TJA1145.pdfTJA1145收发器，支持CAN FD，支持指定报文ID唤醒，高速CAN。NX

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详细说明：TJA1145收发器，支持CAN FD，支持指定报文ID唤醒，高速CAN。NXP Semiconductors TJA1145 High-speed Can transceiver for partial networking 3. Quick reference data Table 1. Quick reference data SymbolParameter Conditions yp Max Unit BAT battery supply voltage 4.5 supply voltage 45 55V VI supply voltage on pin Vio 2.85 5.5V Vin(detpoff power-off detection threshold VBAT falling 2.8 voltage uvd(vcc) undervoltage detection voltage 4.5 4.75V on pin vcc uvd(vIo) undervoltage detection voltage VBAT>4.5V 2.7 285V on pin vio BAT battery supply current Normal mode 1.5mA Sleep made: CAN Offline mode 4059 40°INH 4 CANH HS-CAN TXD CANL PARTIAL NETWORKING CAN FD-passive (1) WAKE-9 WAKE-UP SCK 14 (1) TJA1145T/FD and TJA1145TK/FD only Fig 1. Block diagram TA1145 formation provided in this document is sub ect to legal disclaimers NXP Semiconductors N. 2010 A rights reser Product data sheet Rev.4-09May2018 NXP Semiconductors TJA1145 High-speed Can transceiver for partial networking 6. Pinning information 6.1 Pinning TJA1145T JJA1145TK TJA1145T/FD terminal 1 TJA1145TK/FD index area TXD1 14」ScSN IXD 14 SCSN GND 3 CANH GND 2 13 CANH VCC 112CANL VCC3 12 CANL RXD4 RXD 4 1 SDI 10 BAT VIos 10BAT SDo 6 I WAKE DO WAKE INH7 8 SCK INH 7 8 SCK 0158882 015aa261 Fig 2. Pin configuration diagram: So14 Fig 3. Pin configuration diagram: HVSON14 Transparent top view 6.2 Pin description Table 3. Pin description Symbol Pin Description TXD transmit data inpu GND 21 g ound VCC 5 V CAN transceiver supply voltage RXD receive data output; reads out data from the bus lines supply voltage for 1/0 level adaptor DO SPI data output INH inhibit output for switching external voltage regulators SCK 3456789 SPI clock input WAKE local wake-up input BAT battery supply voltage sPl data input 12 LOW-level can bus line CANH 13 HIGH-evel can bus line SCSN 14 SPl chip select input 1] HVSON14 package die supply ground is connected to both the gnd pin and the exposed center pad. The GND pin must be soldered to board ground For enhanced thermal and electrical performance, it is recommended that the exposed center pad also be soldered to board ground TA1145 formation provided in this document is sub ect to legal disclaimers NXP Semiconductors N. 2010 A rights reser Product data sheet Rev.4-09May2018 5 of NXP Semiconductors TJA1145 High-speed Can transceiver for partial networking 7. Functional description The TJA1145 is a stand-alone high-speed can transceiver containing a variety of fail-safe and diagnostic features that offer enhanced system reliability and advanced power management the transceiver combines the functionality of the tja1043 with ISo 11898-2: 2016 compliant CAN partial networking and autonomous bus biasing 7.1 System controller The system controller manages register configuration and controls the internal functions of the tja1145. detailed device status information is collected and made available to the microcontroller 7.1.1 Operating modes The system controller contains a state machine that supports five operating modes Normal, Standby, Sleep, Overtemp and off. The state transitions are illustrated in Fiqure 7.1.1.1 Normal mode Normal mode is the active operating mode. In this mode, the tjA1145 is fully operational All device hardware is available and can be activated(see Table 4) Normal mode can be selected from Standby or Sleep mode via an SPI command (MC=111) 7.1.1.2 Standby mode Standby mode is the first-level power-saving mode of the TJA1145, featuring low current consumption. The transceiver is unable to transmit or receive data in Standby mode, but the INH pin remains active so voltage regulators controlled by this pin will be active If remote CAN wake-up is enabled (CWe=1; see Table 22), the receiver monitors bus activity for a wake-up request. The bus pins are biased to Gnd (via Ri(em)when the bus is inactive and at approximately 2.5 v when there is activity on the bus(autonomous biasing ). CAN wake-up can occur via a standard wake-up pattern or via a selective wake-up frame(selective wake-up is enabled when CPNc=PNCOK =1; otherwise standard wake-up is enabled) Pin RXD is forced LoW when any enabled wake-up or interrupt event is detected(see Section 7.6) The TJA1145 switches to Standby mode from Off mode if the battery voltage rises above the power-on detection threshold V th(det)pon from Overtemp mode if the chip temperature falls below the overtemperature protection release threshold, T th(relJoto from Sleep mode on the occurrence of a wake-up or interrupt event(see Section 7.6) from Normal or Sleep mode via an SPI command MC =100) from Normal mode if Sleep mode is selected via an SPl command (Mc= 001)while a wake-up event is pending or all wake-up sources are disabled TA1145 formation provided in this document is sub ect to legal disclaimers NXP Semiconductors N. 2010. A rights reserved Product data sheet Rev.4-09May2018 6of57 NXP Semiconductors TJA1145 High-speed Can transceiver for partial networking overtemperature event NORMAL OVERTEMP MC sleep MC= Normal no wake-up pending wake-up enabler MC= Standby MC= Nomal no overtemperature vent nC= Standby OR wake-up event STANDBY SLEEP MC Sleep MC=Sleep no wake-up pending ake-up enabled wake-up pending or wake-up disabled) Vcc or Vio undervoltage event from normal ower-on bAT undervoltage event OFF from any mode Fig 4. TJA1145 system controller state diagram 7.1.1.3 Sleep mode Sleep mode is the second-level power saving mode of the TJA 1145. In Sleep mode, the transceiver behaves as in Standby Mode with the exception that pin INH is set to a high-ohmic state. Voltage regulators controlled by this pin will be switched off, and the current into pin bat will be reduced to a minimum Any enabled wake-up or interrupt event(except SPIF), or an SPl command (provided a valid vio voltage is connected), will wake up the transceiver from Sleep mode Sleep mode can be selected from Normal or Standby mode via an SPl command (MC =001). The TJA1145 will switch to Sleep mode on receipt of this command, provided there are no pending wake-up events and at least one regular wake-up source(Can bus or WAKE pin; see Section 7.6)is enabled. Any attempt to enter Sleep mode while one of these conditions has not been met will cause the t ja1145 to switch to standby mode TA1145 formation provided in this document is sub ect to legal disclaimers NXP Semiconductors N. 2010 A rights reser Product data sheet Rev.4-09May2018 NXP Semiconductors TJA1145 High-speed Can transceiver for partial networking The TJA1145 will also be forced to switch to Sleep mode if a vcc of vio undervoltage event is detected (Vcc/io< VuvD(cc)vuvD(io) for longer than tdet(uvirvcc)/tdet(uv)vio). In this event, all pending wake-up events will be cleared CAN wake-up(CWE =1)and local wake-up via the WAKE pin(WPFE=WPRE =1) are enabled in order to avoid a system deadlock(see Section 7. 11)and selective wake-up is disabled (CPNC=0) Status bit FSMS in the Main status register(Table 6)indicates whether a transition to Sleep mode was selected via an SPI command(FSMs=O)or was forced by an undervoltage event on VCC or VIO(FSMS=1). This bit can be read after the TJA1145 wakes up from Sleep mode to allow the settings of CWE, WPFE, WPRE and CPNc to be re-adjusted if an undervoltage event forced the transition to Sleep mode(sms=1) 7.1.1.4 Off mode The TJA1145 will be in Off mode when the battery voltage is too low to supply the IC. This is the default mode when the battery is first connected The TJAl145 will switch to Off mode from any mode if the battery voltage drops below the power-off threshold (Vth(detpoff) In Off mode, the Can pins and pin INH are in a high-ohmic state When the battery supply voltage rises above the power-on threshold (v th(det)pon),the TJA1145 starts to boot up, triggering an initialization procedure. The TJA 1145 will switch to Standby mode after tstartup 7.1.1.5 Overtemp mode Overtemp mode is provided to prevent TJA1145 being damaged by excessive temperatures. The TJA1145 switches immediately to Overtemp mode from Normal mode when the global chip temperature rises above the overtemperature protection activation threshold, T th(act)otp o help prevent the loss of data due to overheating the TJA1145 issues a warning when the IC temperature rises above the overtemperature warning threshold (t th(wamjotp)When this happens, status bit oTWs is set and an overtemperature interrupt is generated (OTW=1), if enabled(OTWE=1 In Overtemp mode, the can transmitter and receiver are disabled and the can pins are in a high-ohmic state no wake-up event will be detected but a pending wake-up will still be signalled by a low level on pin rxd The TJA1145 exits Overtemp mode and switches to Standby mode if the chip temperature falls below the overtemperature protection release threshold, T th(rel)Jotp if the device is forced to switch to Off mode(vbat v th(detpoff) TA1145 formation provided in this document is sub ect to legal disclaimers NXP Semiconductors N. 2010 A rights reser Product data sheet Rev.4-09May2018 8 of NXP Semiconductors TJA1145 High-speed Can transceiver for partial networking 7.1.1.6 Hardware characterization for the TJA1145 operating modes Table 4. Hardware characterization by functional block Block Operating me Off Standby Normal Sleep Overtemp SPI disabled active active active if vo supplied[1]disabled INH high-ohmic VBAT level VRat level high- ohmic BAT level CAN Offline Active/Offline/Listen-only Offline off (determined by bits CMC see Table 7) RXD Vio le Vio level/LoW許 can bit stream if Vio level/LoW if VIo level/LoW if ake-up event detected CMC=01/10/11; otherwise wake-up event detected wake-up pending same as Standby/Sleep [1] SPI speed is limited in Sleep mode(see Table 35) 7.1.2 System control registers The operating mode is selected via bits mc in the Mode control register. The mode control register is accessed via SPI address 0X01(see Section 7.12 Table 5. Mode control register(address 01h) Bit Symbol Access Value Description 7: 3 reserved R 2:0Mc R mode control 001 Sleep mode Standby mode 111 Normal mode The Main status register can be accessed to monitor the status of the overtemperature warning flag and to determine whether the tJal145 has entered Normal mode after initial power-up. Bit FSMs indicates whether the most recent transition to Sleep mode was triggered by an undervoltage event or by an SPI command Table 6. Main status register(address 03h) Bit Symbol Access Value Description FSMS R Sleep mode transition statu transition to Sleep mode triggered by an SPI command an undervoltage on vcc and/or vio forced a transition to Sleep mode OTWS R overtemperature warning status 0 IC temperature below overtemperature warning threshold IC temperature above overtemperature warning threshold NMS R Normal mode status. TJA1145 has entered Normal mode(after power-up) TJA1145 has powered up but has not yet switched to Normal mode 4: 0 reserved R TA1145 formation provided in this document is sub ect to legal disclaimers NXP Semiconductors N. 2010 A rights reser Product data sheet Rev.4-09May2018 o NXP Semiconductors TJA1145 High-speed Can transceiver for partial networking 7.2 High-speed CAN transceiver The integrated high-speed Can transceiver is designed for active communication at bit rates up to 1 Mbit/s, providing differential transmit and receive capability to a can protocol controller. The transceiver is ISo 11898-2: 2016 compliant (defining high-speed Can with selective wake-up functionality and autonomous bus biasing). The CAN transmitter is supplied via pin vCC while the Can receiver is supplied via pin BAT. The TJA1145 includes additional timing parameters on loop delay symmetry to ensure reliable communication in fast phase at data rates up to 2 Mbit/s, as used in CAN FD networks The Can transceiver supports autonomous Can biasing, which helps to minimize RF emissions. CANH and CANL are always biased to 2. 5V when the transceiver is in Active or Listen-only modes CMC=01/10/11) Autonomous biasing is active in CAN Offline mode-to 2. 5 V if there is activity on the bus (CAN Offline Bias mode) and to gnd if there is no activity on the bus for t> (CAN Offline mode) This is useful when the node is disabled due to a malfunction in the microcontroller or when Can partial networking is enabled. The TJA 1145 ensures that the can bus is correctly biased to avoid disturbing ongoing communication between other nodes. The autonomous Can bias voltage is derived directly from VBAT 7.2.1 CAN operating modes The integrated Can transceiver supports four operating modes: Active, Listen-only, Offline and Offline Bias(see Figure 5). The CAN transceiver operating mode depends on the TJA1145 operating mode and on the setting of bits Cmc in the can control register (Table 7 When the TJAl145 is in Normal mode, the Can transceiver operating mode(offline, Active or Listen-only can be selected via bits CMc in the Can control register(Table 7) When the TJA1145 is in Standby or Sleep modes, the transceiver is forced to offline or Offline Bias mode(depending on bus activity 7.2.1.1 CAN Active mode In Can Active mode the transceiver can transmit and receive data via canh and canl The differential receiver converts the analog data on the bus lines into digital data which is output on pin RXD. The transmitter converts digital data generated by the CaN controller(input on pin TXD) into analog signals suitable for transmission over the CANH and canl bus lines CAN Active mode is selected when CMC =01 or 10. When CMC=01, Vcc undervoltage detection is enabled and the transceiver switches to can offline or can offline bias mode when the voltage on Vcc drops below the 90 threshold When CMC=10, Vcc undervoltage detection is disabled. The transmitter will remain active until the tJA1145 is forced into Sleep mode by the vcc undervoltage event; the transceiver will then switch to CAN Offline or can offline bias mode The can transceiver is in active mode when the TJa1145 is in Normal mode(mc= 111) and the can transceiver has been enabled by setting bits CMC in the Can control register to 01 or 10( see Table 7)and TA1145 formation provided in this document is sub ect to legal disclaimers NXP Semiconductors N. 2010. A rights reserved Product data sheet Rev.4-09May2018 10of57

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