75108A

` Internal memory
    • Program memory (ROM)
       : 8064 ´ 8 bits (mPD75108A)
       : 4096 ´ 8 bits (mPD75104A)
    • Data memory (RAM)
       : 512 ´ 4 bits (mPD75108A)
       : 320 ´ 4 bits (mPD75104A)
` Architecture "75X" 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 ms (at 4.19 MHz, 5V)
` Instruction execution time change function: 0.95 ms/1.91 ms/15.3 ms (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

PD75108A is a 4-bit single-chip CMOS microcomputer having a data processing capability comparable to that of an 8-bit microcomputer. 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, PD75108A is suitable for controlling such small equipments as cameras and VCR_s.