![]() ![]() ![]() It is based on HCMOS Technology and has a common internal bus for the address and data of 8-bits.Memory mapped I/O and special functions.Six powerful addressing modes (Immediate, Extended, Indexed, Inherent and Relative).MC68HC11 has one universal Asynchronous Serial Communications Interface (UART).Similarly in a 52 PLCC pack 42 pins are meant for different I/O functions, and the remaining are used for interrupt and handshake signals.In the 48 pin DIP package 38 pins are available for I/O functions.(34 I/O lines+ 2 interrupt lines + 2 hand shake control lines).One is 48-pin dual inline package (DIP) and the other is the 52 Pin Plastic Leaded Chip Carrier(PLCC) known as Lead quad pack.The MC68HC11 is available in two packages.One serial peripheral interface, with a speed up to 1M (baud rate).Eight channel 8-bit Analog to Digital Convertor.256 Bytes of RAM, 512 Bytes of In-System Programmable EEPROM.The HCMOS MC68HC11 is an advanced 8-bit MCU with numerous on-chip peripheral capabilities.Test mode : used by Motorola to test the chip is operation Bootstrap mode: used to load programs into RAM. Expanded mode :allows for use of external memory. The 6811 can operate in one of the four modes: Single-chip mode: uses internal memory for program & data. The 68HC11 chip has built-in EEPROM/ROM, RAM, digital I/O, timers, A/D converter, PWM (Pulse width modulator) generator, and synchronous and asynchronous communications channels. ![]() It is a CISC microcontroller, optimized for low power consumption and high-performance operation. ![]() Now it is produced by Freescale Semiconductors.
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