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MCP2003B Datasheet(PDF) 5 Page - Microchip Technology |
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MCP2003B Datasheet(HTML) 5 Page - Microchip Technology |
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5 / 32 page  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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