GENERAL DESCRIPTION
The MSM65522 is a high-performance 8-bit microcontroller that employs OKI original nX-8/50 CPU core. With a minimum instruction execution time of 400 ns (10MHz clock), the MSM65522 is capable of high-speed processing, and includes 8K bytes of program memory, 384 bytes of data memory (RAM), timers, serial ports and an A/D converter on chip. Also available is the MSM65P522, which replaces the on-chip program memory with one-time PROM.

FEATURES
• Operating range
Operating frequency : 1 to 10MHz (VDD=4.5 to 5.5V)
                            1 to 5MHz (VDD=2.7 to 5.5V)
Operating voltage : 2.7 to 5.5V
Operating temperature : – 40 to +85°C
• Memory space
Internal program memory : 8K bytes
Internal data memory : 384 bytes
• Minimum instruction execution time : 400ns @ 10 MHz
• Powerful instruction set : 81 basic instructions
                                  8/16-bit operation instructions
                                   Bit manipulation instructions
                                  Compound function instructions
• Abundant addressing modes
• I/O ports : 8-bit x 3
4-bit x 1
Input only port : 8-bit x 1
• Timers : 8-bit auto-reload timer x 3(One timer is shared by the baud rate generator. Combining the 8-bit timers, it is possible to use the timers as a 16-bit timer (1 channel).)
                    Watchdog timer x 1
• Counters : Time base counter (14-bit) x 1
• Serial ports : Shift register x 1
Serial port with baud rate generator
(UART/Synchronous) x 1
• A/D converter : 8 bits x 8 channels
• External interrupts : 3
• Interrupt sources : 11
• Package Options
42-pin plastic shrink DIP (SDIP42-P-600-1.78) : (Product name:MSM65522-xxxSS, MSM65P522-xxxSS)
42-pin plastic DIP (DIP42-P-600-2.54) : (Product name:MSM65522-xxxRS, MSM65P522-xxxRS)
44-pin plastic QFP (QFP44-P-910-0.80-2K) : (Product name:MSM65522-xxxGS-2K, MSM65P522-xxxGS-2K)
44-pin plastic QFJ (QFJ44-P-S650-1.27) : (Product name:MSM65522-xxxJS, MSM65P522-xxxJS)