MCP2150T-I/SS - Microchip Technology

MCP215X

The MCP215X parts you have received conform

functionally to the device data sheets (DS21655A and

DS21690A), except for the anomalies described below.

All of the issues listed here will be addressed in

Revision B of the MCP215X silicon.

1. Module: IR Protocol Handler

When the Primary Device has initiated IR

communication with the MCP215X, and the

Primary Device is removed before the MCP215X

enters Discovery mode, the MCP215X will lock-

up.

Work around

Ensure that communication between the Primary

and Secondary IS NOT interrupted during initial

communication. If the MCP215X has not indicated

a valid link for a given timeframe (as determined by

the application), then the MCP215X will need to be

reset.

2. Module: Host UART

If the MCP215X does not have a link established

in Normal Connect Mode (NCM), overflowing the

Host UART buffer will lock up the device.

Work around

The Host Controller firmware must respect the

Host UART CTS Flow Control signal, as is

indicated in the data sheet.

3. Module: IR Protocol Handler

If an unexpected command or response from the

Palm PDA occurs during the Discovery phase, the

MCP215X may lock up. This is due to the Palm

Operating System (Palm OS®) terminating

Discovery when the IrDA® Standard Secondary

Device transmits an unexpected response to the

Palm OS. The MCP215X will lock up when the

Primary Device aborts Discovery phase.

Work around

The MCP215X will need to be reset if the

MCP215X has not indicated a valid link for a given

timeframe (as determined by the application).

4. Module: IR Protocol Handler

The MCP215X does not properly monitor the

number of packets received by the Primary. If the

number of packets received by the Primary does

not match the number sent, the link may shut

down.

Work around

The Primary Device may reestablish a link to the

MCP215X (the Secondary Device) as permitted by

the application.

5. Module: Test Escapes

The test flow for some MCP215X devices was not

adhered to. Devices with the following Traceability

Codes do not function (will not communicate with

the UART port or IR port) and should be replaced.

Work around

Contact your Microchip sales representitive to

authorize a RMA to exchange these devices.

6. Module: Host UART

The state of the DSR pin correctly indicates when

the MCP2150 has initialized after a device reset

(until an IR link is established), but will continue to

track the state of the CD pin after a link has been

established.

Work around

Monitor the DSR pin to determine when the device

has completed initialization until a link is

established. The DSR pin can then be ignored until

the next time the Host Controller resets the

MCP2150.

Note: For Palm® PDA applications only

Package Traceability Code

PDIP 0145H9K

0215G9B

SOIC 0215G9U

SSOP 0210GUQ

Note: For the MCP2150 only

MCP215X Rev. A Silicon/Data Sheet Errata

MCP215X

7. Module: IR Protocol Handler

The MCP215X issues two RR packets upon entry

into Normal Response Mode (NRM) prior to the

Primary Device sending a packet.

This does not appear to be a compatibility issue

with current IrDA compatible devices.

Work around

None

Clarifications/Corrections to the Data

Sheet:

In the device data sheets, DS21655A and DS21690A,

the following clarifications and corrections should be

noted:

None.

Enhancements for Rev B Devices:

The following device enhancements should be noted

for Silicon Rev. B devices (from Silicon Rev. A devices):

1. The MCP2150 now has retransmit capability for

outgoing IR Packets. This retransmission

occurs when the number of “packets” sent does

not match the number “packets” received. The

MCP215X will attempt to retransmit a “packet”

only a limited number of times.

2. The Host UART Receive Buffer window (# of

bytes that MCP2150 Host UART can receive

before de-asserting CTS) was increased from

40 to 60 bytes. This provides consistency with

the MCP2155.

3. Increased the number of initial BOF characters

from 1 BOF to 11 BOF for better compatibility

with future IrDA Standard devices.

MCP215X

APPENDIX A: REVISION HISTORY

Revision A (February 2006)

• Initial release of this document.

MCP215X

APPENDIX B: SILICON REVISION

HISTORY

Table B-1 and the “Package Marking Information”

sections indicate how to determine the Revision of the

MCP215X device you have. The Revision information

can be determined by the Year and Week Codes of

manufacture, which are printed on the device.

TABLE B-1: SILICON REVISION/DEVICE

MARKING

Package Marking Information

Silicon

Revision YYWWNNN

Rev A All devices before: 0231NNN

Rev B All devices on or after: 0231NNN

Legend: ‘N’ is any alphanumeric character.

18-Lead PDIP

18-Lead SOIC

20-Lead SSOP

Legend: XX...X Customer specific information*

YY Year code

(last 2 digits of calendar year)

WW Week code

(week of January 1 is week ‘01’)

NNN Alphanumeric traceability code

Note: 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.

*Standard marking consists of Microchip part

number, year code, week code, and traceability

code.

MCP2150I/SS

XXXXXXXXXXX

XXXYYWWNNN

MCP2150-I/SO

XXXXXXXXXXXXXXXXX

XXXXXYYWWNNN

MCP2150-I/P

XXXXXXXXXXXXXXXXX

XXXXXYYWWNNN

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Note the following details of the code protection feature on Microchip devices:

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intended manner and under normal conditions.

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