spak302ag33c Freescale Semiconductor, Inc, spak302ag33c Datasheet - Page 5

• Manufacturer Part Number: spak302ag33c
• Description: Mc68302 Integrated Multi-protocol Processor
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor, Inc.
20.048 MHZ
SERIAL
EEPROM
IDL OR GCI BUS
145572 U
MC68SC302
20.048 MHZ CLOCK
I/F
LINE I/F
ISA BUS
Figure 2. Passive NT Terminal Adaptor Block Diagram
Figure 3 shows a basic rate terminal adaptor with the 4-wire S/T interface. This architecture is almost identical
to the U interface TA with the exception that the TA clock source is provided to the S/T transceiver from the
MC68SC302.
SERIAL
EEPROM
IDL OR GCI BUS
145574 S/T
MC68SC302
15.36 MHZ CLOCK
I/F
LINE I/F
15.36 MHZ
ISA BUS
Figure 3. Passive TE Terminal Adaptor Block Diagram with S/T Interface
Figure 4 shows a more full featured terminal adaptor. The two added features are the “Plain Old Telephone”
(POTs) interface and a optional modem datapump. Up to two POTs interfaces can be added on the board to
support simultaneous B channel voice call. The ISA interface provides a separate chip select for an external
data pump which uses an MC145480 to produce an 8khz PCM output that can be directly connected to the
IDL or GCI bus.
MC68SC302 PRODUCT INFORMATION
For More Information On This Product,
Go to: www.freescale.com