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MCP2003B Arkusz danych(PDF) 5 Page - Microchip Technology

Numer części MCP2003B
Szczegółowy opis  LIN Transceiver
PDF  32 Pages
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Producent  MICROCHIP [Microchip Technology]
Strona internetowa  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

MCP2003B Arkusz danych(HTML) 5 Page - Microchip Technology

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 2015-2016 Microchip Technology Inc.
DS20005463C-page 5
MCP2003B
FIGURE 1-2:
OPERATIONAL MODES STATE DIAGRAM – MCP2003B
TABLE 1-1:
OVERVIEW OF OPERATIONAL MODES
State
Transmitter Receiver VREN
Operation
Comments
POR
OFF
OFF
OFF Check CS: if low, then proceed to Ready mode;
If high, transition to either TOFF or Operation mode,
depending on TXD.
VBB > VBB(MIN) and
Internal Supply stable.
High ohmic pull-up resistor
enabled (900 k
 typical).
Ready
OFF
ON
ON
On CS high level, proceed to Operation or TOFF mode.
Bus Off state.
High ohmic pull-up resistor
enabled (900 k
 typical).
Operation
ON
ON
ON
On CS low level, proceed to Power-Down.
On a fault condition, proceed to TOFF mode.
Normal Operation mode.
RXD has to be at a high
level (>2.5V typical) while
LBUS is recessive.
Power-Down
OFF
Activity
Detect
OFF On CS high level, proceed to Ready mode then
proceed to either Operation or TOFF mode.
Falling edge on WAKE will put the device into
Ready mode.
Rising edge on LIN bus will put the device into
Ready mode.
Low-Power mode.
High ohmic pull-up resistor
enabled (900 k
 typical).
Transmitter
Off
OFF
ON
ON
On CS low level, proceed to Power-Down mode;
On TXD high and no fault condition, proceed to
Operation mode.
High ohmic pull-up resistor
enabled (900k
 typical).
Rising Edge on LBUS or
CS =
1 or
Falling Edge on WAKE pin
TXD =
1 And CS = 1
NO Fault,
And RXD > 2.5V while LBUS recessive
(1)
Fault:
Thermal or Timer
POR
VREN OFF
RX OFF
TX OFF
RPU switch OFF
Ready Mode
VREN ON
RX ON
TX OFF
RPU switch OFF
TOFF Mode
VREN ON
RX ON
TX OFF
RPU switch OFF
Operation Mode
VREN ON
RX ON
TX ON
RPU switch ON
Power-Down
Mode
VREN OFF
RX OFF
TX OFF
RPU switch OFF
VBAT > VBBUV_RISE
Note 1: Achieved via pull-up resistor on RXD (See Example 1-1)



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