■ DESCRIPTION

MB86941 and MB86942 are dedicated peripheral LSIs for SPARClite*.

The MB86941 and MB86942 are designed to enable compact configuration of high-performance systems with SPARClite architecture, and provide the following features.

■ FEATURES

Direct connection to SPARClite

Register read/write in 2 clock cycles up to 30MHz.

Register read/write in 3 clock cycles at 40MHz (MB86941) or 50MHz (MB86942).

Built-In On-Chip Modules:

? Interrupt controller

Interrupt input: 15 channels

Each interrupt input has independent masking and trigger mode settings

? 16-bit timer: 4 channels

Two of the four channels have prescalers

Each channel has five independent mode operations

MODE0 : Periodical-interrupt

MODE1 : Timeout-interrupt

MODE2 : Square wave generator

MODE3: Programmable one shot (software trigger)

MODE4: Programmable one shot (external trigger)

? SDTR (Serial data transmitter receiver): 2 channels MB89251A type

? Timing control, CS expansion

Generates read, write and data strobe signals according to the requirements of external devices.

? SIO (Synchronous serial input/output)

Simple synchronous type serial input/output

? I/O port, 16-bit

Individual direction control by bit

5V single power supply (MB86941), 3.3V single power supply (MB86942) Upward pin compatibility with MB86940C