Overview

The MSM66591/ML66592 are high performance 16-bit microcontrollers that contain a 16-bit CPU (nX-8/500S), ROM, RAM, a 10-bit A/D converter, serial ports, flexible timers, and PWMs.

The ML66592 is the same as the MSM66591 with the exception that the ML66592 has an increased ROM and RAM capacity and a higher operating speed. Table 1-1 lists the functional differences between the MSM66591 and ML66592.

The MSM66Q591 is a Flash EEPROM version of the MSM66591. The ML66Q592 is a Flash EEPROM version of the ML66592.

Features

Abundant Instruction Set

• Instruction set has superb orthogonal capability

• 8/16-bit arithmetic instructions

• Multiplication/division instructions

• Bit operation instructions

• Bit logic operation instructions

• ROM table reference instructions

Abundant Addressing Modes

• Register addressing

• Page addressing

• Pointing register indirect addressing

• Stack addressing

• Immediate addressing

Minimum Instruction Cycle

MSM66591: 83.3 nsec @ 12 MHz (internal: 24 MHz)

ML66592: 71.4 nsec @ 14 MHz (internal: 28 MHz)

Program Memory (ROM)

MSM66591: Internal: 128K bytes External: 128K bytes, EA pin active

ML66592: Internal: 192K bytes External: 256K bytes (EA pin active)

Data memory (RAM)

MSM66591: Internal: 6K bytes

ML66592: Internal: 8K bytes

I/O Ports

• Analog input ports: 24

• I/O ports: 98

Multiplier

MSM66591: MUL ERn instruction: 208 nsec @ 12 MHz

ML66592: MUL ERn instruction: 178.6 nsec @ 14 MHz

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