scn68652 NXP Semiconductors, scn68652 Datasheet - Page 12
scn68652
Manufacturer Part Number
scn68652
Description
Multi-protocol Communications Controller Mpcc
Manufacturer
NXP Semiconductors
Datasheet
1.SCN68652.pdf
(28 pages)
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Philips Semiconductors
1995 May 01
Multi-protocol communications controller (MPCC)
SHOULD LOAD TxDB)
AFTER SYNC(S), PROCESSOR
(PROCESSOR SHOULD
(PROCESSOR SHOULD
GET TEOM AT END OF
LOADS DATA CHARACTER
PROCESSOR
TEOM AND DROP
MESSAGE IF CRC
TxU = 1, TERR = 1
(PROCESSOR
SHOULD CLEAR
IN TxDB AND TSOM = 0
SET TSOM = 1)
TSOM = 1
(PROCESSOR
TxBE = 1
TxA = 1
TxBE = 1
TxE = 1
SPECIFIED)
TxA = 0
TxBE = 1
TxE)
C
TRANSMIT ACCUMULATED
INITIALIZE PCSAR, PCR, TDSR
SPECIFIED, TRANSMIT ON TxSO
CRC, TEOM SHOULD = 0)
SERIALIZE DATA CHARACTER
CRC SPECIFIED (IF NO
Figure 9. BCP Transmit
OR ACCUMULATE CRC AS
IN TxDB, GENERATE VRC
SYNC FROM PCSAR
TxSO = MARK
SYNC FROM TxDB IDLE = 1
TRANSMIT SYNC ON TxSO
TSOM,
TSOM
TEOM
TEOM
TxE
= 1?
= 0?
= 1?
= 0?
= 0?
TxE
12
A
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
L
H
TxSO = SYNC OR TxDB DEPENDING ON
– IDLE = 0
TxSO = SYNC FROM PCSAR
C
NO
A
MARK IF IDLE = 1
UNTIL TSOM = 1
UNDER-
RUN?
IDLE BIT
B
YES
B
SCN2652/SCN68652
L
IF IDLE = 0
SD00064
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