SCC, DSR DTR .

860 SCC- SICR GSMR. SMC-- SIMODE.

SCC- , (parameter RAM) (dual-port RAM).

MODE GSMR. SCC- :

High-Level/Synchronous Data Link Control (HDLC/SDLC);

Universal Asynchronous Receiver Transmitter (UART);

Binary Synchronous Communication (BISYNC);

(Transparent Mode);

IEEE 802.3 (Ethernet);

Local Talk ( HDLC);

Infrared protocol;

Synchronous UART (1x clock mode);

HDLC (AHDLC).

860 , :

Digital Data Communications Message Protocol (DDCMP);

Signaling System #7 (SS#7);

Profibus;

V.14;

X.21.

860 (. 5.12).

SCC- , , , SCC- , (transparent), - .

(RCLK) (TCLK) SCC- ( BRG- CLK), TCLKx RCLKx DPLL. SCC- . SCC- 1/ . , 50 / 25 .

HDLC, HDLC bus Transparent 2 / (. 5.13). ; SCC- ( ), 8 /.

 

 

5.13

 

 

SCC- 860. GSMR - SCC-, SCC- . 64- , GSMR_H ( GSMR) (. 5.32), 63 32, GSMR_L ( GSMR), 31- 0- (. 5.33).

1 ENR ENT. . , , , , , ENT:= 1 ENR:= 1 - . λ SCC-, / FIFO . SCC- MODE (. 5.14).

 

 

5.14

 

 


 

. ( = TRX = 0) , MODE, SCC-. 860 / , . - . TRX SCC-. = 1, , . TRX = 1, . := TRX:= 1. SCC-, Ethernet, TRX .

, REVD, TCRC RSYN . REVD = 0, - LSB- . REVD = 1, - MSB-.

RSYN , , . 0, = 0, . RSYN = 1, CDS = 1, = 0 . , , HDLC bus, .

TxBD , TCRC (. 5.16) .

 

 

5.16





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