The Freescale KL25Z is a popular ARM microcontroller designed and marketed by the Freescale, which is now part of NXP Corp. It comes with some powerful peripherals such as ADC, Timer, SPI, I2C, UART, and so on. Due to popularity of ARM architecture, many semiconductor design companies are moving away from proprietary architecture and adopting the ARM as the CPU of choice in all their designs. Why this book? Currently there is no other textbook for Freescale KL25Z microcontroller. This textbook covers the details of the KL25Z chip such as ADC, Timer, SPI, I2C and so on with ARM programs. It also includes the programs for interfacing of KL25Z to LCD, Serial COM port, DC motor, stepper motor, sensors, and graphics LCD. All the programs in the book are tested using Keil with KL25Z trainer board from Freescale. See the following link for our other books on ARM: http: //www.microdigitaled.com/ARM/ARM_books.htm