SCN68652 datasheet(12/28 Pages) PHILIPS

12 / 28 page

Philips Semiconductors

Product specification

SCN2652/SCN68652

Multi-protocol communications controller (MPCC)

1995 May 01

YES

TSOM,

TxE

= 1?

TxSO = MARK

INITIALIZE PCSAR, PCR, TDSRH

TSOM = 1

TxE = 1

TxA = 1

TRANSMIT SYNC ON TxSO

SYNC FROM PCSARL – IDLE = 0

SYNC FROM TxDB IDLE = 1

TSOM

= 0?

TxBE = 1

AFTER SYNC(S), PROCESSOR

LOADS DATA CHARACTER

IN TxDB AND TSOM = 0

YES

SERIALIZE DATA CHARACTER

IN TxDB, GENERATE VRC

OR ACCUMULATE CRC AS

SPECIFIED, TRANSMIT ON TxSO

TxBE = 1

(PROCESSOR

SHOULD LOAD TxDB)

TEOM

= 1?

(PROCESSOR SHOULD

GET TEOM AT END OF

MESSAGE IF CRC

SPECIFIED)

UNDER-

RUN?

YES

TxSO = SYNC FROM PCSARL IF IDLE = 0

MARK IF IDLE = 1

UNTIL TSOM = 1

TxU = 1, TERR = 1

(PROCESSOR SHOULD

SET TSOM = 1)

YES

TRANSMIT ACCUMULATED

CRC SPECIFIED (IF NO

CRC, TEOM SHOULD = 0)

TxBE = 1

(PROCESSOR

SHOULD CLEAR

TEOM AND DROP

TxE)

TEOM

= 0?

TxSO = SYNC OR TxDB DEPENDING ON

IDLE BIT

YES

TxE

= 0?

YES

TxA = 0

PROCESSOR

SD00064

Figure 9. BCP Transmit

SCN68652 Datasheet(PDF) 12 Page - NXP Semiconductors

SCN68652 Datasheet(HTML) 12 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28

Datasheet Download

Link URL