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1. SERIAL COMMUNICATION INTERFACE MOTOROLA 68HC11 SERIAL
2. SERIAL COMMUNICATION INTERFACE MOTOROLA 68HC11 DRIVER
3. SERIAL COMMUNICATION INTERFACE MOTOROLA 68HC11 UPGRADE
4. SERIAL COMMUNICATION INTERFACE MOTOROLA 68HC11 FULL

The CPU Registers are shown in the next slide.

SERIAL COMMUNICATION INTERFACE MOTOROLA 68HC11 SERIAL

Z68HC11 has 2 subsystems for serial interfacing zthe serial communication interface (SCI) that can be used to connect a terminal or personal computer.Ħ8HC11 Registers: 68HC11 Registers The MC68HC11 microcontroller has a rich set of registers and they are classified into two categories: CPU registers and I/O registers. Mc68hc11a8 technical data serial communications interface motorola 5-13 5 5 motorola 5-14 serial communications interface. Port A has input capture, output compare, pulse accumulator, and other timer functions port D has serial I/O, and port E has an (ADC). When placed on the external address bus, it replicates the original functions of B and C. The robotics controller by Fred Martin is based on the 68HC11.Ī MC68HC24 port replacement unit is available for the HC11. The microcontroller family is an enhanced version of the 68HC11.

SERIAL COMMUNICATION INTERFACE MOTOROLA 68HC11 UPGRADE

Other versions The microcontroller family is intended as a mostly software compatible upgrade of the 68HC11. BUFFALO can also run on devices that do not have internal non-volatile memory, such as the 68HC11A0, A1, E0, E1, and F1 derivatives. The standard monitor for the HC11 family is called BUFFALO, 'Bit User Fast Friendly Aid to Logical Operation.' It can be stored in on-chip ROM, EPROM, or external memory (also typically EPROM).īUFFALO is available for most 68HC11 family derivatives as it generally only depends upon having access to a single UART (SCI, or Serial Communications Interface, in Motorola parlance). The cost of the evaluation kit was $68.11. 52-pin (PLCC) In the early 1990s Motorola produced an evaluation board kit for the 68HC11 with several UARTs, RAM, and an EPROM. In this mode, port C is to carry both the lower byte of the address and data. With external memory, B and C are used as and. It can be operated with an internal program and (1 to 768 bytes) or an external memory of up to 64. Each port is eight-bits wide except for D, which is six bits (in some variations of the chip, D also has eight bits). The most common version has five ports, A, B, C, D, and E, but some have as few as 3 ports (version D3). Bit test operations have also been added, performing a logical AND function between operands, setting the correct conditions codes, but not modifying the operands.ĭifferent versions of the HC11 have different numbers of external ports, labeled alphabetically. A range of 16-bit instructions treat the A and B registers as a combined 16-bit D register for comparison (X and Y registers may also be compared to 16-bit memory operands), addition, subtraction and shift operations, or can add the B accumulator to the X or Y index registers.

SERIAL COMMUNICATION INTERFACE MOTOROLA 68HC11 FULL

In addition, there is an 8 x 8-bit multiply (A x B), with full 16-bit result, and Fractional/Integer 16-bit by 16-bit Divide instructions. It has two, A and B, two, X and Y, a condition code register, a 16-bit, and a. (Instructions using the Y register have prefixed with the byte 18). 68HC11 block diagram Internally, the HC11 is upward compatible with the, with the addition of a Y.

SERIAL COMMUNICATION INTERFACE MOTOROLA 68HC11 DRIVER

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