Features: • Static EC000 Core Processor-Identical to MC68EC000 Microprocessor
-Full compatibility with MC68000 and MC68EC000
-24-bit address bus, for 16-Mbyte off-chip address space
-16-bit on-chip data bus for MC68000 bus operations
-Static design allows processor clock to be stopped providing dramatic power savings
-2.4 MIPS performance at 16.67-MHz processor clock
• External M68000 Bus Interface with Dynamic Bus Sizing for 8-bit and 16-bit Data Ports
• External 8-Bit Data Bus Interface (8051-Compatible)
• M-Bus Module
-Provides interchip bus interface for EEPROMs, LCD controllers, A/D converters, etc.
-Compatible with industry-standard I2 C bus
-Master or slave operation modes, supports multiple masters
-Automatic interrupt generation with programmable level
-Software-programmable clock frequency
-Data rates from 4100 Kbit/s above 3.0-MHz system clock
• Universal Asynchronous Receiver/Transmitter (UART) Module
-Flexible baud rate generator
-Based on MC68681 Dual Universal Asynchronous Receiver/Transmitter (DUART) programming model
-5 Mbits/s maximum transfer rate at 16.67-MHz system clock
-Automatic interrupt generation with programmable level
-Modem control signals available (CTS,CTS)
• Timer Module
-Dual channel 16-bit general purpose counter/timer
-Multimode operation, independent capture/compare registers
-Automatic interrupt generation with programmable level
-Third 16-bit timer configured as a software watchdog
-60-ns resolution at 16.67-MHz system clock
-Each timer has an input and an output pin
• System Integration Module (SIM07), Incorporating Many Functions Typically Relegated to External Programmable
Array Logic (PALs), Transistor-Transistor Logic (TTL), and ASICs, such as:
-System configuration, programmable address mapping
-System protection by hardware watchdog logic
-Power-down mode control, programmable processor clock driver
-Four programmable chip selects with wait state generation logic
-Three simple peripheral chip selects
-Parallel input/output ports, some with interrupt capability
-Programmed interrupt vector response for on-chip peripheral modules
-IEEE 1149.1 boundary scan test access port (JTAG)
• Operation from DC to 16.67 MHz (Processor Clock)
• Operating Voltages of 3.3V ± 0.3V and 5V ± 0.5V
• Compact 100-Lead Quad Flat Pack (QFP) PackagePinout
DescriptionThe MC68307 is an integrated processor combining a static 68EC000 processor with multiple interchip bus interfaces. The MC68307 is designed to provide optimal integration and performance for applications such as digital cordless telephones, portable measuring equipment, and point-of-sale terminals. By providing 3.3 V, static operation in a small package, the MC68307 delivers cost-effective performance to handheld, batterypowered applications.
The MC68307 (shown in Figure 1) contains a static EC000 core processor, multiple bus interfaces, a serial channel, two timers, and common system glue logic. The multiple bus interfaces include: dynamic 68000 bus, 8051 bus, and Motorola bus (M-bus) or I2 C bus1 . The dynamically sized 68000 bus allows 16-bit performance out of static random access memory (SRAM) while still providing a low-cost interface to an 8-bit read-only memory (ROM). The 8051 bus interfaces gluelessly to 8051-type devices and allows the reuse of applicationspecific integrated circuits (ASICs) designed for this industry standard bus. The M-bus is an industry standard 2-wire interface which provides efficient communications with peripherals such as EEPROM, analog/digital (A/ D) converters, and liquid crystal display (LCD) drivers. Thus, the MC68307 interfaces gluelessly to boot ROM, SRAM, 8051 devices, M-bus devices, and memory-mapped peripherals. The MC68307 also incorporates a slave mode which allows the EC000 core to be turned off, providing a 3.3-V static, low-power multi-function peripheral for higher performance M68000 family processors.
MC68307 Data Sheet
