MC68000 MOTOROLA [Motorola, Inc], MC68000 Datasheet - Page 382

• Manufacturer Part Number: MC68000
• Manufacturer: MOTOROLA [Motorola, Inc]

MC68302 Applications
Motorola offers a full line of ISDN/IDL compatible chips that enable modular and portable
design of ISDN equipment:
D.6.5 IDL Bus Specification
The IDL bus (see Figure D-12) consists of four wires and provides data exchange with 125-
kbps of full-duplex data consisting of two B-channels (2 x 64 kbps), one D-channel (16
kbps), one M-channel (8 kbps), and one A-channel (8 kbps). The A and M channels are used
to convey maintenance and auxiliary data.
D-32
sec frame period with clock speeds of 1.544 to 2.56 MHz. The IDL supports a total of 160
• MC145472 — ISDN U interface transceiver conforms to the American Standard for
• MC145474 — ISDN S/T interface transceiver conforms to CCITT 1.430 and ANSI
• MC145475 — ISDN S/T interface transceiver conforms to CCITT 1.430 and ANSI
• MC145554/7— Mu-Law and A-Law Companding PCM CODEC Filter (16-pin package).
• MC145564/7— Mu-Law and A-Law Companding PCM CODEC Filter (20-pin package).
ISDN basic access.
T1.605 recommendations.
T1.605 recommendations. Supports NT1 Star Operation.
ISDN DATA TERMINAL
ISDN TELEPHONE
IDL
INT
S/T
S/T
INT
S/T INTERFACE
Figure D-12. IDL Bus Boundaries
MC68302 USER’S MANUAL
IDL BUS BOUNDARIES
INT
S/T
NT - NETWORK
TERMINATOR
IDL
INT
U
U-INTERFACE
LOCAL EXCHANGE
INT
U
IDL
MOTOROLA