PC-I2C-KIT Datasheet PC-I2C-KIT | P7-P9

4.4 I

C Operation

4.4.1 On-Board EEPROM (U2)

The on-board EEPROM socket U2 provides support for the included

PCF8582 as well as most I²C EEPROMs in an 8-pin DIP package. The

PC-I2C Software allows programming of most I²C EEPROMs at the

default address.

Note: The default I²C address for this on-board EEPROM device is 0xA8.

If an external I²C device using this address (0xA8) is connected to the PC-

I2C Board, the EEPROM in socket U2 should be removed to avoid

address conflicts.

4.4.2 Connecting the PC-I2C Board to your peripheral

Included in the PC-I2C-KIT is an 18” four-conductor cable for connecting

the PC-I2C Board to another I²C Board. Extreme care should be taken to

verify the proper power & ground connections. The PC-I2C Board or your

I²C Board may be damaged by improper connection of this cable. The PC-

I2C Board provides a connector (J2) for use with external I²C peripherals.

This connector supports the common pinout used on other I²C

development and demonstration boards. This allows direct connection to

the PC-I2C Board with the included one-to-one cable.

4.4.3 Configuring the PC-I2C Board

For normal operation, no configuration changes should be required on the

PC-I2C Board.

The jumper on JP2 must be in the 2-3 position. This setting configures the

PC-I2C Board for target power supply. The target board must then provide

power to the PC-I2C Board via the connection. The PC-I2C Board

requires 1.2 – 5.5VDC at a maximum of 35 mA with typical current

consumption at approximately 16 mA. This allows the PC-I2C to be used

with other boards operating at 1.2 VDC – 5.5 VDC.

4.5 MDIO Operation

4.5.1 MDIO Support

PC-I2C supports and has been tested for IEEE 802.3 serial

communications using clause 22 and clause 45. Information regarding

IEEE standards can be found at www.ieee.org. DDF and SDF files,

outlined in Appendix G and Appendix H respectively, can be used for

MDIO operations. If you purchased a PC-I2C-DEV, there are also

functions available for programs using MDIO.

4.5.2 MDIO Setup of the PC-I2C Board

For normal MDIO operation, follow the General Operations in section 4

keeping in mind that the SCL line is equivalent to the MDC line and the

SDA line is equivalent to the MDIO line. No configuration changes should

be required on the PC-I2C Board. The PC-I2C Board also includes one

connector (J3) for MDIO. This connector supports the common pinout

used for communication with other MDIO boards.

The jumper on JP2 must be in the 2-3 position. This setting configures the

PC-I2C Board for target power supply. The target board must then provide

power to the PC-I2C Board via the connection. The PC-I2C Board

requires 1.2 – 5.5VDC at a maximum of 35 mA with typical current

consumption at approximately 16 mA. This allows the PC-I2C Board to be

used with MDIO target boards operating at 1.2 VDC – 5.5 VDC. Since the

MDIO spec is less than 5VDC, setting JP2 to PC power is not an option

because it may damage the MDIO device. This is due to the PC Parallel

Port’s power output voltage of 5VDC. The jumper on JP2 must be in the

2-3 position.

Note: If JP2 is set to anything other than target power (2-3) in MDIO

operation serious damage to the target board can occur.

4.5.3 On board I2C EEPROM

The included I2C PCF8582C EEPROM will not respond unless an I2C

Start Condition is generated. Due to this the EEPROM should not interfere

with normal MDIO operation because an MDIO Preamble is High where

as an I2C Start Condition is Low. However, if a device does respond in

such a way as to generate a start condition, the EEPROM must be

removed from the board.

Note: Keep this EEPROM in case a return or repair is necessary later.

4.6 SPI Operation

4.6.1 SPI Support

PC-I2C supports general SPI serial communications. Information

regarding SPI can be found in each device’s datasheet. DDF and SDF

files, outlined in Appendix G and Appendix H respectively, can be used for

SPI operations. If you purchased a PC-I2C-DEV, there are also functions

available for programs using SPI.

4.6.2 SPI Setup of the PC-I2C Board

For normal SPI operation, follow the General Operations in section 4.

There are a few changes to keep in mind:

• J1 should be used for SPI operation.

• When connecting your device, the CS# line on J1 should be connected

to the Chip Select (CS) line or the Chip Enable (CE) line on your target

device.

• The DIN line on J1 should be connected to the Data Out (DO) line on

the target device.

• The DOUT line on J1 should be connected to the Data In (DI) line on

the target device.

• JP3 must be configured in the 1-2 position for SPI operation.

The jumper on JP2 must be in the 2-3 position. This setting configures the

PC-I2C Board for target power supply. The target board must then provide

power to the PC-I2C Board via the connection. The PC-I2C Board

requires 1.2 – 5.5VDC at a maximum of 35 mA with typical current

consumption at approximately 16 mA. This allows the PC-I2C Board to be

used with SPI target boards operating at 1.2 VDC – 5.5 VDC.

Note: If JP2 is set to anything other than target power (2-3) in SPI

operation damage to the target board may occur.

4.6.3 On board I2C EEPROM

The included I2C PCF8582C EEPROM will not respond unless an I2C

Start Condition is generated. Due to this the EEPROM should not interfere

with normal SPI operation because SPI never requires a change in the

data line during a high clock. However, if a device does respond in such a

way as to generate a start condition, the EEPROM must be removed from

the board.

Note: Keep this EEPROM in case a return or repair is necessary later.

P1-P3 P4-P6 P7-P9 P10-P12 P13-P15 P16-P18 P19-P21 P22-P24 P25-P27 P28-P28

PC-I2C-KIT

Mfr. #:

Buy PC-I2C-KIT

Manufacturer:

Future Designs, Inc. (FDI)

Description:

Interface Development Tools Let Your PC Talk I2C Version 3.3a Upgrade

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New from this manufacturer.

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