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BD41030FJ-E2 Datenblatt(PDF) 4 Page - Rohm |
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BD41030FJ-E2 Datenblatt(HTML) 4 Page - Rohm |
4 / 25 page BD41030FJ-C BD41030HFN-C Description of Block(s) 1. Sleep mode In sleep mode, the transmit/receive function is not available and BD41030FJ-C is under the condition of low power consumption mode. In this mode BD41030FJ-C shifts to sleep mode at startup of power supply (VBAT) when NSLP is “L” or in normal mode also when pin NSLP is “L”. During sleep mode, one of the following wake-up events triggers a shift of state: ・Pin NWAKE “H”→“L” (Shift to standby mode) ・Pin LIN “H”→“L”→“H” (Shift to standby mode) ・Pin NSLP “L”→“H” (Shift to normal mode) The above-mentioned wake-up events shift the mode when a state remains for a given period of time (tNWAKE, tBUS, tgotonorm). Hereinafter, a wake-up event on pin NWAKE is defined as Local wake-up, and a wake-up event on pin LIN is defined as Remote wake-up. 2. Standby mode When a wake-up event occurs on pin NWAKE or pin LIN in sleep mode, BD41030FJ-C shifts to standby mode. In standby mode, pins become the following state: ・Pin INH “H” (≒VBAT voltage) ・Pin RXD “L” (Informs the microcontroller of being in standby mode.) ・Pin LIN Slave resistor ON BD41030FJ-C shifts from standby mode to normal mode when pin NSLP input switches to “H”. 3. Normal mode BD41030FJ-C shifts to normal mode when pin NSLP switches to “H” in sleep mode or standby mode. In normal mode, data can be transmitted or received through the bus line. When receiving data, the transceiver informs a LIN bus input from pin RXD to the microcontroller. When transmitting data, the transceiver converts a TXD input signal to a slew-rate-controlled LIN bus signal and informs the bus line of the converted signal. The maximum operating frequency in this mode is 10 kHz. From this mode, BD41030FJ-C shifts to sleep mode when pin NSLP input switches to “L” and this state remains for a given period of time (tgotosleep). NSLP L RXD L INH H (ON) Termination 30kΩ Transmitter OFF NSLP H NSLP L RXD LIN bus data RXD Hi-z INH H (ON) INH Hi-z Termination 30kΩ Termination Weak pullup Transmitter ON Transmitter OFF Standby mode Sleep mode Normal mode unpower state NSLP=H : after L to H > tgotonorm NWAKE=L : after H to L > tNWAKE or LIN=L to H : after LIN=L > tBUS VBAT<VPOR VBAT<VPOR VBAT>VPOR and NSLP=H : after L to H > tgotonorm VBAT>VPOR and NSLP=L NSLP=L : after H to L > tgotosleep while TXD=H *VPOR=reset Voltage NSLP=H : after L to H > tgotonorm Figure 4. State Transition Chart Table 2. The state of the pin in each mode MODE NSLP TXD RXD INH TRANSMITTER Sleep mode L pull-down Hi-z Hi-z OFF Standby mode L pull-down L H OFF Normal mode H pull-down H:recessive state L:dominant state H ON 〇Product structure : Silicon monolithic integrated circuit 〇This product has no designed protection against radioactive rays . 4/21 TSZ02201-0E2E0H500640-1-2 © 2015 ROHM Co., Ltd. All rights reserved. 2016.08.18 Rev.002 TSZ22111 • 14 • 001 www.rohm.com |
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