Microchip MCP2200 Usb 2.0 to uart protocol converter with gpio Datasheet

MCP2200
USB 2.0 to UART Protocol Converter with GPIO
Features
Package Types
Universal Serial Bus (USB)
The device will be offered in the following packages:
• Supports full-speed USB (12 Mb/s)
• Implements USB protocol composite device:
- Communication Device Class (CDC) for
communications and configuration
- Human Interface Device (HID) for I/O control
• 128-byte buffer to handle data throughput at any
UART baud rate:
- 64-byte transmit
- 64-byte receive
• Fully configurable VID and PID assignments, and
string descriptors
• Bus powered or self-powered
• USB 2.0 Compliant: TID 40001150
• 20-lead QFN (5 x 5 mm)
• 20-lead SOIC
• 20-lead SSOP
GP7/TxLED 5
GP6/RxLED 6
GP5 7
GP4 8
11 RTS
D+
VSS
VDD
OSC1
OSC2
GP6/RxLED 3
 2011 Microchip Technology Inc.
12 RX
20 19 18 17 16
EEPROM
15 D14 VUSB
EP
21
13 GP0/SSPND
12 GP1/USBCFG
GP5 4
11 GP2
GP4 5
7
8
9 10
CTS
6
RX
• USB activity LED outputs (TxLED and RxLED)
• SSPND output pin
• USBCFG output pin (indicates when the enumeration is completed)
• Operating voltage: 3.0-5.5V
• Oscillator input: 12 MHz
• ESD protection: > 4 kV HBM
• Industrial (I) Operating Temperature: -40°C to
+85°C
14 GP2
13 CTS
RST 1
GP7/TxLED 2
Other
15 GP1/USBCFG
MCP2200
5x5 QFN*
• Eight general purpose I/O pins
• 256 bytes of user EEPROM
16 GP0/SSPND
GP3 9
TX 10
• Responds to SET LINE CODING commands to
dynamically change baud rates
• Supports baud rates: 300-1000k
• Hardware flow control
• UART signal polarity option
General Purpose Input/Output (GPIO) Pins
18 D17 VUSB
RST 4
RTS
Universal Asynchronous Receiver/Transmitter
(UART)
19 D+
TX
• Uses standard Windows® drivers for Virtual Com
Port (VCP): Windows XP (SP2 or later), Vista, 7
• Configuration utility for initial configuration
20 VSS
VDD 1
OSC1 2
OSC2 3
GP3
USB Driver and Software Support
MCP2200
SOIC, SSOP
* Includes Exposed Thermal Pad (EP); see Table 1-1.
DS22228B-page 1
MCP2200
Block Diagram
GP5 GP3 GP1
TXLED/ RXLED/
GP4 GP2 GP0 GP7
GP6
Configuration
and Control
Registers
256 Byte
EEPROM
GPIO
USB LEDs
TX
RX
CTS
D+
UART
Controller
USB Protocol
Controller
Control
USB
Transceiver
RTS
DVUSB
Baud
Generator
State USB
Clock Clock
DS22228B-page 2
VSS
Osc
Reset
3.3V
LDO
VSS
OSC1 OSC2
RST
VDD
 2011 Microchip Technology Inc.
MCP2200
1.0
FUNCTIONAL DESCRIPTION
The MCP2200 is a USB-to-UART serial converter
which enables USB connectivity in applications that
have a UART interface. The device reduces external
components by integrating the USB termination
resistors. The MCP2200 also has 256 bytes of
integrated user EEPROM.
TABLE 1-1:
Pin
Name
The MCP2200 has eight general purpose input/output
pins. Four pins have alternate functions to indicate
USB and communication status. See Table 1-1 and
Section 1.6 “GPIO Module” for details about the pin
functions.
PINOUT DESCRIPTION
SSOP,
Pin
QFN
SOIC
Type
Standard Function
Alternate Function
GP0/SSPND
16
13
I/O
General purpose I/O
USB suspend status pin
(refer to Section 1.6.1.1)
GP1/USBCFG
15
12
I/O
General purpose I/O
USB configuration status pin
(refer to Section 1.6.1.2)
GP2
14
11
I/O
General purpose I/O
GP3
9
6
I/O
General purpose I/O
GP4
8
5
I/O
General purpose I/O
GP5
7
4
I/O
General purpose I/O
GP6/RxLED
6
3
I/O
General purpose I/O
USB receive activity LED output
(refer to Section 1.6.1.3)
GP7/TxLED
5
2
I/O
General purpose I/O
USB transmit activity LED
output (refer to Section 1.6.1.4)
RST
4
1
I
Reset input must be externally biased
CTS
13
10
I
Hardware flow control “Clear to Send” input
signal
RX
12
9
I
USART RX input
RTS
11
8
O
Hardware flow control “Request to Send”
output signal
TX
10
7
O
USART TX output
VDD
1
18
P
Power
VSS
20
17
P
Ground
OSC1
2
19
I
Oscillator input
OSC2
3
20
O
Oscillator output
D+
19
16
I/O
USB D+
USB D-
D-
18
15
I/O
VUSB
17
14
P
USB power pin (internally connected to
3.3V). Should be locally bypassed with a
high quality ceramic capacitor.
EP
—
21
—
Exposed Thermal Pad (EP). Do not
electrically connect.
 2011 Microchip Technology Inc.
DS22228B-page 3
MCP2200
1.1
Supported Operating Systems
1.3.1
INITIAL CONFIGURATION
Windows XP (SP2 and later), Vista, and Windows 7
operating systems are supported.
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.
1.1.1
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.
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 VCP.
1.1.1.1
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
VCP
The VCP enumeration implements the USB-to-UART
data translation.
1.2
TABLE 1-2:
HID
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
command requests generated by the USB host
controller, and commands for controlling the function of
the UART and I/O.
UART CONFIGURATIONS
Parameter
Configuration
Primary Baud Rates
See Table 1-3
Data Bits
8
Parity
N
Stop Bits
1
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 in 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 control module interfaces to the UART and USB
modules.
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.
1.2.2
TABLE 1-3:
1.2.1
SERIAL INTERFACE
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
Desired Rate
UART PRIMARY BAUD
RATES
Actual rate
% Error
300
300
0.00%
1200
1200
0.00%
2400
2400
0.00%
The MCP2200 UART interface consists of the TX and
RX data signals and the RTS/CTS flow control pins.
4800
4800
0.00%
9600
9600
0.00%
The UART is configurable for several baud rates. The
available baud rates are listed in Table 1-3.
19200
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%
DS22228B-page 4
 2011 Microchip Technology Inc.
MCP2200
EQUATION 1-1:
SOLVING FOR ACTUAL
BAUD RATE
12MHz
ActualRate = ------------------int  x 
Where:
1.3.3
12MHz
x = ----------------------------------DesiredBaud
CUSTOM BAUD RATES
Custom baud rates are configured by sending the
SET_LINE_CODING USB command, or by using the
DLL. See Section 2.0 “Configuration” for more
information.
1.3.4
HARDWARE FLOW CONTROL
1.4
USB Protocol Controller
The USB controller in the MCP2200 is full-speed USB
2.0 compliant.
• Composite device (CDC + HID):
- CDC: USB-to-UART communications
- HID: I/O control, EEPROM access and initial
configuration
• 128 byte buffer to handle data throughput at any
UART baud rate:
- 64-byte transmit
- 64-byte receive
• Fully configurable VID and PID assignments, and
descriptors (stored on-chip)
• Bus powered or self-powered
Hardware flow control uses the RTS and CTS pins as
a handshake between two devices. The RTS pin of
one device is typically connected to the CTS of the
other device.
1.4.1
RTS is an active low output that notifies the other
device when it is ready to receive data by driving the pin
low. The MCP2200 trip point for de-asserting RTS
(high) is 63 characters. This is one character short of
“buffer full”.
1.4.2
CTS is an active low input that notifies the MCP2200
when it is ready to send data. The MCP2200 will check
CTS just before loading and sending UART data. If the
pin is asserted during a transfer, the transfer will continue. Refer to Figure 1.4.
The MCP2200 exits Suspend mode when any of the
following events occur:
FIGURE 1-1:
RTS/CTS CONNECTIONS
EXAMPLE
I am ready
to receive
I am ready
to receive
RTS
I’ll transmit
if okay
RTS
I’ll transmit
if okay
CTS
MCU
CTS
MCP2200
During configuration, the supplied PC interface stores
the descriptors in the MCP2200.
Flow Control Disabled
The buffer pointer does not increment (or reset to
zero) if the buffer is full. Therefore, if hardware flow
control is not enabled and an overflow occurs (i.e., 65
unprocessed characters received), the new data
overwrites the last position in the buffer.
 2011 Microchip Technology Inc.
SUSPEND AND RESUME
The USB Suspend and Resume signals are supported
for power management of the MCP2200. The device
enters Suspend mode when “suspend signaling” is
detected on the bus.
1.
2.
3.
“Resume signaling” is detected or generated
A USB “Reset” signal is detected
A device Reset occurs
1.5
USB Transceiver
The MCP2200 has a built-in, USB 2.0, full-speed
transceiver internally connected to the USB module.
The USB transceiver obtains power from the VUSB pin,
which is internally connected to the 3.3V regulator. The
best electrical signal quality is obtained when VUSB is
locally bypassed with a high quality ceramic capacitor.
1.5.1
INTERNAL PULL-UP RESISTORS
The MCP2200 devices have built-in pull-up resistors
designed to meet the requirements for full-speed USB.
1.5.2
1.3.4.1
DESCRIPTORS
MCP2200 POWER OPTIONS
The following are the main power options for the
MCP2200:
• USB Bus Powered (5V)
• 3.3V Self Powered
DS22228B-page 5
MCP2200
1.5.2.1
Internal Power Supply Details
MCP2200 offers various options for power supply. To
meet the required USB signaling levels, MCP2200
device incorporates an internal LDO used solely by the
USB transceiver, in order to present the correct D+/Dvoltage levels.
Figure 1-2 shows the internal connections of the USB
transceiver LDO in relation with the VDD power supply
rail. The output of the USB transceiver LDO is tied to
the VUSB line. A capacitor connected to the VUSB pin is
required if the USB transceiver LDO provides the 3.3V
supply to the transceiver.
FIGURE 1-2:
MCP2200 INTERNAL
POWER SUPPLY DETAILS
1.5.2.2
USB Bus Powered (5V)
In Bus Power Only mode, all power for the application
is drawn from the USB (Figure 1-3). This is effectively
the simplest power method for the device.
FIGURE 1-3:
VBUS
BUS POWER ONLY
VDD
VUSB
VSS
VDD
IN
LDO
3.3V
VUSB
D+
D-
OUT
USB
Transceiver
In order to meet the inrush current requirements of the
USB 2.0 specifications, the total effective capacitance
appearing across VBUS and ground must be no more
than 10 µF. If it is not more than 10 µF, some kind of
inrush limiting is required. For more details on Inrush
Current Limiting, search for that subject in the current
Universal Serial Bus Specification.
According to the USB 2.0 specification, all USB devices
must also support a Low-Power Suspend mode. In the
USB Suspend mode, devices must consume no more
than 500 µA (or 2.5 mA for high powered devices that
are remote wake-up capable) from the 5V VBUS line of
the USB cable.
The host signals the USB device to enter Suspend
mode by stopping all USB traffic to that device for more
than 3 ms.
The provided VDD voltage has a direct influence on the
voltage levels present on the GPIO pins (Rx/Tx and
RTS/CTS). When VDD is 5V, all of these pins will have
a logical ‘1’ around 5V with the variations specified in
Section 3.1, DC Characteristics.
For applications that require a 3.3V logical ‘1’ level,
VDD must be connected to a power supply providing
the 3.3V voltage. In this case, the internal USB transceiver LDO cannot provide the required 3.3V power. It
is necessary to also connect the VUSB pin of the
MCP2200 to the 3.3V power supply rail. This way, the
USB transceiver is powered up directly from the 3.3V
power supply.
DS22228B-page 6
The USB bus provides a 5V voltage. However, the USB
transceiver requires 3.3V for the signaling (on D+ and
D- lines).
During USB Suspend mode, the D+ or D- pull-up
resistor must remain active, which will consume some
of
the
allowed
suspend
current
budget
(500 µA/2.5 mA). The VUSB pin is required to have an
external bypass capacitor. It is recommended that the
capacitor be a ceramic cap, between 0.22 and 0.47 µF.
Figure 1-4 shows a circuit where MCP2200’s internal
LDO is used to provide 3.3V to the USB transceiver.
The voltage on the VDD affects the voltage levels onto
the GPIO pins (Rx/Tx and RTS/CTS). With VDD at 5V,
these pins will have a logic ‘1’ of 5V with the variations
specified in Section 3.1, DC Characteristics.
 2011 Microchip Technology Inc.
MCP2200
FIGURE 1-4:
5V (USB Bus)
or external
power supply
TYPICAL POWER SUPPLY
OPTION USING THE 5V
PROVIDED BY THE USB
FIGURE 1-5:
USING AN EXTERNALLY
PROVIDED 3.3V POWER
SUPPLY
5V (USB Bus)
or external
External
3.3V
power supply
VDD
LDO
VDD
IN
IN
LDO
3.3V
LDO
3.3V
VUSB
D+
D-
1.5.2.3
D+
USB
Transceiver
3.3V Self Powered
Typically, many embedded applications are using 3.3V
power supplies. When such an option is available in the
target system, MCP2200 can be powered up from the
existing 3.3V power supply rail. The typical connections
for MCP2200 are shown in Figure 1-5.
In this example MCP2200 has both VDD and VUSB lines
tied to the 3.3V rail. These tied connections disable the
internal USB transceiver LDO of the MCP2200 to regulate the power supply on VUSB pin. Another consequence is that the ‘1’ logical level on the GPIO pins will
be at the 3.3V level, in accordance with the variations
specified in Section 3.1, DC Characteristics.
OUT
VUSB
OUT
USB
Transceiver
D-
1.6
GPIO Module
The GPIO Module is a standard 8-bit I/O port.
1.6.1
CONFIGURABLE PIN FUNCTIONS
The pins can be configured as:
• GPIO – individually configurable general purpose
input or output
• SSPND – USB Suspend state
• USBCFG – indicates USB configuration status
• RxLED – indicates USB receive traffic
• TxLED – indicates USB transmit traffic
1.6.1.1
SSPND Pin Function
The SSPND pin (if enabled) reflects the USB state
(Suspend/Resume). The pin is active ‘low’ when the
Suspend state has been issued by the USB host.
Likewise, the pin drives ‘high’ after the Resume state is
achieved.
This pin allows the application to go into Low Power
mode when USB communication is suspended, and
switches to a full active state when USB activity is
resumed.
1.6.1.2
USBCFG Pin Function
The USBCFG pin (if enabled) starts out ‘low’ during
power-up or after Reset, and goes ‘high’ after the
device successfully configures to the USB. The pin will
go ‘low’ when in Suspend mode and ‘high’ when the
USB resumes.
 2011 Microchip Technology Inc.
DS22228B-page 7
MCP2200
1.6.1.3
RxLED Pin Function (IN Message)
The ‘Rx’ in the pin name is in respect to the USB host.
The RxLED pin is an indicator for USB ‘IN’ messages.
This pin will either pulse low for a period of time
(configurable for ~100 ms or ~200 ms), or toggle to the
opposite state for every message received
(IN message) by the USB host. This allows the
application to count messages or provide a visual
indication of USB traffic.
1.6.1.4
TxLED Pin Function (OUT Message)
The ‘Tx’ in the pin name is in respect to the USB host.
The TxLED pin is an indicator for USB ‘OUT’
messages.
When the device starts normal operation (i.e., exits the
Reset condition), device operating parameters
(voltage, frequency, temperature, etc.) must be met to
ensure operation. If these conditions are not achieved,
the device must be held in Reset until the operating
conditions are met.
1.9
Oscillator
The input clock must be 12 MHz to provide the proper
frequency for the USB module.
USB full-speed is nominally 12 Mb/s. The clock input
accuracy is ±0.25% (2,500 ppm maximum).
FIGURE 1-6:
This pin will either pulse low for a period of time
(configurable for ~100 ms or ~200 ms), or toggle to the
opposite state for every message transmitted (OUT
message) by the USB host. This allows the application
to count messages or provide a visual indication of
USB traffic.
1.7
QUARTZ CRYSTAL
OPERATION
MCP2200
OSC1
EEPROM Module
The EEPROM module is a 256 byte array of nonvolatile
memory. The memory locations are accessed for
read/write operations via USB host commands. Refer
to Section 2.0 “Configuration” for details on accessing the EEPROM. The memory cells for data EEPROM
are rated to endure thousands of erase/write cycles,
up to 100K for EEPROM.
RF(2)
R (1)
Quartz Crystal S
12 MHz
OSC2
Data retention without refresh is conservatively
estimated to be greater than 40 years.
Note 1: A series resistor (RS) may be required
for quartz crystals with high drive level.
The host should wait for the write cycle to complete and
then verify the write by reading the byte(s).
2: The value of RF is typically between
2 M to 10 M..
1.8
1.8.1
RESET/POR
RESET PIN
The RST pin provides a method for triggering an
external Reset of the device. A Reset is generated by
holding the pin low. These devices have a noise filter in
the Reset path which detects and ignores small pulses.
1.8.2
FIGURE 1-7:
CERAMIC RESONATOR
OPERATION
Example: muRata
CSTCE12M0G15L
POR
MCP2200
OSC1
A POR pulse is generated on-chip whenever VDD rises
above a certain threshold. This allows the device to
start in the initialized state when VDD is adequate for
operation.
To take advantage of the POR circuitry, tie the RST pin
through a resistor (1 kOhm to 10 kOhm) to VDD. This
will eliminate external RC components usually needed
to create a POR delay.
DS22228B-page 8
OSC2
Resonator
12 MHz
 2011 Microchip Technology Inc.
MCP2200
2.0
CONFIGURATION
The MCP2200 is configured by writing special
commands using the HID interface. Configuration can
be achieved using the configuration utility provided by
Microchip. Alternatively, a custom utility can be
developed by using the DLL available on the MCP2200
product page.
2.1
Configuration Utility
The configuration utility provided by Microchip allows
the user to configure the MCP2200 to custom defaults.
The configuration utility (shown in Figure 2-1) connects
to the device’s HID interface, where all of the
configurable features can be set.
2.2
Serial String
The MCP2200 is supplied from the factory with a
serialized USB serial string.
TABLE 2-1:
CONFIGURATION DESCRIPTIONS
Configuration Name
Description
Vendor ID (0x04D8)
The USB vendor identification assigned to Microchip by the USB consortium.
Product ID (0x00DF)
Device ID assigned by Microchip. The device can be used “as-is”, or Microchip
can assign a custom PID by request.
Baud Rate
Sets the UART baud rate using a list of primary baud rates. See the UART
section for details on setting non-primary baud rates.
IO Config
Individually configures the I/O to inputs or outputs.
IO Default
Individually configures the output default state for pins configured as outputs.
Tx/Rx LEDs
Enables/disables the GP6 and GP7 pins to function as USB traffic indicators.
Pins are active low when configured as traffic indicators.
Hardware Flow Control
Enables/disables CTS and RTS flow control.
USBCFG Pin
Enables/disables the GP1 pin as a USB configuration status indicator.
Suspend Pin
Enables/disables the GP0 pin as a USB suspend status pin.
Invert Sense
Enables/disables the UART lines states:
- Normal – Tx/Rx idle high; CTS/RTS active low
- Inverted – Tx/Rx idle low; CTS/RTS active high
Manufacturer String
USB manufacturer string.
Product String
USB product string.
 2011 Microchip Technology Inc.
DS22228B-page 9
MCP2200
FIGURE 2-1:
DS22228B-page 10
CONFIGURATION UTILITY
 2011 Microchip Technology Inc.
MCP2200
2.3
Simple Configuration and I/O DLL
To help the user develop a custom configurator,
Microchip provides a DLL that uses Microsoft®.NET
Framework 3.5. There is documentation about drivers
and utilities on the MCP2200 product page at
www.microchip.com (in the Software section) with
information on associating the DLL with a Visual C++
project.
TABLE 2-2:
2.3.1
SIMPLE I/O DLL CALLS
Table 2-2 lists the functions provided by the DLL to
allow the configuration of the device and control of the
I/O.
CONFIGURATION FUNCTIONS
Category and Function Name
Initialization (Note 1)
void InitMCP2200(VID, PID)
Configuration (Note 2)
bool ConfigureIO(mask)
bool ConfigureIoDefaultOutput(mask, defaultGpioOutputValue)
bool fnRxLED (OFF/TOGGLE/BLINKSLOW/BLINKFAST)
bool fnTxLED (OFF/TOGGLE/BLINKSLOW/BLINKFAST)
bool fnHardwareFlowControl (ON/OFF)
bool fnULoad(ON/OFF)
bool fnSuspend (ON/OFF)
bool ConfigureMCP2200(mask, baudrate, RxLedMode, TxLedMode, flowCtrl, ULoad, suspend)
bool ConfigureIO(mask)
Miscellaneous
String^ GetDeviceInfo(deviceIndex)
unsigned int GetNoOfDevices()
int GetSelectedDevice()
String^ GetSelectedDeviceInfo()
bool IsConnected()
int SelectDevice(uiDeviceNo)
int ReadEEPROM(uiEEPAddress)
int WriteEEPROM(uiEEPAddress, ucValue)
I/O Control
bool ClearPin(pinnumber)
bool SetPin(pinnumber)
bool ReadPin(pinnumber, *pinvalue)
int ReadPinValue(pinnumber)
bool ReadPort(*portValue)
int ReadPortValue()
bool WritePort(portValue)
Summary
bool SimpleIOClass::ClearPin(unsigned int pin)
Section 2.3.1.1
bool SimpleIOClass::ConfigureIO (unsigned char IOMap)
Section 2.3.1.2
bool SimpleIOClass::ConfigureIoDefaultOutput(unsigned char ucIoMap, unsigned char ucDefValue
)
Section 2.3.1.3
bool SimpleIOClass::ConfigureMCP2200 (unsigned char IOMap, unsigned long BaudRateParam, unsigned
int RxLEDMode, unsigned int TxLEDMode, bool FLOW, bool ULOAD,bool SSPND)
Section 2.3.1.4
bool SimpleIOClass::fnHardwareFlowControl (unsigned int onOff)
Note 1:
2:
Section 2.3.1.5
Prior to any DLL API usage, a call to the InitMCP2200() function is needed. This function is the only
initialization function in the presented DLL.
The configuration only needs to be set a single time – it is stored in NVM.
 2011 Microchip Technology Inc.
DS22228B-page 11
MCP2200
TABLE 2-2:
CONFIGURATION FUNCTIONS (CONTINUED)
Category and Function Name
Summary (Continued)
bool SimpleIOClass::fnRxLED (unsigned int mode)
Section 2.3.1.6
bool SimpleIOClass::fnSetBaudRate (unsigned long BaudRateParam)
Section 2.3.1.7
bool SimpleIOClass::fnSuspend(unsigned int onOff)
Section 2.3.1.8
bool SimpleIOClass::fnTxLED (unsigned int mode)
Section 2.3.1.9
bool SimpleIOClass::fnULoad(unsigned int onOff)
Section 2.3.1.10
String^ SimpleIOClass::GetDeviceInfo(unsigned int uiDeviceNo)
Section 2.3.1.11
unsigned int SimpleIOClass::GetNoOfDevices(void)
Section 2.3.1.12
int SimpleIOClass::GetSelectedDevice(void)
Section 2.3.1.13
String^ SimpleIOClass::GetSelectedDeviceInfo(void)
Section 2.3.1.14
void SimpleIOClass::InitMCP2200 (unsigned int VendorID, unsigned int ProductID)
Section 2.3.1.15
bool SimpleIOClass::IsConnected()
Section 2.3.1.16
int SimpleIOClass::ReadEEPROM(unsigned int uiEEPAddress)
Section 2.3.1.17
bool SimpleIOClass::ReadPin(unsigned int pin, unsigned int *returnvalue)
Section 2.3.1.18
int SimpleIOClass::ReadPinValue(unsigned int pin)
Section 2.3.1.19
bool SimpleIOClass::ReadPort(unsigned int *returnvalue)
Section 2.3.1.20
int SimpleIOClass::ReadPortValue()
Section 2.3.1.21
int SimpleIOClass::SelectDevice(unsigned int uiDeviceNo)
Section 2.3.1.22
bool SimpleIOClass::SetPin(unsigned int pin)
Section 2.3.1.23
int SimpleIOClass::WriteEEPROM(unsigned int uiEEPAddress, unsigned char ucValue)
Section 2.3.1.24
bool SimpleIOClass::WritePort(unsigned int portValue)
Section 2.3.1.25
Constants
const unsigned int OFF = 0;
const unsigned int ON = 1;
const unsigned int TOGGLE = 3;
const unsigned int BLINKSLOW = 4;
const unsigned int BLINKFAST = 5;
Note 1:
2:
Prior to any DLL API usage, a call to the InitMCP2200() function is needed. This function is the only
initialization function in the presented DLL.
The configuration only needs to be set a single time – it is stored in NVM.
2.3.1.1
ClearPin
Function:
bool SimpleIOClass::ClearPin (unsigned int pin)
Summary:
Clears the specified pin.
Description:
Clears the specified pin to logic ‘0’.
Precondition:
This pin must be previously configured as an output via a ConfigureIO or
ConfigureIoDefaultOutput call.
Parameters:
pin - The pin number to set (0-7).
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
None
EXAMPLE 2-1:
if (SimpleIOClass::ClearPin (2))
{
lblStatusBar->Text = “Success”;
}
else
lblStatusBar->Text = “Invalid command ” +
DS22228B-page 12
SimpleIOClass::LastError;
 2011 Microchip Technology Inc.
MCP2200
2.3.1.2
ConfigureIO
Function:
bool SimpleIOClass::ConfigureIO (unsigned char IOMap)
Summary:
Configures the GPIO pins for Digital Input, Digital Output.
Description:
GPIO Pins can be configured as Digital Input, Digital Output.
Precondition:
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
IOMap - a byte that represents a bitmap of the GPIO configuration:
• a bit set to ‘1’ will be a digital input
• a bit set to ‘0’ will be a digital output
• MSB –
–
–
–
–
–
LSB
GP7 GP6 GP5 GP4 GP3 GP2 GP1 GP0
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
Error code is returned in LastError.
EXAMPLE 2-2:
if (SimpleIOClass::ConfigureIO(0xA5) == SUCCESS)
lblStatusBar->Text = “Success”;
else
lblStatusBar->Text = “Invalid command ” + SimpleIOClass::LastError;
2.3.1.3
ConfigureIoDefaultOutput
Function:
bool SimpleIOClass::ConfigureIoDefaultOutput (unsigned char ucIoMap, unsigned char ucDefValue)
Summary:
Configures the IO pins for Digital Input, Digital Output and also the default output latch value.
Description:
IO Pins can be configured as Digital Input, Digital Output. The default output latch value is received
as a parameter.
Precondition:
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
1.
2.
ucIoMap - a byte that represents a bitmap used to set the GPIOs as either input or output.
• ‘1’ configures GPIO as input
• ‘0’ configures GPIO as output
• MSB –
–
–
–
–
–
LSB
GP7 GP6 GP5 GP4 GP3 GP2 GP1 GP0
ucDefValue - the default value that will be loaded to the output latch (affects only the pins configured as
outputs).
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
Error code is returned in LastError.
EXAMPLE 2-3:
if (SimpleIOClass::ConfigureIoDefaultOutput(IoMap, DefValue) == SUCCESS)
lblStatusBar->Text = “Success”;
else
lblStatusBar->Text = “Invalid command ” + SimpleIOClass::LastError;
 2011 Microchip Technology Inc.
DS22228B-page 13
MCP2200
2.3.1.4
ConfigureMCP2200
Function:
bool SimpleIOClass::ConfigureIoDefaultOutput (unsigned long BaudRateParam, unsigned int RxLEDMode,
unsigned int TxLEDMode, bool FLOW, bool ULOAD, bool SSPND)
Summary:
Configures the device.
Description:
Sets the default GPIO designation, baud rate, TX/RX LED modes, flow control.
Precondition:
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
1.
2.
3.
4.
5.
6.
7.
IOMap - A byte which represents the input/output state of the pins (each bit may be either a ‘1’ for input, and ‘0’
for output.
BaudRateParam - the default communication baud rate.
RxLEDMode - can take one of the constant values (OFF, ON, TOGGLE, BLINKSLOW, BLINKFAST) to define the
behavior of the Rx LED.
• OFF = 0
• ON = 1
• TOGGLE = 3
• BLINKSLOW = 4
• BLINKFAST = 5
TxLEDMode - can take one of the defined values (OFF, ON, TOGGLE, BLINKSLOW, BLINKFAST) in order to define the
behavior of the Tx LED.
FLOW - this parameter establishes the default flow control method (False - no HW flow control, True - RTS/CTS
flow control).
ULOAD - this parameter establishes when USB has loaded the configuration.
SSPND - this parameter establishes when USB send us the Suspend mode.
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
None.
EXAMPLE 2-4:
if (SimpleIOClass::ConfigureMCP2200(0x43, 9600, BLINKSLOW, BLINKFAST, false, false, false)
== SUCCESS)
lblStatusBar->Text = “Success”;
else
lblStatusBar->Text = “Invalid command ”
2.3.1.5
fnHardwareFlowControl
Function:
bool SimpleIOClass::fnHardwareFlowControl (unsigned int onOff)
Summary:
Configures the flow control of the MCP2200. The flow control configuration will be stored in NVRAM.
Description:
Sets the flow control to HW flow control (RTS/CTS) or No flow control.
Precondition:
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
onOff:
• ‘1’ if HW flow control is required
• ‘0’ if no flow control is required
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
Error code is returned in LastError.
EXAMPLE 2-5:
if (SimpleIOClass::fnHardwareFlowControl(1) == SUCCESS)
lblStatusBar->Text = “Success”;
else
lblStatusBar->Text = “Invalid command ” + SimpleIOClass::LastError;
DS22228B-page 14
 2011 Microchip Technology Inc.
MCP2200
2.3.1.6
fnRxLED
Function:
bool SimpleIOClass::fnRxLED (unsigned int mode)
Summary:
Configures the Rx LED mode. Rx LED configuration will be stored in NVRAM.
Description:
Sets the Rx LED mode to one of the possible values.
Precondition:
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
mode (constant): OFF, TOGGLE, BLINKSLOW, BLINKFAST
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
Error code is returned in LastError.
EXAMPLE 2-6:
if (SimpleIOClass::fnRxLED (BLINKFAST) == SUCCESS)
lblStatusBar->Text = “Success”;
else
lblStatusBar->Text = “Invalid command ” + SimpleIOClass::LastError;
2.3.1.7
fnSetBaudRate
Function:
bool SimpleIOClass::fnSetBaudRate (unsigned long BaudRateParam)
Summary:
Configures the device’s default baud rate. The baud rate value will be stored in NVRAM
Description:
Sets the desired baud rate and it will store it into device’s NVRAM.
Precondition:
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
BaudRateParam - the desired baud rate value
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
Error code is returned in LastError. This function is used only to set the default power-up baud rate
value. When used with a terminal program, there is no need to call this function to change the baud
rate. Changing the baud rate from the terminal program, will send the appropriate CDC packet that
will change the communication’s baud rate without the need to call this function.
EXAMPLE 2-7:
if (SimpleIOClass::fnSetBaudRate(9600) == SUCCESS)
lblStatusBar->Text = “Success”;
else
lblStatusBar->Text = “Invalid command ” + SimpleIOClass::LastError;
2.3.1.8
fnSuspend
Function:
bool SimpleIOClass::fnSuspend (unsigned int onOff)
Summary:
Configures the GP0 pin of the MCP2200 to show the status of Suspend/Resume USB states.
Description:
When the GP0 is designated to show the USB Suspend/Resume states, the pin will go low when the
Suspend state is issued, or will go high when the Resume state is on.
Precondition:
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
onOff:
• ‘1’ GP0 will reflect the USB Suspend/Resume states
• ‘0’ GP0 will not reflect the USB Suspend/Resume states (can be used as GPIO)
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
Error code is returned in LastError.
 2011 Microchip Technology Inc.
DS22228B-page 15
MCP2200
EXAMPLE 2-8:
if (SimpleIOClass::fnSuspend(1) == SUCCESS)
lblStatusBar->Text = “Success”;
else
lblStatusBar->Text = “Invalid command ” + SimpleIOClass::LastError;
2.3.1.9
fnTxLED
Function:
bool SimpleIOClass::fnTxLED (unsigned int mode)
Summary:
Configures the Tx LED mode. Tx LED configuration will be stored in NVRAM.
Description:
Sets the Tx LED mode to one of the possible values.
Precondition:
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
mode (constant): OFF, TOGGLE, BLINKSLOW, BLINKFAST
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
Error code is returned in LastError.
EXAMPLE 2-9:
if (SimpleIOClass::fnTxLED (BLINKSLOW) == SUCCESS)
lblStatusBar->Text = “Success”;
else
lblStatusBar->Text = “Invalid command ” + SimpleIOClass::LastError;
2.3.1.10
fnULoad
Function:
bool SimpleIOClass::fnULoad (unsigned int onOff)
Summary:
Configures the GP1 pin of the MCP2200 to show the status of the USB configuration.
Description:
When the GP1 is designated to show the USB configuration status, the pin will start low (during
power-up or after Reset), and it will go high after the MCP2200 is successfully configured by the
host.
Precondition:
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
onOff:
• ‘1’ GP1 will reflect the USB configuration status
• ‘0’ GP1 will not reflect the USB configuration status (can be used as GPIO)
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
Error code is returned in LastError.
EXAMPLE 2-10:
if (SimpleIOClass::fnULoad(1) == SUCCESS)
lblStatusBar->Text = “Success”;
else
lblStatusBar->Text = “Invalid command ” + SimpleIOClass::LastError;
DS22228B-page 16
 2011 Microchip Technology Inc.
MCP2200
2.3.1.11
GetDeviceInfo
Function:
String^ SimpleIOClass::GetDeviceInfo (unsigned int uiDeviceNo)
Summary:
Returns the path name for one of the connected devices.
Description:
The function will return the path name for the given device ID.
Precondition:
At least one call to the InitMCP2200() is required in order to initiate a DLL search for the compatible
devices.
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
uiDeviceNo: The device ID for which the path information is needed. Can have a value between 0
and the number of devices minus 1.
Returns:
This function returns a string containing the path name of the given device id.
• In the case the given ID is out of range, the function will return the “Device Index Error” string.
• In the case the device for which the path name is required is not connected anymore, the return
string will be “Device Not Connected”.
Remarks:
None.
EXAMPLE 2-11:
lblStatusBar->Text = SimpleIOClass::GetDeviceInfo(0);
2.3.1.12
GetNoOfDevices
Function:
unsigned int SimpleIOClass::GetNoOfDevices(void)
Summary:
The function returns the number of available devices present in the system.
Description:
The function returns the number of HID devices (with the given VID/PID) connected to the system.
Precondition:
At least one call to the InitMCP2200() is required in order to initiate a DLL search for the compatible
devices. Also, in order to know the actual number of devices connected to the system, call the
SimpleIOClass::IsConnected() function. VID and PID must be previously set via a call to
InitMCP2200(VID, PID).
Parameters:
None.
Returns:
This function returns the number of HID devices with the given VID/PID (as parameters of
SimpleIOClass::InitMCP2200() function).
Remarks:
Call the SimpleIOClass::IsConnected() prior to the call of this function in order to have the most
recent number of devices that are present in the system.
EXAMPLE 2-12:
SimpleIOClass::IsConnected(); //call this function to refresh the number of
//the devices present in the system
lblStatusBar->Text = SimpleIOClass::GetNoOfDevices();
2.3.1.13
GetSelectedDevice
Function:
int SimpleIOClass::GetSelectedDevice(void)
Summary:
Returns the ID of the selected device
Description:
The function returns the ID of the current selected device.
Precondition:
At least one call to the InitMCP2200() is required in order to initiate a DLL search for the compatible
devices. VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
None.
Returns:
This function returns the ID of the current selected device. Its value can range from 0 to the number of
devices minus 1.
Remarks:
None.
 2011 Microchip Technology Inc.
DS22228B-page 17
MCP2200
EXAMPLE 2-13:
lblStatusBar->Text = SimpleIOClass::GetSelectedDevice();
2.3.1.14
GetSelectedDeviceInfo
Function:
String^ SimpleIOClass::GetSelectedDeviceInfo(void)
Summary:
Returns the selected device path name.
Description:
The function returns a string containing the unique path name of the selected device.
Precondition:
At least one call to the InitMCP2200() is required in order to initiate a DLL search for the compatible
devices. VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
None.
Returns:
This function returns a string containing the unique path name of the selected device.
Remarks:
The default selected device is the first one that the DLL finds. If the user wants to retrieve other
devices path names (assuming more than one device is present in the system), a call to
SimpleIOClass::SelectDevice(deviceNo) is required.
EXAMPLE 2-14:
lblStatusBar->Text = SimpleIOClass::GetSelectedDeviceInfo(void)
2.3.1.15
InitMCP2200
Function:
void SimpleIOClass::InitMCP2200 (unsigned int VendorID, unsigned int ProductID)
Summary:
Configures the Simple IO class for a specific Vendor and product ID.
Description:
Sets the Vendor and Product ID used for the project.
Precondition:
None.
Parameters:
1.
2.
Returns:
None.
Remarks:
Call this function before any other calls, to set the Vendor and Product IDs.
Vendor ID - assigned by USB IF (www.usb.org)
Product ID - assigned by the Vendor ID Holder
EXAMPLE 2-15:
InitMCP2200 (0x4D8, 0x00DF);
2.3.1.16
IsConnected
Function:
bool SimpleIOClass::IsConnected()
Summary:
Checks with the OS if the current VID/PID device is connected.
Description:
Checks if a MCP2200 is connected to the computer. If so, it returns True, otherwise the result will be
False.
Precondition:
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
None.
Returns:
True - if at least one device is connected to the host.
False - if there are no devices connected to the host.
Remarks:
No actual communication with the end device is occurring. The function inquires the OS if the
specified VID/PID was enumerated.
DS22228B-page 18
 2011 Microchip Technology Inc.
MCP2200
EXAMPLE 2-16:
unsigned int rv;
if (SimpleIOClass::IsConnected ())
{
lblStatusBar->Text = “Device connected”;
}
else
lblStatusBar->Text = “Device Disconnected”;
2.3.1.17
ReadEEPROM
Function:
int SimpleIOClass::ReadEEPROM (unsigned int uiEEPAddress)
Summary:
Reads a byte from the EEPROM.
Description:
Reads a byte from the EEPROM at the given address.
Precondition:
At least one call to the InitMCP2200() is required in order to initiate a DLL search for the compatible
devices. VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
uiEEPAddress - the EEPROM address location we need to write to (must be from 0 to 255, inclu-
sively).
Returns:
This function returns any positive value as being the EEPROM’s location value:
• E_WRONG_ADDRESS (-3) - in case the given EEPROM address is out of range
• E_CANNOT_SEND_DATA (-4) - in case the function cannot send the command to the device
Remarks:
None.
EXAMPLE 2-17:
int iRetValue = SimpleIOClass::ReadEEPROM(0x01);
if (iRetValue >= 0)
{
lblStatusBar->Text = “Success”;
}
else
lblStatusBar->Text = “Error reading to EEPROM” +
2.3.1.18
SimpleIOClass::LastError;
ReadPin
Function:
bool SimpleIOClass::ReadPin (unsigned int pin, unsigned int *returnvalue)
Summary:
Reads the specified pin.
Description:
Reads the specified pin and returns the value in returnvalue. If the pin has been configured as a
digital input, the return value will be either ‘0’ or ‘1’.
Precondition:
Must be previously configured as an input via a ConfigureIO call.
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
• pin - the pin number to set (0-7)
• returnvalue - the value read on the pin (‘0’ or ‘1’)
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
None.
EXAMPLE 2-18:
unsigned int rv;
if (SimpleIOClass::ReadGPIOn (0, &rv))
{
lblStatusBar->Text = “Success”;
}
else
lblStatusBar->Text = “Invalid command ” +
 2011 Microchip Technology Inc.
SimpleIOClass::LastError;
DS22228B-page 19
MCP2200
2.3.1.19
ReadPinValue
Function:
int SimpleIOClass::ReadPinValue(unsigned int pin)
Summary:
Reads the specified pin.
Description:
Reads the specified pin and returns the value as the return value. If the pin has been configured as a
digital input, the return value will be either ‘0’ or ‘1’. If an error occurs, the function will return a value
of 0x8000.
Precondition:
Must be previously configured as an input via a ConfigureIO call.
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
pin - the pin number to set (0-7)
Returns:
This function returns the read value of the pin, or returns a value of 0x8000, if an error occurs.
Remarks:
None.
EXAMPLE 2-19:
unsigned int rv;
if (SimpleIOClass::ReadPinValue(0) != 0x8000)
{
lblStatusBar->Text = “Success”;
}
else
lblStatusBar->Text = “Invalid command ” +
2.3.1.20
SimpleIOClass::LastError;
ReadPort
Function:
bool SimpleIOClass::ReadPort(unsigned int *returnvalue)
Summary:
Reads the GPIO port as digital input.
Description:
Reads the GPIO port and returns the value in returnvalue. This provides a means to read all pins
simultaneously, instead of one-by-one.
Precondition:
Must be previously configured as an input via a ConfigureIO call.
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
• pin - the pin number to set (0-7)
• returnvalue - the value read on the pin (‘0’ or ‘1’)
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
Pins configured for output return the current state of the port. Pins configured as input read as zero.
EXAMPLE 2-20:
unsigned int rv;
if (SimpleIOClass::ReadGPIOPort (0, &rv))
{
lblStatusBar->Text = “Success”;
}
else
lblStatusBar->Text = “Invalid command ” +
DS22228B-page 20
SimpleIOClass::LastError;
 2011 Microchip Technology Inc.
MCP2200
2.3.1.21
ReadPortValue
Function:
int SimpleIOClass::ReadPortValue()
Summary:
Reads the GPIO port as digital input.
Description:
Reads the GPIO port and returns the value of the port. This provides a method to read all pins
simultaneously, instead of one-by-one. In case of an error, the returned value will be 0x8000.
Precondition:
Must be previously configured as an input via a ConfigureIO call.
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
None.
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
Pins configured for output return the current state of the port. Pins configured as input read as zero.
EXAMPLE 2-21:
int rv;
rv = SimpleIOClass::ReadPortValue()
if (rv != 0x8000)
{
lblStatusBar->Text = “Success”;
}
else
lblStatusBar->Text = “Invalid command ” +
2.3.1.22
SimpleIOClass::LastError;
SelectDevice
Function:
int SimpleIOClass::SelectDevice(unsigned int uiDeviceNo)
Summary:
Selects one of the active devices in the system.
Description:
The function is used to select one of the detected devices in the system as the “active device”.
Precondition:
At least one call to the InitMCP2200() is required in order to initiate a DLL search for the compatible
devices. Also, in order to know the actual number of devices in the system, call the
SimpleIOClass::IsConnected() function. VID and PID must be previously set via a call to
InitMCP2200(VID, PID).
Parameters:
uiDeviceNo - the ID of the device to be selected (can have a value between 0 and the number of
devices minus 1).
Returns:
This function returns ‘0’ in case of selection success, otherwise it will return:
• E_WRONG_DEVICE_ID (-1) for a device ID that is out of range
• E_INACTIVE_DEVICE (-2) for an inactive device.
Remarks:
Call the SimpleIOClass::IsConnected() prior to the call of this function in order to have the most
recent number of devices that are present in the system.
EXAMPLE 2-22:
int iResult;
iResult = SimpleIOClass::SelectDevice(1)
if (iResult == 0)
{
lblStatusBar->Text = “Success”;
}
else
lblStatusBar->Text = “Error selecting device”;
 2011 Microchip Technology Inc.
DS22228B-page 21
MCP2200
2.3.1.23
SetPin
Function:
bool SimpleIOClass::SetPin(unsigned int pin)
Summary:
Sets the specified pin.
Description:
Sets the specified pin to logic ‘1’.
Precondition:
Must be previously configured as an output via a ConfigureIO or ConfigureIoDefaultOutput call.
VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
pin - the pin number to set (0-7)
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
None.
EXAMPLE 2-23:
if (SimpleIOClass::SetPin (2))
{
lblStatusBar->Text = “Success”;
}
else
lblStatusBar->Text = “Invalid command ” +
2.3.1.24
SimpleIOClass::LastError;
WriteEEPROM
Function:
int SimpleIOClass::WriteEEPROM(unsigned int uiEEPAddress, unsigned char ucValue)
Summary:
Writes a byte into the MCP2200’s EEPROM.
Description:
Writes a byte at the given address into the internal 256 bytes EEPROM.
Precondition:
At least one call to the InitMCP2200() is required in order to initiate a DLL search for the
compatible devices. VID and PID must be previously set via a call to InitMCP2200(VID, PID).
Parameters:
• uiEEPAddress - the EEPROM address location we need to write to (must be from 0 to 255
inclusively).
• ucValue - the byte value required for writing to the given location.
Returns:
This function returns ‘0’ if the write command was successfully sent to the device, otherwise it
returns:
• E_WRONG_ADDRESS (-3) in case the given EEPROM address is out of range
• E_CANNOT_SEND_DATA (-4) in case the function cannot send the command to the device.
Remarks:
The function will send the write EEPROM command, but has no confirmation whether the EEPROM
location was actually written. In order to verify the correctness of the EEPROM write, the user can
issue a SimpleIOClass::ReadEEPROM() and check if the returned value matches the written one.
EXAMPLE 2-24:
int iRetValue = SimpleIOClass::WriteEEPROM(0x01, 0xAB);
if (iRetValue == 0)
{
lblStatusBar->Text = “Success”;
}
else
lblStatusBar->Text = “Error writting to EEPROM” +
DS22228B-page 22
SimpleIOClass::LastError;
 2011 Microchip Technology Inc.
MCP2200
2.3.1.25
WritePort
Function:
bool SimpleIOClass::WritePort(unsigned int portValue)
Summary:
Writes a value to the GPIO port.
Description:
Writes the GPIO port. This provides a means to write all pins at simultaneously, instead of one-byone.
Precondition:
Must be previously configured as an output via a ConfigureIO call. VID and PID must be previously
set via a call to InitMCP2200(VID, PID).
Parameters:
portValue - byte value to set on the port.
Returns:
This function returns True if the transmission is successful and returns False if the transmission fails.
Remarks:
None.
EXAMPLE 2-25:
if (SimpleIOClass::WritePort (0x5A))
{
lblStatusBar->Text = “Success”;
}
else
lblStatusBar->Text = “Invalid command ” +
 2011 Microchip Technology Inc.
SimpleIOClass::LastError;
DS22228B-page 23
MCP2200
NOTES:
DS22228B-page 24
 2011 Microchip Technology Inc.
MCP2200
3.0
ELECTRICAL CHARACTERISTICS
Absolute Maximum Ratings (†)
Ambient temperature under bias......................................................................................................... -40°C to +85°C
Storage temperature ........................................................................................................................ -65°C to +150°C
Voltage on VDD with respect to VSS ................................................................................................... -0.3V to +6.0V
Voltage on MCLR with respect to Vss ................................................................................................. -0.3V to +9.0V
Voltage on VUSB pin with respect to VSS ............................................................................................ -0.3V to +4.0V
Voltage on D+ and D- pins with respect to VSS ...................................................................... -0.3V to (VUSB + 0.3V)
Voltage on all other pins with respect to VSS ........................................................................... -0.3V to (VDD + 0.3V)
Total power dissipation(1) ............................................................................................................................... 800 mW
Maximum current out of VSS pin ...................................................................................................................... 95 mA
Maximum current into VDD pin ......................................................................................................................... 95 mA
Clamp current, IK (VPIN < 0 or VPIN > VDD)20 mA
Maximum output current sunk by any I/O pin.................................................................................................... 25 mA
Maximum output current sourced by any I/O pin .............................................................................................. 25 mA
Maximum current sunk by all ports ................................................................................................................... 90 mA
Maximum current sourced by all ports ............................................................................................................. 90 mA
Note 1:
2:
Power dissipation is calculated as follows: PDIS = VDD x {IDD –  IOH} +  {(VDD – VOH) x IOH} + (VOl x IOL).
VUSB must always be  VDD + 0.3V
† NOTICE: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the
device. This is a stress rating only and functional operation of the device at those or any other conditions above those
indicated in the operation listings of this specification is not implied. Exposure above maximum rating conditions for
extended periods may affect device reliability.
 2011 Microchip Technology Inc.
DS22228B-page 25
MCP2200
3.1
DC CHARACTERISTICS
DC Characteristics
Param
No.
D001
Characteristic
Operating Conditions (unless otherwise indicated):
3.0V VDD  5.5V at -40C  TA  +85C (I-Temp)
Sym
Min
Typ
Max
Units
Supply Voltage
VDD
3.0
—
5.5
V
Power-on Reset
Release Voltage
VPOR
Power-on Reset
Rearm Voltage
D003
VDD Rise Rate to
Ensure Power-on
Reset
D004
Supply Current
D005
1.6
V
0.8
V
0.05
—
—
VDD = 3.0V
—
10
12
mA
VDD = 5.0V
—
13
15
mA
—
9
—
µA
—
—
0.2 VDD
Standby current
SVDD
Conditions
V/ms Design guidance only
Not tested
IDD
IDDS
FOSC = 12 MHz,
(330 nF on VUSB)
Input Low-Voltage
D031
Schmitt Trigger (GPIO)
TTL (CTS pin)
VIL
—
—
0.8
0.8 VDD
—
VDD
3.0V VDD  5.5V
V
4.5V VDD  5.5V
Input High-Voltage
D041
Schmitt Trigger (GPIO)
TTL (RTS pin)
VIH
2.0
—
VDD
—
±50
±100
±50
±200
±50
±100
—
—
0.6
—
—
0.6
VDD – 0.7
—
—
VDD – 0.7
—
—
3.0V VDD  5.5V
V
4.5V VDD  5.5V
Input Leakage Current
GPIO, CTS
D060
RST
IIL
OSC1
VSS VPIN VDD, pin at Hi-Z
nA
Output Low-Voltage
D080
GPIO, UART TX/RX
VOL
V
IOL = 8.0 mA, VDD = 5.0V
IOL = 6.0 mA, VDD = 3.3V
Output High-Voltage
D090
GPIO, UART TX/RX
VOH
V
IOH = -3.5 mA, VDD = 5.0V
IOH = -3.0 mA, VDD = 3.3V
Capacitive Loading Specs on Output Pins
D101
OSC2
COSC2
—
—
15
pF
Note 1
D102
GPIO
CIO
—
—
50
pF
Note 1
Note 1:
This parameter is characterized, but not tested.
DS22228B-page 26
 2011 Microchip Technology Inc.
MCP2200
FIGURE 3-1:
POR AND POR REARM WITH SLOW RISING VDD
VDD
VPOR
VPORR
VSS
NPOR(1)
POR REARM
VSS
TPOR(3)
TVLOW(2)
Note 1:
2:
3:
TABLE 3-1:
USB MODULE SPECIFICATIONS
DC Characteristics
Param
No.
When NPOR is low, the device is held in Reset.
TPOR 1 s typical.
TVLOW 2.7 s typical.
Characteristic
Operating Conditions (unless otherwise indicated):
3.0V VDD  5.5V at -40C  TA  +85C (I-Temp)
Sym
Min
Typ
Max
Units
Conditions
VUSB
3.0
—
3.6
V
Voltage on VUSB pin must be
in this range for proper USB
operation
IIL
—
—
±1
μA
VSS VPIN VDD pin at
high-impedance
D313
USB Voltage
D314
Input Leakage on Pin
D315
Input Low Voltage
for USB Buffer
VILUSB
—
—
0.8
V
For VUSB range
D316
Input High Voltage
for USB Buffer
VIHUSB
2.0
—
—
V
For VUSB range
D318
Differential Input
Sensitivity
VDIFS
—
—
0.2
V
The difference between D+
and D- must exceed this value
while VCM is met
D319
Differential Common
Mode Range
VCM
0.8
—
2.5
V
D320
Driver Output
Impedance(1)
ZOUT
28
—
44

D321
Voltage Output Low
VOL
0.0
—
0.3
V
1.5 kload connected to 3.6V
D322
Voltage Output High
VOH
2.8
—
3.6
V
1.5 kload connected to
ground
Note 1:
The D+ and D- signal lines have been built-in impedance matching resistors. No external resistors,
capacitors or magnetic components are necessary on the D+/D- signal paths between the MCP2200
family device and the USB cable.
 2011 Microchip Technology Inc.
DS22228B-page 27
MCP2200
TABLE 3-2:
THERMAL CONSIDERATIONS
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40C  TA  +85C (I-Temp)
Param
No.
Sym
TH01
θJA
Thermal Resistance Junction to
Ambient
TH02
θJC
Thermal Resistance Junction to
Case
TH03
TH04
TJMAX
PD
Maximum Junction Temperature
Power Dissipation
TH05
TH06
TH07
Note 1:
2:
3:
Characteristic
PINTERNAL Internal Power Dissipation
PI/O
I/O Power Dissipation
Typ
Units
85.2
108.1
36.1
24
24
1.7
150
—
C/W
C/W
C/W
C/W
C/W
C/W
C
W
—
—
W
W
Conditions
20-pin SOIC package
20-pin SSOP package
20-pin QFN 5x5 mm package
20-pin SOIC package
20-pin SSOP package
20-pin QFN 5x5 mm package
PD = PINTERNAL + PI/O
PINTERNAL = IDD x VDD(1)
PI/O =  (IOL * VOL) +  (IOH * (VDD –
VOH))
PDER
Derated Power
—
W
PDER = PDMAX (TJ - TA)/θJA(2,3)
IDD is the current to run the chip alone without driving any load on the output pins.
TA = Ambient Temperature.
TJ = Junction Temperature.
DS22228B-page 28
 2011 Microchip Technology Inc.
MCP2200
3.2
AC Characteristics
3.2.1
TIMING PARAMETER SYMBOLOGY
The timing parameter symbols have been created in one of the following formats:
1. TppS2ppS
T
F
Frequency
E
Error
Lowercase letters (pp) and their meanings:
pp
io
Input or Output pin
rx
Receive
bitclk
RX/TX BITCLK
drt
Device Reset Timer
Uppercase letters and their meanings:
S
F
Fall
H
High
I
Invalid (high-impedance)
L
Low
3.2.2
2. TppS
T
Time
osc
tx
RST
Oscillator
Transmit
Reset
P
R
V
Z
Period
Rise
Valid
High-impedance
TIMING CONDITIONS
The operating temperature and voltage specified in
Table 3-3 apply to all timing specifications unless otherwise noted. Figure 3-2 specifies the load conditions for
the timing specifications.
TABLE 3-3:
TEMPERATURE AND VOLTAGE SPECIFICATIONS - AC
AC CHARACTERISTICS
FIGURE 3-2:
Standard Operating Conditions (unless otherwise stated)
Operating temperature -40C  TA  +85C
Operating voltage VDD range as described in DC spec,
Section 3.1 “DC Characteristics”.
LOAD CONDITIONS
FOR DEVICE TIMING
SPECIFICATIONS
Pin
50 pF (15 pF for OSC2)
 2011 Microchip Technology Inc.
DS22228B-page 29
MCP2200
3.2.3
TIMING DIAGRAMS AND
SPECIFICATIONS
TABLE 3-4:
RESET, OSCILLATOR START-UP TIMER AND POWER-UP TIMER PARAMETERS
Standard Operating Conditions (unless otherwise stated)
Operating Temperature -40°C TA +85°C
Param
No.
Sym
30
TRST
31
32
Characteristic
MCLR Pulse Width (low)
TPWRT Power-up timer
TOST
Oscillator startup time
Min
Typ†
Max
Units
2
—
—
μs
40
65
140
ms
—
1024
—
TOST
Conditions
* These parameters are characterized but not tested.
† Data in “Typ” column is at 5V, 25°C unless otherwise stated. These parameters are for design guidance
only and are not tested.
DS22228B-page 30
 2011 Microchip Technology Inc.
MCP2200
4.0
PACKAGING INFORMATION
4.1
Package Marking Information
20-Lead QFN
Example
XXXXX
XXXXXX
XXXXXX
YWWNNN
20-Lead SOIC
MCP2200
e3
I/MQ^^
1042256
Example:
MCP2200
e3
I/SO ^^
1042256
XXXXXXXXXXXXXX
XXXXXXXXXXXXXX
XXXXXXXXXXXXXX
YYWWNNN
20-Lead SSOP
Example:
XXXXXXXXXXX
XXXXXXXXXXX
YYWWNNN
Legend: XX...X
Y
YY
WW
NNN
e3
*
Note:
MCP2200
I/SS^^
e3
1042256
Customer-specific information
Year code (last digit of calendar year)
Year code (last 2 digits of calendar year)
Week code (week of January 1 is week ‘01’)
Alphanumeric traceability code
Pb-free JEDEC designator for Matte Tin (Sn)
This package is Pb-free. The Pb-free JEDEC designator ( e3 )
can be found on the outer packaging for this package.
In the event the full Microchip part number cannot be marked on one line, it will
be carried over to the next line, thus limiting the number of available
characters for customer-specific information.
 2011 Microchip Technology Inc.
DS22228B-page 31
MCP2200
20-Lead Plastic Quad Flat, No Lead Package (MQ) – 5x5x0.9 mm Body [QFN]
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
Microchip Technology Drawing C04-120A
DS22228B-page 32
 2011 Microchip Technology Inc.
MCP2200
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
 2011 Microchip Technology Inc.
DS22228B-page 33
MCP2200
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DS22228B-page 34
 2011 Microchip Technology Inc.
MCP2200
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
 2011 Microchip Technology Inc.
DS22228B-page 35
MCP2200
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DS22228B-page 36
 2011 Microchip Technology Inc.
MCP2200
Note:
For the most current package drawings, please see the Microchip Packaging Specification located at
http://www.microchip.com/packaging
 2011 Microchip Technology Inc.
DS22228B-page 37
MCP2200
NOTES:
DS22228B-page 38
 2011 Microchip Technology Inc.
MCP2200
APPENDIX A:
REVISION HISTORY
Revision B (March 2011)
The following is the list of modifications:
1.
2.
3.
Added new section Section 1.5.2 “MCP2200
Power Options”.
Updated entire Section 2.3 “Simple Configuration and I/O DLL”.
Added values to parameters TH01 and TH02 for
the 20-Lead 5x5 QFN package in Table 3-2.
Revision A (March 2010)
Original Release of this Document.
 2011 Microchip Technology Inc.
DS22228B-page 39
MCP2200
NOTES:
DS22228B-page 40
 2011 Microchip Technology Inc.
MCP2200
PRODUCT IDENTIFICATION SYSTEM
To order or obtain information, e.g., on pricing or delivery, contact your local Microchip sales office.
PART NO.
X
/XX
Device
Temperature
Range
Package
Device
MCP2200:
MCP2200T:
Reel)
Examples:
a)
USB-to-UART serial converter
USB-to-UART serial converter (Tape and
Temperature Range
I
=
Package
MQ
= Plastic Quad Flat, No Lead Package
5x5x0.9 mm Body (QFN), 20-Lead
= Plastic Small Outline - Wide, 7.50 mm Body (SO),
20-Lead
= Plastic Shrink Small Outline - 5.30 mm Body (SS)
20-Lead
SO
SS
-40C to
 2011 Microchip Technology Inc.
+85C
MCP2200- I/MQ:
b)
Industrial temperature,
20LD QFN Package.
MCP2200T- I/MQ: Tape and Reel,
Industrial temperature,
20LD QFN Package.
a)
MCP2200- I/SO:
b)
MCP2200T- I/SO:
a)
MCP2200- I/SS:
b)
MCP2200T- I/SS:
(Industrial)
Industrial temperature,
20LD SOIC Package.
Tape and Reel,
Industrial temperature,
20LD SOIC Package.
Industrial temperature,
20LD SSOP Package.
Tape and Reel,
Industrial temperature,
20LD SSOP Package.
DS22228B-page 41
MCP2200
NOTES:
DS22228B-page 42
 2011 Microchip Technology Inc.
Note the following details of the code protection feature on Microchip devices:
•
Microchip products meet the specification contained in their particular Microchip Data Sheet.
•
Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
•
There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
•
Microchip is willing to work with the customer who is concerned about the integrity of their code.
•
Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not
mean that we are guaranteeing the product as “unbreakable.”
Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts
allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act.
Information contained in this publication regarding device
applications and the like is provided only for your convenience
and may be superseded by updates. It is your responsibility to
ensure that your application meets with your specifications.
MICROCHIP MAKES NO REPRESENTATIONS OR
WARRANTIES OF ANY KIND WHETHER EXPRESS OR
IMPLIED, WRITTEN OR ORAL, STATUTORY OR
OTHERWISE, RELATED TO THE INFORMATION,
INCLUDING BUT NOT LIMITED TO ITS CONDITION,
QUALITY, PERFORMANCE, MERCHANTABILITY OR
FITNESS FOR PURPOSE. Microchip disclaims all liability
arising from this information and its use. Use of Microchip
devices in life support and/or safety applications is entirely at
the buyer’s risk, and the buyer agrees to defend, indemnify and
hold harmless Microchip from any and all damages, claims,
suits, or expenses resulting from such use. No licenses are
conveyed, implicitly or otherwise, under any Microchip
intellectual property rights.
Trademarks
The Microchip name and logo, the Microchip logo, dsPIC,
KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART,
PIC32 logo, rfPIC and UNI/O are registered trademarks of
Microchip Technology Incorporated in the U.S.A. and other
countries.
FilterLab, Hampshire, HI-TECH C, Linear Active Thermistor,
MXDEV, MXLAB, SEEVAL and The Embedded Control
Solutions Company are registered trademarks of Microchip
Technology Incorporated in the U.S.A.
Analog-for-the-Digital Age, Application Maestro, CodeGuard,
dsPICDEM, dsPICDEM.net, dsPICworks, dsSPEAK, ECAN,
ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial
Programming, ICSP, Mindi, MiWi, MPASM, MPLAB Certified
logo, MPLIB, MPLINK, mTouch, Omniscient Code
Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
PICtail, REAL ICE, rfLAB, Select Mode, Total Endurance,
TSHARC, UniWinDriver, WiperLock and ZENA are
trademarks of Microchip Technology Incorporated in the
U.S.A. and other countries.
SQTP is a service mark of Microchip Technology Incorporated
in the U.S.A.
All other trademarks mentioned herein are property of their
respective companies.
© 2011, Microchip Technology Incorporated, Printed in the
U.S.A., All Rights Reserved.
Printed on recycled paper.
ISBN: 978-1-60932-841-2
Microchip received ISO/TS-16949:2002 certification for its worldwide
headquarters, design and wafer fabrication facilities in Chandler and
Tempe, Arizona; Gresham, Oregon and design centers in California
and India. The Company’s quality system processes and procedures
are for its PIC® MCUs and dsPIC® DSCs, KEELOQ® code hopping
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
analog products. In addition, Microchip’s quality system for the design
and manufacture of development systems is ISO 9001:2000 certified.
 2011 Microchip Technology Inc.
DS22228B-page 43
Worldwide Sales and Service
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ASIA/PACIFIC
ASIA/PACIFIC
EUROPE
Corporate Office
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Chandler, AZ 85224-6199
Tel: 480-792-7200
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Technical Support:
http://support.microchip.com
Web Address:
www.microchip.com
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Fax: 248-538-2260
Kokomo
Kokomo, IN
Tel: 765-864-8360
Fax: 765-864-8387
Los Angeles
Mission Viejo, CA
Tel: 949-462-9523
Fax: 949-462-9608
Santa Clara
Santa Clara, CA
Tel: 408-961-6444
Fax: 408-961-6445
Toronto
Mississauga, Ontario,
Canada
Tel: 905-673-0699
Fax: 905-673-6509
Australia - Sydney
Tel: 61-2-9868-6733
Fax: 61-2-9868-6755
China - Beijing
Tel: 86-10-8528-2100
Fax: 86-10-8528-2104
China - Chengdu
Tel: 86-28-8665-5511
Fax: 86-28-8665-7889
Korea - Daegu
Tel: 82-53-744-4301
Fax: 82-53-744-4302
China - Chongqing
Tel: 86-23-8980-9588
Fax: 86-23-8980-9500
Korea - Seoul
Tel: 82-2-554-7200
Fax: 82-2-558-5932 or
82-2-558-5934
China - Hong Kong SAR
Tel: 852-2401-1200
Fax: 852-2401-3431
Malaysia - Kuala Lumpur
Tel: 60-3-6201-9857
Fax: 60-3-6201-9859
China - Nanjing
Tel: 86-25-8473-2460
Fax: 86-25-8473-2470
Malaysia - Penang
Tel: 60-4-227-8870
Fax: 60-4-227-4068
China - Qingdao
Tel: 86-532-8502-7355
Fax: 86-532-8502-7205
Philippines - Manila
Tel: 63-2-634-9065
Fax: 63-2-634-9069
China - Shanghai
Tel: 86-21-5407-5533
Fax: 86-21-5407-5066
Singapore
Tel: 65-6334-8870
Fax: 65-6334-8850
China - Shenyang
Tel: 86-24-2334-2829
Fax: 86-24-2334-2393
Taiwan - Hsin Chu
Tel: 886-3-6578-300
Fax: 886-3-6578-370
China - Shenzhen
Tel: 86-755-8203-2660
Fax: 86-755-8203-1760
Taiwan - Kaohsiung
Tel: 886-7-213-7830
Fax: 886-7-330-9305
China - Wuhan
Tel: 86-27-5980-5300
Fax: 86-27-5980-5118
Taiwan - Taipei
Tel: 886-2-2500-6610
Fax: 886-2-2508-0102
China - Xian
Tel: 86-29-8833-7252
Fax: 86-29-8833-7256
Thailand - Bangkok
Tel: 66-2-694-1351
Fax: 66-2-694-1350
Italy - Milan
Tel: 39-0331-742611
Fax: 39-0331-466781
Netherlands - Drunen
Tel: 31-416-690399
Fax: 31-416-690340
Spain - Madrid
Tel: 34-91-708-08-90
Fax: 34-91-708-08-91
UK - Wokingham
Tel: 44-118-921-5869
Fax: 44-118-921-5820
China - Xiamen
Tel: 86-592-2388138
Fax: 86-592-2388130
China - Zhuhai
Tel: 86-756-3210040
Fax: 86-756-3210049
08/04/10
DS22228B-page 44
 2011 Microchip Technology Inc.