UPD75108

Features:

* Internal memory
   * Program memory (ROM)
      : 8068 * 8 bits (UPD75108)
      : 6016 * 8 bits (UPD75106)
      : 4096 * 8 bits (UPD75104)
   * Data memory (RAM)
      : 512 * 4 bits (UPD75108)
      : 320 * 4 bits (UPD75106, 75104)
* New architecture "75X series" rivaling 8-bit microcomputers
* 43 systematically organized instructions
   * A wealth of bit manipulation instructions
   * 8-bit data transfer, compare, operation, increment, and decrement instructions
   * 1-byte relative branch instructions
   * GETI instruction executing 2-/3-byte instruction with one byte
* High speed. Minimum instruction execution time: 0.95 s (at 4.19 MHz), 5 V
* Power-saving, instruction time change function: 0.95 s/1.91 s/15.3 s (at 4.19 MHz)
* I/O port pins as many as 58
* Three channels of 8-bit timers
* 8-bit serial interface
* Multiplexed vector interrupt function
* Model with PROM is available: UPD75P108B (One-time PROM, EPROM)


Pinout




Description

UPD75108 is a 4-bit single-chip microcomputer integrating timer/event counters, serial interface, and vector interrupt function, in addition to a CPU, ROM, RAM, and I/O ports, on a single chip.  Operating at high speeds,the microcomputer allows data to be manipulated in units of 1, 4, or 8 bits.  In addition, various bit manipulation instructions are provided to reinforce I/O manipulation capability.  Equipped with I/Os for interfacing with peripheral circuits operating on a different supply voltage, outputs that can directly drive LEDs, and analog inputs, UPD75108 is suitable for controlling such systems as VTRs, acoustic products, button telephones, radio communications equipment, and printers.  A pin-compatible EPROM model of UPD75108 is also available for evaluation of system development and small-scale production of application systems.
Detailed functions of UPD75108 are described in the following user's manual.  Be sure to read it for designing.UPD751XX Series User's Manual: IEM-922