Description

The CXD1185C is a high performance CMOS SCSI controller LSI that conforms to ANSIX3. 131- 1986 standards. The CXD1185C is capable of operating in both initiator and target modes. It satisfies all standard SCSI bus features, such as arbitration, selection and parity generation/check functions. A 24-bit data transfer byte counter and 16-byte FIFO are built into the hardware.

Features

• Satisfies all SCSI bus features, including arbitration, selection, parity generation/check and synchronous data transfer.

• Maximum synchronous data transfer rate of 4.0 MB/s and maximum asynchronous data transfer rate of 2.5 MB/s.

• Provides two separate ports for the data bus and the CPU bus.

• Built-in user-programmable timer for selection /reselection time-out operation.

• Supports 8-bit microcomputer bus.

• Support programmed I/O and DMA transfer.

• Built-in 48 mA (sinking) SCSI port. The SCSI port can be used as either single-ended port or differential port.

• Built-in 24-bit data transfer counter.

• Built-in 16-byte FIFO.

• Supports SCSI phase commands.

• All SCSI control signal are software controllable.

• All interrupt conditions are software maskable.

• Built-in 4-bit general-use I/O port.

• Programmable SCSI RST drive time.

• Programmable interrupt pin (IRQ) active logic level.

• Single initiator mode detection logic.

• Selection phase SCSI parity check/ignore switch.

• Pin compatible with CXD1185AQ. (CXD1185CQ only)

• Comes in 64-pin QFP or 64-pin LQFP

Applications

SCSI controller