Description:

The UM82C088 is an IC specifically designed to function as the peripheral controller for 8088 microprocessors in an IBM PC/XT compatible computer. It is implemented in 1.5n CMOS technology and is packaged in a 100-pin plastic flat package.

Features:

• Fully IBM-PC/XT compatible
• 82C84 Clock generator with 2 clock-inputs to generate the CPU clock. These are 14.318 MHz and 30 MHz which will support 4.77 MHz and 10 MHz CPU clocks with 1 /3 duty cycle.
• 82C88 Bus Controller
• 82C37 4 channel DMA controller, channel 0 is used for DRAM refresh
• 82C59 8 channel interrupt controller, level 0 is used for system time base, and level 1 for keyboard input
• 82C53 3 channel timer, channel 0 is used for system time base, channel 1 for DRAM refresh, and channel 2 for speaker audio
• 82C55 Peripheral I/O, used for keyboard interface and system configuration switch (same as the PC/XT)
• 74322 Keyboard interface, supports PC/XT type keyboard
• 74280 Parity check and generator
• 74670 4-bit page register for DMA
• Wait state logic
• NMI control logic
• ROM decoder for one 2764 and one 27256
• RAM decoder for 4164 or 41256 DRAM
• H/W and S/W CPU speed change and indicator
• Built-in delay line for RAS, CAS
• Low power consumption: less than 300mW at 10 MHz CPU speed
• Small PCB size: 100 pin plastic Flat package