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TJA1020T Datasheet(PDF) 4 Page - NXP Semiconductors |
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TJA1020T Datasheet(HTML) 4 Page - NXP Semiconductors |
4 / 22 page 2004 Jan 13 4 Philips Semiconductors Product specification LIN transceiver TJA1020 FUNCTIONAL DESCRIPTION The TJA1020 is the interface between the LIN master/slave protocol controller and the physical bus in a Local Interconnect Network (LIN). The LIN transceiver is optimized for the maximum specified LIN transmission speed of 20 Kbaud providing optimum EMC performance due to wave shaping of the LIN output. Operating modes The TJA1020 provides two modes of normal operation, one intermediate mode and one very low power mode. Figure 3 shows the state diagram. handbook, full pagewidth SLEEP switching on BAT MGU243 (t(NWAKE = 0; after 1−>0) > tNWAKE or t(LIN = 0; after 1−>0) > tBUS) t(NSLP = 1; after 0−>1) > tgotonorm while TXD = 1 t(NSLP = 1; after 0−>1) > tgotonorm while TXD = 0 t(NSLP = 0; after 1−>0) > tgotosleep while TXD = 1 t(NSLP = 0; after 1−>0) > tgotosleep while TXD = 1 t(NSLP = 1; after 0−>1) > tgotonorm while TXD = 0 t(NSLP = 1; after 0−>1) > tgotonorm while TXD = 1 NORMAL SLOPE MODE LOW SLOPE MODE INH = HIGH TERM. = 30 k Ω RXD = LOW trx OFF INH = HIGH TERM. = 30 k Ω RXD = LINDATA trx ON INH = HIGH TERM. = 30 k Ω RXD = LINDATA trx ON INH = FLOATING TERM. = HIGH-OHMIC RXD = FLOATING trx OFF STANDBY trx: transmitter. TERM.: slave termination resistor, connected between pins LIN and BAT. Fig.3 State diagram. |
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