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BD41030FJ-E2 Datenblatt(PDF) 4 Page - Rohm

Teilenummer BD41030FJ-E2
Bauteilbeschribung  LIN Transceiver for Automotive
Download  25 Pages
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Hersteller  ROHM [Rohm]
Direct Link  http://www.rohm.com
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BD41030FJ-E2 Datenblatt(HTML) 4 Page - Rohm

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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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