參數資料
型號: MCP2050-500E/SL
廠商: Microchip Technology
文件頁數: 42/42頁
文件大?。?/td> 0K
描述: IC TXRX LIN 5.0V LDO/WWDT 14SOIC
產品培訓模塊: Microchip MCP20xx LIN Transceiver Overview
標準包裝: 57
系列: *
2012 Microchip Technology Inc.
DS22299B-page 9
MCP2050
TABLE 1-2:
PINOUT OVERVIEW
PIN Name
PIN Number
PIN Type
Function
14 PIN
20 PIN
VREG
4
3
Output
Voltage Regulator Output
VSS
8
Power
Ground
VBB
10
12
Power
Battery
TXD
5
4
Input, HV-tolerant
Transmit Data Input
RXD
2
1
Output
Receive Data Output
LBUS
9
7
I/O, HV
LIN Bus
CS/LWAKE
3
2
TTL Input, HV-tolerant Chip Select and Local Wake-up Input
FAULT/TXE
11
13
I/O, HV-tolerant
Fault Detect Output/Transmitter Enable Input
RESET
6
5
Output
Reset Output
WWDTRESET
14
17
Output, HV-tolerant
Windowed Watchdog Reset Output
WWDTTRIG
13
15
Input
Windowed Watchdog Trigger Input
WWDTSELECT
12
14
Input
A Resistor between this Pin and Ground
determines the Watchdog Window length
VBATRATIO
1
18
Analog Output
VBATRATIO = VBAT/24 * VREG
NC
7
6,9,10,11,
16,19,20
Not Connected
TABLE 1-3:
FAULT/TXE TRUTH TABLE
TXD
In
RXD
Out
LIN BUS
I/O
Thermal
Override
FAULT/TXE
Definition
External
Input
Driven
Output
CS = 1
LH
VBB
OFF
H
L
FAULT, TXD driven low, LIN BUS shorted to
VBB (Note 1), or LBUS/TXD permanent dom-
inant detected, and Transmit time-out shut-
down.
HH
VBB
OFF
H
OK
LL
GND
OFF
H
OK
HL
GND
OFF
H
OK, data is being received from the LIN BUS
xx
VBB
ON
H
L
FAULT, Transceiver in thermal shutdown
xx
VBB
xL
x
NO FAULT, the CPU is commanding the
transceiver to turn off the transmitter driver
CS = 0 after a wake-up
xx
x
L
Wake-up from LIN bus activity
xx
x
H
Wake-up from POR
Legend: x = don’t care
Note 1:
The FAULT/TXE is valid after approximately 25 s after TXD falling edge. This is to eliminate false fault
reporting during bus propagation delays.
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