General Description
The AMIC A83516 is a high-performance 8-bit microcontroller. It is compatible with the industry standard 80C52 microcontroller series. The A83516 contains a 256B RAM, 64KB X 8 ROM, four 8-bit bidirectional parallel ports, three 16-bit timer/counters, a serial port and six interrupt sources with two priority levels.
The A83516 has two power reduction modes, idle mode and power-down mode. It supports 64KB external data memory.

FEATUREs
  8-bit CMOS microcontroller
  Fully static design with power saving idle mode and power down mode
  Low standby current at full supply voltage
  Versions for 12/24/40MHZ operating frequency
  On chip 256B RAM
  On chip 64KB X 8 MASK-ROM program memory
  64K bytes external data memory space
  Four 8-bit bidirectional ports
  Three 16-bit Timers/Counters (Timer 2 with up/down counter feature)
  One full duplex serial port
  Boolean processor
  Six interrupt sources, two priority levels
  Available in 40-pin P-DIP and 44-pin PLCC packages