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SCN68652 датащи(PDF) 11 Page - NXP Semiconductors

номер детали SCN68652
подробное описание детали  Multi-protocol communications controller (MPCC)
PDF  28 Pages
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производитель  PHILIPS [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

SCN68652 датащи(HTML) 11 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
SCN2652/SCN68652
Multi-protocol communications controller (MPCC)
1995 May 01
11
TSOM
TxE =
1?
A
INITIALIZE PCSAR, PCR, TDSRH
(PROCESSOR MUST CLEAR
TABORT/GA IN RESPONSE
TO TxBE = 1)
TxSO = MARK
NO
TSOM = 1
TxE = 1
YES
B
TxA = 1
TRANSMIT FLAG
ON TxSO
TSOM
= 0?
NO
TxBE = 1
PROCESSOR
SHOULD LOAD
TxDB AND
TSOM = 0)
YES
(PROCESSOR MAY
SET TABORT, TGA,
AS REQUIRED)
TABORT
= 1?
YES
NO
TxSO = ABORT = 11111111 IF IDLE = 0
FLAG = 01111110 IF IDLE = 1
UNDER
RUN?
YES
NO
TxSO = ABORT IF IDLE = 0
FLAG IF IDLE = 1
TSOM
= 1?
YES
B
NO
SERIALIZE DATA CHARACTER
IN TxDB, ZERO INSERTION,
ACCUMULATE CRC IF
SPECIFIED BY ECM,
TRANSMIT ON TxSO
ON UNDERRUN:
TxU = 1, TERR = 1
(PROCESSOR
SHOULD
SET TSOM)
TxBE = 1
(PROCESSOR
SHOULD LOAD
TxDB WITH NEXT
DATA CHAR)
TEOM
= 1?
YES
TRANSMIT ACCUMULATED
FCS (IF SPECIFIED) AS
INVERTED REMAINDER
NO
TRANSMIT FLAG ON TxSO*
NO
TEOM
= 0?
TxBE = 1
TSOM
= 1?
YES
B
YES
NO
TxE
= 0?
YES
A
TxA = 0
NO
*GA will be transmitted if TGA is set together with TEOM.
(PROCESSOR SHOULD
RESET TEOM AND SET
TSOM OR DROP TxE)
SD00063
Figure 8. BOP Transmit



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