M34570M4-XXXFP

·Minimum instruction execution time
   When f(X_IN) is selected for system clock ....................... 1.5ms
   (f(X_IN)=2.0 MHz, V_DD=4.5 V to 5.5 V)
   When f(X_IN)/4 is selected for system lock .................... 2.86ms
   (f(X_IN)=4.2 MHz,V_DD=2.0 V to 5.5 V)
·Supply voltage
            ............................ 2.5 V to 5.5 V (One Time PROM version)
.             .................................... 2.0 V to 5.5 V (Mask ROM version
· System clock switch function.................. f(X_IN)/4 or not divided
· Timers
    Timer 1... 10-bit timer with a reload register and carrier wave output auto-control function
    Timer 2 ................................ 8-bit timer with a reload register
    Timer 3... 8-bit timer with two reload registers and carrier wave generation function
· Interrupt ....................................................................4 sources
· Power-on reset circuit
· Watchdog timer ............................................................ .16 bits
· Key-on wakeup function (Ports P0, P1, and P4, ON/OFF of port P4 can be switched)
· Pull-up transistor (Ports P0, P1, and P4, ON/OFF of port P4 can be switched)
· Voltage drop detection circuit
· Clock generating circuit (ceramic resonance)

The 4570 Group is a 4-bit single-chip microcomputer designed with CMOS technology. Its CPU is that of the 4500 series using a simple, high-speed instruction set. The computer of 4570 is equipped with a carrier wave output circuit for remote control, an 8-bit timer with a reload register, a 10-bit timer with a reload register, and an 8-bit timer with two reload registers.

The various microcomputers in the 4570 Group include variations of the built-in memory size. The mask ROM version and One Time PROM version of 4570 Group are produced as shown in the table below.