MC68306FC16 Datasheet, PDF (116/191 Pages) Motorola, Inc – Integrated EC000 Processor

CHANNEL A
COMMAND REGISTER (CRA)
EXTERNAL
INTERFACE
W
MODE REGISTER 1 (MR1A)
R/W
MODE REGISTER 2 (MR2A)
R/W
TRANSMIT
BUFFER (TBA)
(2 REGISTERS)
RECEIVE
BUFFER (RBA)
(4 REGISTERS)
STATUS REGISTER (SRA)
R
TRANSMIT HOLDING REGISTER
TRANSMIT SHIFT REGISTER
W
TxDA
RECEIVER HOLDING REGISTER 1
R
RECEIVER HOLDING REGISTER 2
RECEIVER HOLDING REGISTER 3
RECEIVER SHIFT REGISTER
FIFO
RxDA
CHANNEL B
COMMAND REGISTER (CRB)
W
MODE REGISTER 1 (MR1B)
R/W
MODE REGISTER 2 (MR2B)
R/W
TRANSMIT
BUFFER (TBB)
(2 REGISTERS)
STATUS REGISTER (SRB)
TRANSMIT HOLDING REGISTER
TRANSMIT SHIFT REGISTER
R
W
TxDB
RECEIVE
BUFFER (RBB)
(4 REGISTERS)
RECEIVER HOLDING REGISTER 1
R
RECEIVER HOLDING REGISTER 2
RECEIVER HOLDING REGISTER 3
RECEIVER SHIFT REGISTER
FIFO
RxDB
NOTE:
R/W = READ/WRITE
R = READ
... W = WRITE
Figure 6-4. Transmitter and Receiver Functional Diagram
6-8
MC68306 USER'S MANUAL
MOTOROLA