User manual

Getting Started

For example, to read seconds from the real-time clock:

Step 1 – Enter 0xA2 into the Slave Address[W] block in the Read section of the Basic

Operations window (top half of window)

Step 2 – Enter 0x02 into the Word Address block

Step 3 – Note that the Slave Address[R] has already been entered for you (the Read

bit is set).

Step 4 – Enter 0x01 into the Byte Count block

Step 5 – Click on the Execute button

The I

C combination command (Write then Read) will be sent to the 28-Pin Demo

Board. The command and the contents of Word Address 0x02 (seconds) will be

displayed in the transaction window as shown in Figure 2-7.

FIGURE 2-7: RTC TRANSACTIONS DEMO

2.8.2 EEPROM

The Slave address for the emulated Serial EEPROM on the 28-Pin Demo Board is

hexadecimal A8 (0xA8). The Word Address selects one of 256 8-bit memory locations:

TABLE 2-2: WORD ADDRESS CONTENTS

2.8.3 ADC

The Slave address for the ADC on the 28-Pin Demo Board is hexadecimal AA (0xAA).

The Word Address 0x01 selects the memory location containing the Most Significant 8

bits of the 10-bit ADC of the PIC microcontroller.

2.9 28-PIN DEMO I

C™ SOURCE CODE AND FIRMWARE

The demo program source code and *.hex file can be found on the PICkit Serial

CD-ROM at D:\28-pin Demo Board\Firmware\

Word Address Contents

0x00 Memory Contents

… …

0xFF Memory Contents