DESCRIPTION
The µPD7566A is a product of the µPD7554, 7564 sub-series which is a low-end, low-cost version of the µPD7500 series microcomputers. This 4-bit single-chip microcomputer has fewer ports than the other products in the µPD7500 series, in order to reduce the package size, and is especially ideal for temperature control applications, as well as for application systems, such as air conditioners, microwave ovens, refrigerators, rice cooker, washing machines, and cassette deck controllers. Some of the output pins for the microcomputer can be used to directly drive triacs and LEDs

FEATURES
• 45 instructions (subset of the µPD7500H SET B)
• Instruction cycle: 2.86 microseconds (700 kHz, at 5V) with ceramic oscillator
• Program memory (ROM): 1,024 words x 8 bits
• Data memory (RAM): 64 words x 4 bits
• Test sources: 1 external and 1 internal
• 8-bit timer/event counter
• 19 I/O lines (total output current: 100 mA)
. Five pins can be used to directly drive triacs and LEDS
: P80 to P82, P90 to P91
. Eight pins can be used to directly drive LEDs
: P100 to P103, P110 to P113
. Four comparator input pins: P10/Cin 0 to P13/Cin 3
. Mask option functions available on all ports
• Standby functions (STOP/HALT)
• Data memory contents can be retained on a low voltage
• Internal ceramic oscillator for system clock oscillation
• CMOS
• Low-power dissipation
• Single power source (2.7 to 6.0V)

APPLICATIONS
µPD7566A : Air conditioner, microwave oven, refrigerator, audio equipment controller, etc.
µPD7566A(A) : Automotive and transportation equipments, etc.