. 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).
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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 .
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, 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