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MC68121

Motorola
Part Number MC68121
Manufacturer Motorola
Description INTELLIGENT PERIPHERAL CONTROLLER
Published Nov 26, 2019
Detailed Description ® ItIIOTOROLA Advance Information INTELLIGENT PERIPHERAL CONTROLLER The MC68120/MC68121 Intelligent Peripheral Controlle...
Datasheet PDF File MC68121 PDF File

MC68121
MC68121

Overview
® ItIIOTOROLA Advance Information INTELLIGENT PERIPHERAL CONTROLLER The MC68120/MC68121 Intelligent Peripheral Controller (lPCI is a general purpose, mask programmable peripheral controller.
The IPC provides the interface between an M68000 or M6800 Family microprocessor and the final peripheral devices through a system bus and control lines.
System bus data is transferred to and from the IPC via dual-port RAM while the software utilizes the semaphore registers to control RAM tasking or any other shared resource.
Multiple operating I modes range from a single chip mode with 21 I/O lines and 2 control lines to an expanded mode supporting an address space of 64K bytes.
The MC68120 has 2K bytes of on-chip ROM to make full use of all operating modes.
The MC68121 utilizes only the expanded address modes, due to the absence of on-chip ROM.
A serial communications interface, 16-bit timer, dual-ported RAM and semaphore registers are available for use by the IPC in all operating modes.
• System Bus Compatible with the Asynchronous M68000 Family • System Bus Compatible with the MC6809 and Other M6800 Family Processors/ Peripherals • Local Bus Allows Interface with all M6800 Peripherals • MC6801 Source and Object Code Compatible • Upward Compatible with MC6800 Source and Object Code • 2048 Bytes of ROM (MC68120 Only) • 128 Bytes of Dual-Ported RAM • Multiple Operation Modes Ranging from Single Chip to Expanded, with 64K Byte Address Space • Six Shared Semaphore Registers • 21 Parallel I/O Lines and 2 Handshake Lines (5 I/O Lines on MC68121) • Serial Communications Interface (SCI) • 16-Bit Three-Function Timer • 8-Bit CPU and Internal Bus • Halt/Bus Available Capability Control • 8 x 8 Multiply Instruction • TTL Compatible Inputs and Outputs • External and Internal Interrupts Package Type Ceramic L Suffix GENERIC INFORMATION (TA=O°C to 70°C) Frequency (MHz) 1.
0 1.
0 1.
25 1.
25 Generic Number MC68120Ll (Unicorn ROM) MC68121 L MC68120Ll-l (Unicorn ROM) MC68121L-l This document ...


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