MC68000 MOTOROLA [Motorola, Inc], MC68000 Datasheet - Page 144

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

Communications Processor (CP)
4.5.1 SCC Features
Each SCC channel has the following features:
4.5.2 SCC Configuration Register (SCON)
Each SCC controller has a configuration register that controls its operation and selects its
clock source and baud rate. Figure 4-12 shows one of the three SCC baud rate generators.
4-24
• HDLC/SDLC, BISYNC, DDCMP, UART, Transparent, or V.110 Protocols
• Programmable Baud Rate Generator Driven by Main Clock or an External Clock
• Data Clocked by the Baud Rate Generator or Directly by an External Pin
• Supports Modem Signals (RXD, TXD, RCLK, TCLK, RTS, CTS, and CD)
• Full-Duplex Operation
• Echo Mode
• Local Loopback Mode
• Baud Rate Generator Outputs Available Externally
RXD
SCC STATUS
REGISTER
DELIMITER
RECEIVER
CONTROL
UNIT
SCC DATA SYNC
REGISTER
Figure 4-11. SCC Block Diagram
PERIPHERAL
REGISTERS
SHIFTER
DATA
BUS
MC68302 USER’S MANUAL
M68000 BUS
SCC EVENT
SCC MASK
REGISTER
REGISTER
SHIFTER
REGISTERS
DATA
TXD
SCC MODE
REGISTER
TRANSMITTER
CONTROL
UNIT
CONFIGURATION
GENERATOR
GENERATOR
BAUD RATE
REGISTER
INTERNAL
CLOCKS
CLOCK
SCC
MOTOROLA
TCLK
RCLK
CLOCK
MAIN
TIN1