MOS INTEGRATED CIRCUIT
8-BIT SINGLE-CHIP MICROCONTROLLER (WITH A/D CONVERTER)
The µPD78C14(A) is a single-chip, CMOS 8-bit microcontroller in which a 16-bit ALU, a ROM, a RAM, an A/D converter,
a multifunction timer/event counter, and a serial interface are all integrated. Moreover, a 48-Kbyte external expansion
memory (ROM/RAM) can be connected.
Since the µPD78C14(A) uses the CMOS construction, its operations are performed with low power consumption. By
using the standby function, functions such as data retention are performed with lower power consumption.
For details on functions, refer to the User’s Manual listed below. Please read it before starting design work.
87AD series µPD78C18 User’s Manual: IEU-1314
High reliability as compared with µPD78C14
159 instructions: 87AD instruction set
Multiply and divide instructions, 16-bit arithmetic operation instructions
Instruction cycle: 0.8 µs at 15 MHz
Internal ROM: 16384 W x 8
Internal RAM: 256 W x 8
Direct addressing to an external memory (ROM/RAM) up to 64 Kbytes
Highly accurate 8-bit A/D converter: Eight analog inputs
General-purpose serial interface: Asynchronous, synchronous, and I/O interface modes
Multifunction 16-bit timer/event counter
Two 8-bit timers
I/O lines: 44
Interrupt functions: Three external, eight internal
• Non-maskable interrupt: 1
• Maskable interrupts: 10
Zero-cross detection function (two inputs)
Standby functions: HALT mode, Hardware/software STOP mode
64-pin plastic QUIP
64-pin plastic QFP (14 x 20 mm)
68-pin plastic QFJ (950 x 950 mil)
Remark xxx is a ROM code suffix.
Please refer to “Quality grade on NEC Semiconductor Devices” (Document number IEI-1209) published by
NEC Corporation to know the specification of quality grade on the devices and its recommended applications.
Document No. IC-2813B
(O.D. No. IC-8242B)
Date Published May 1995 P
Printed in Japan
The information in this document is subject to change without notice.
*H The mark shows revised points.