Rochester Electronics A82370-16

The 82370 is a multifunction support peripheral that integrates the system functions required in an 80376 environment. It features 8 high-performance 32-bit DMA channels (32-bit internal, 16-bit external), enabling efficient data transfer rates on the 80376 bus. The device integrates system support peripherals including interrupt control, timers, wait-state generation, DRAM refresh control, and system reset logic. Its DMA controller can transfer data between devices of different data path widths using a single channel. Each DMA channel operates independently in multiple modes, and each channel has a temporary data storage register for handling misaligned data, eliminating the need for external alignment logic.

• High-performance 32-bit DMA controller for 16-bit bus
• Maximum data transfer rate of 16 MBytes/Sec at 10 MHz
• 8 independently programmable channels
• 20-source interrupt controller with individually programmable interrupt vectors, 15 external and 5 internal interrupts; superset of 82C59A
• Four 16-bit programmable interval timers, compatible with 82C54
• Software compatible with 82380
• Programmable wait-state generator: 0–15 wait states in pipelined mode, 1–16 wait states in non-pipelined mode
• DRAM refresh controller
• 80376 shutdown detection and reset control with software/hardware reset support
• High-speed CHMOS II technology
• Available in 100-pin plastic QFP and 132-pin PGA packages
• Optimized for use with the 80376 microprocessor; resides on local bus for maximum bus bandwidth at 16 MHz clock frequency