HD64570 HITACHI [Hitachi Semiconductor], HD64570 Datasheet - Page 41
HD64570
Manufacturer Part Number
HD64570
Description
Serial Communications Adaptor
Manufacturer
HITACHI [Hitachi Semiconductor]
Datasheet
1.HD64570.pdf
(469 pages)
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RXD
RXC
RXC
TRB:
ST2:
FST:
CST1, CST0:
Async:
COP:
BOP:
‡ :
Baud rate
generator
ADPLL
From transmitter
(local loop back)
To transmitter
(local loop back
and auto echo)
TX/RX buffer register
Status register 2
Frame status register
Current status registers 1 and 0
Receive data flow
Asynchronous mode
Byte-synchronous mode
Bit-synchronous mode
Receive data
Figure 1.13 Block Diagram of the MSCI Receiver
Decoder
Receive clock
(1)
Receive shift
register 1 (8)
Zero deletion,
flag, abort, or
idle detection
BOP
Async
BOP
BOP,
COP
Synchronous character,
COP, BOP (CRCCC = 0)
Receive shift
register 2 (8)
secondary station
address detection
Receive CRC calculator
BOP, COP
COP
BOP
(CRCCC =
"1"
Stop bit
(1)
Internal data bus
or framing error
Parity, MP bit,
(16)
Receive shift
register 3 (8)
detection
Parity/MP
(1)
Async
Numbers in parentheses are bit lengths.
Rev. 0, 07/98, page 25 of 453
Receive buffer
(32-byte FIFO)
shift register (8)
Receive delay
Receive CRC
Receive shift
register 4 (8)
register (8)
TRB
8
8
(8)
CST1
Status FIFO
(32 stages)
ST2
CST0
(6)
6
FST
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