參數(shù)資料
型號： MCP201
廠商： Microchip Technology Inc.
英文描述： LIN Transceiver with Voltage Regulator(帶有集成Vreg的線收發(fā)器)
中文描述： LIN收發(fā)器和穩(wěn)壓器（帶有集成Vreg的線收發(fā)器）
文件頁數(shù)： 6/27頁
文件大小： 417K
代理商： MCP201
DS21730C-page 6
Preliminary
2003 Microchip Technology Inc.
1.5
Pin Descriptions
TABLE 1-3:
MCP201 PINOUT OVERVIEW
1.5.1
POWER OUTPUT (V
REG
)
Positive Supply Voltage Regulator Output pin. The volt-
age output from the regulator also supplies power to
internal logic.
1.5.2
GROUND (V
SS
)
Ground pin.
1.5.3
BATTERY (V
BAT
)
Battery Positive Supply Voltage pin. This pin is also the
input for the internal voltage regulator.
1.5.4
TRANSMIT DATA INPUT (TXD)
Transmit Data Input pin. This pin has an internal pull-up
to V
REG
. The LIN pin is low (dominant) when TXD is
low, and high (recessive) when TXD is high.
1.5.5
RECEIVE DATA OUTPUT (RXD)
Receive Data Output pin. This pin is a standard CMOS
output, and follows the state of the LIN pin.
1.5.6
LIN
Bidirectional LIN bus Interface pin.
1.5.6.1
LIN Transmitter
The LIN Transmitter is the driver unit for the LIN pin and
is controlled by the signal TXD. It has an open collector
output with a current limitation. To reduce EMI, the
edges during the signal changes are slope controlled.
In case the thermal protection detects an over-temper-
ature condition while the signal TXD is LOW, the trans-
mitter is shutdown. The recovery from the thermal
shutdown is equal to adequate cooling time.
1.5.6.2
LIN Receiver
The LIN Receiver monitors the state of the LIN pin and
generates the output signal RXD.
1.5.6.3
CS/WAKE
Chip Select Input pin. When CS = ‘
1
’, the transmitter
and the voltage regulator are both enabled.
If CS/WAKE = ‘
0
’, the device is in Ready mode on
power-up or in Low Power mode. In Low Power mode,
the voltage regulator is shutdown and the transmitter
driver is enabled. The internal pull-down resistor will
keep the CS/WAKE pin low. This is done to ensure that
no disruptive data will be presented on the bus while
the microcontroller is executing a Power-on Reset and
I/O initialization sequence.
The internal pull-down resistor will keep the input low.
An external switch (or other source) can then wake up
both the transceiver and the microcontroller. An exter-
nal-blocking diode and current-imiting resistor are nec-
essary to protect the microcontroller I/O pin (see
Figure 1-2).
Bondpad
Name
Devices
Function
8-Pin
PDIP
8-Pin
SOIC
Normal Operation
RXD
CS/WAKE
V
REG
TXD
1
2
3
4
1
2
3
4
Receive Data Output
Chip Select (TTL-HV)
Power Output
Transmit Data Input
(TTL)
Ground
LIN bus (bidirectional-
HV)
Battery
Fault Detect Output,
Slope Select Input
V
SS
LIN
5
6
5
6
V
BAT
FAULT/SLPS
7
8
7
8
Total
8
8
Legend:
TTL = TTL input buffer,
HV = High Voltage (V
BAT
)
Note:
On POR, the MCP201 enters Ready or
Ready1 mode (see Figure 1-1). In order to
enter Operational mode, the MCP201 has
to see one rising edge on CS.
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