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| 型號： | MCP2200T-I/SO |
| 廠商： | Microchip Technology |
| 文件頁數(shù)： | 34/34頁 |
| 文件大小： | 0K |
| 描述： | IC USB 2.0 - UART 20SOIC |
| 標準包裝： | 1,600 |
| 特點： | USB 至 UART |
| 通道數(shù)： | 8 |
| FIFO's： | 256 字節(jié) |
| 規(guī)程： | USB 2.0 |
| 電源電壓： | 3 V ~ 5.5 V |
| 帶自動流量控制功能： | 是 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 20-SOIC（0.295"，7.50mm 寬） |
| 供應商設備封裝： | 20-SOIC |
| 包裝： | 帶卷 (TR) |
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2010-2011 Microchip Technology Inc.
DS22230D-page 9
MCP2003/4/3A/4A
1.5
Pin Descriptions
TABLE 1-2:
PINOUT DESCRIPTIONS
1.5.1
RECEIVE DATA OUTPUT (RXD)
The Receive Data Output pin is an open drain (OD)
output and follows the state of the LIN pin, except in
Power Down mode.
1.5.2
CS (CHIP SELECT)
This is the Chip Select Input pin. An internal pull-down
resistor will keep the CS pin low. This is done to ensure
that no disruptive data will be present on the bus while
the microcontroller is executing a Power-on Reset and
an I/O initialization sequence. The pin must detect a
high level to activate the transmitter. An internal Low-
Pass filter, with a typical time constant of 10 S,
prevents unwanted wake-up (or transition to Power
Down mode) on glitches.
If CS = 0 when the VBB supply is turned on, the device
goes to Ready mode as soon as internal voltages sta-
bilize, and stays there as long as the CS pin is held low
(0). In Ready mode, the receiver is on, and the LIN
transmitter driver is off.
If CS = 1 when the VBB supply is turned on, the device
will proceed to Operation mode, or TXOFF (refer to
Figure 1-2 – Figure 1-5), as soon as internal voltages
stabilize.
This pin may also be used as a local wake-up input
(refer to Example 1-1). In this implementation, the
microcontroller I/O controlling the CS should be
converted to a high-impedance input allowing the
internal pull-down resistor to keep CS low. An external
switch, or other source, can then wake-up both the
transceiver and the microcontroller (if powered). Refer
to Section 1.3 “Modes of Operation”, for detailed
operation of CS.
1.5.3
WAKE UP INPUT (WAKE)
This pin is only available on the MCP2003/2003A.
The WAKE pin has an internal 800K pull up to VBB. A
falling edge on the WAKE pin causes the device to
wake from Power-Down mode. Upon waking, the
MCP2003/3A will enter Ready mode.
1.5.4
FAULT/TXE
This pin is only available on the MCP2004/2004A. This
pin is bidirectional and allows disabling of the
transmitter, as well as fault reporting related to
disabling the transmitter. This pin is an open-drain
output, with states as defined in TABLE 1-3: “FAULT/
TXE Truth Table”. The transmitter is disabled
whenever this pin is low (‘0’), either from an internal
Pin Name
8-Pin
PDIP,
SOIC
8-Pin
DFN
MCP2003/2003A
MCP2004/2004A
Normal Operation
RXD
1
Receive Data Output (OD), HV
tolerant
Receive Data Output (OD), HV tol-
erant
CS
2
Chip Select (TTL), HV tolerant
Chip Select/Local WAKE (TTL),
HV tolerant
WAKE
(MCP2003/2003A only)
FAULT/TXE
(MCP2004/2004A only)
3
Wake up, HV tolerant
Fault Detect Output (OD)
Transmitter Enable (TTL)
HV tolerant
TXD
4
Transmit Data Input (TTL), HV
tolerant
Transmit Data Input (TTL), HV tol-
erant
VSS
5
Ground
LBUS
6
LIN Bus (bidirectional)
VBB
7
Battery Positive
VREN
8
Voltage Regulator Enable Output Voltage Regulator Enable Output
EP
—
9
Exposed Thermal Pad. Do not
electrically connect or connect to
Vss
Exposed Thermal Pad. Do not
electrically connect or connect to
Vss
Legend: TTL = TTL Input Buffer; OD = Open-Drain Output
Note:
It is not recommended to tie CS high as
this can result in the device entering
Operation
mode
before
the
microcontroller is initialized and may result
in unintentional LIN traffic.
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