MCP2200T-ISLASHSS datasheet(4/44 Pages) MICROCHIP

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MCP2200

DS20002228C-page 4

 2011-2015 Microchip Technology Inc.

1.1

Supported Operating Systems

Windows XP (SP2 and later), Windows Vista, Windows

7, Windows 8, Windows 8.1 and Windows 10 operating

systems are supported.

1.1.1

ENUMERATION

The MCP2200 will enumerate as a USB device after

Power-on Reset (POR). The device enumerates as

both a Human Interface Device (HID) for I/O control,

and a Virtual Com Port (VCP).

1.1.1.1

Human Interface Device (HID)

The MCP2200 enumerates as an HID, so the device

can be configured and the I/O can be controlled. A DLL

that facilitates I/O control through a custom interface is

supplied by Microchip.

1.1.1.2

Virtual Com Port (VCP)

The VCP enumeration implements the USB-to-UART

data translation.

1.2

Control Module

The control module is the heart of the MCP2200. All

other modules are tied together and controlled via the

control module. The control module manages the data

transfers between the USB and the UART, as well as

the command requests generated by the USB host

controller and the commands for controlling the

function of the UART and I/O.

1.2.1

SERIAL INTERFACE

The control module interfaces to the UART and USB

modules.

1.2.2

INTERFACING TO THE DEVICE

The MCP2200 can be accessed for reading and writing

via USB host commands. The device cannot be

accessed and controlled via the UART interface.

1.3

UART Interface

The MCP2200 UART interface consists of the Tx and

Rx data signals and the RTS/CTS flow control pins.

The UART is configurable for several baud rates. The

available baud rates are listed in Table 1-3.

1.3.1

INITIAL CONFIGURATION

The default UART configuration is 19200, 8, N, 1. The

default start-up baud rate can be changed using the

Microchip-supplied configuration PC tool.

Alternatively, a custom configuration tool can be

created using the Microchip-supplied DLL to set the

baud rate as well as other parameters. See Section 2.0

“Configuration” for details.

1.3.2

GET/SET LINE CODING

The GET_LINE_CODING and SET_LINE_CODING

commands are used to read and set the UART

parameters

while

operation.

For

example,

HyperTerminal sends the SET_LINE_COMMAND when

connecting to the port. The MCP2200 responds by

setting the baud rate only. The other parameters (data

bits, parity, stop bits) remain unchanged.

1.3.2.1

Rounding Errors

The primary baud rate setting (with the rounding errors)

is shown in Table 1-3. If baud rates other than the ones

shown in the table are used, the error percentage can

be calculated using Equation 1-1 to find the actual

baud rate.

TABLE 1-3:

UART PRIMARY BAUD

RATES

TABLE 1-2:

UART CONFIGURATIONS

Parameter

Configuration

Primary Baud Rates

See Table 1-3

Data Bits

Parity

Stop Bits

Desired Rate

Actual rate

% Error

300

0.00%

1200

0.00%

2400

0.00%

4800

0.00%

9600

0.00%

19200

0.00%

38400

38339

0.16%

57600

57692

0.16%

115200

115385

0.16%

230400

230769

0.16%

460800

461538

0.16%

921600

923077

0.16%

MCP2200T-I/SS Datasheet(PDF) 4 Page - Microchip Technology

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