DESCRIPTION
The µPD78C11A(A) is a CMOS 8-bit microcomputer that features single-chip integration of a 16-bit ALU, ROM, RAM, an A/D converter, a multifunctional timer/event counter, and a universal serial interface, as well as up to 60 Kbytes of expandable external memory (ROM/RAM). The µPD78C10A(A) is the ROMless version of the µPD78C11A(A) which can directly address up to 64 Kbytes of external memory. The µPD78C12A(A) is a version of the µPD78C11A(A) that has greater on-chip ROM capacity and is expandable to up to 56 Kbytes of external memory (ROM/RAM). The µPD78C10A(A), µPD78C11A(A), and µPD78C12A(A) all use CMOS technology to enable low-power operation and they also feature standby functions to enable data retention and other operations using very low power consumption.
In addition, the µPD78CP14(A) and 78CP18(A) are available as on-chip PROM versions appropriate for evaluating and prototyping during system development as well as for early development of application sets and low-volume production.

FEATURES
• Higher reliability than µPD78C10A, 78C11A, or 78C12A
• 159 instructions: the 87AD Series instruction set with multiply and divide instructions and 16-bit arithmetic instructions
• 0.8 µs instruction cycle time (15-MHz operation)
• On-chip ROM: 4096-W x 8 (µPD78C11A(A)), 8192-W x 8 (µPD78C12A(A)), or none (µPD78C10A(A))
• On-chip RAM: 256-W x 8
• High-precision 8-bit A/D converter: 8 analog inputs
• Universal serial interface: asynchronous, synchronous, and I/O interface modes
• Multifunctional 16-bit timer/event counter
• Two 8-bit timers
• I/O lines: 32 in µPD78C10A(A) and 44 in µPD78C11A(A) or 78C12A(A)
• Interrupt functions (3 external, 8 internal): 1 nonmaskable interrupt and 10 maskable interrupts
• Standby functions: HALT mode and hardware/software STOP mode
• Zero-cross detection function: 2 inputs
• On-chip mask optional pull-up resistors are available (for ports A, B, and C on µPD78C11A(A) or 78C12A(A) only)