MC68000 MOTOROLA [Motorola, Inc], MC68000 Datasheet - Page 278

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

Signal Description
5.12 TYPICAL SERIAL INTERFACE PIN CONFIGURATIONS
Table 5-4 shows typical configurations of the physical layer interface pins for an ISDN envi-
ronment. Table 5-6 shows potential configurations of the physical layer interface pins for a
non-ISDN environment. The IDMA, IACK, and timer pins can be used in all applications ei-
ther as dedicated functions or as PIO pins.
5.13 NMSI1 OR ISDN INTERFACE PINS
The NMSI1 or ISDN interface pins are shown in Figure 5-10.
5-14
NOTES:
NMSI1 or ISDN I/F
NMSI2
NMSI3
1. ISDN environment with SCP port for status/control exchange and with
2. D-ch is used for signaling.
3. B1-ch is used for voice (external CODEC required).
4. B2-ch is used for data transfer.
NOTE: Generic environment with three SCC ports (any protocol) and the SCP port.
NMSI1 or ISDN I/F
NMSI2
NMSI3 (5)
NMSI3 (3)
existing terminal (for rate adaption).
Pins
SCC3 does not use modem control signals.
Pins
Table 5-6. Typical Generic Configurations
Figure 5-10. NMSI1 or ISDN Interface Pins
Table 5-5. Typical ISDN Configurations
MC68302
MC68302 USER’S MANUAL
SCC1 and SCC3
Connected To
Connected To
PA12–PA8
SCC1
SCC2
SCC3
SCC2
SCP
SCP
RXD1 / L1RXD
TXD1 / L1TXD
RCLK1 / L1CLK
TCLK1 / L1SY0 / SDS1
CD1 / L1SY1
CTS1 / L1GR
RTS1 / L1RQ / GCIDCL
BRG1
Terminal with Modem
Terminal with Modem
Terminal without Modem
Status/Control Exchange
SCC1 Used as ISDN D-ch
SCC3 Used as ISDN B2-ch
SCC2 is Connected to Terminal
PIO (Extra Modem Signals and
SCP Select Signals)
Status/Control Exchange
Used As
Used As
MOTOROLA