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D78C14G 데이터시트, 핀배열, 회로
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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD78C14(A)
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
FEATURES
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
ORDERING INFORMATION
Part number
µPD78C14G(A)-xxx-36
µPD78C14GF(A)-xxx-3BE
µPD78C14L(A)-xxx
Package
64-pin plastic QUIP
64-pin plastic QFP (14 x 20 mm)
68-pin plastic QFJ (950 x 950 mil)
Quality grade
Special
Special
Special
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.
©© 11999914




D78C14G pdf, 반도체, 판매, 대치품
X1
X2
PC0/TxD
PC1/RxD
PC2/SCK
OSC
SERIAL I/O
8
NMI
INT1
INT.
CONTROL
4
8
PC3/INT2/TI
PC4/TO
PC5/CI
PC6/CO0
PC7/CO1
TIMER
8
TIMER
EVENT
COUNTER
8
AN7-0
VAREF
VDD
AVSS
8
A/D 8
CONVERTER
16
LATCH
INC/DEC
PC
SP
EA
VA
BC
DE
HL
EA'
V' A'
B' C'
D' E'
H' L'
BUFFER
8/16
14
MAIN
G.R
PROGRAM
MEMORY
ALT (16 K-BYTE)
G.R
8
8
Note
DATA
MEMORY
(256-BYTE)
8
8
8
8
16
8
8
8
16
INTERNAL DATA BUS
16 6
LATCH LATCH
PSW
16 16
ALU
(8/16)
8
8
INST.REG
INST.
DECODER
8
8
16
READ/WRITE
CONTROL
SYSTEM
CONTROL
STANDBY
CONTROL
RD WR ALE MODE1 MODE0 RESET STOP VDD VSS
Note DATA MEMORY can only be used when RAE bit of MM register is set to 1.
External memory is necessary when 0 is set.
8 PF7-0/AB15-8
8 PD7-0/AD7-0
8 PC7-0
8 PB7-0
8 PA7-0

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D78C14G 전자부품, 판매, 대치품
www.DataSheet4U.com
µPD78C14(A)
2. PIN FUNCTIONS
2.1 Pin Function List
Pin
PA7-PA0
(Port A)
PB7-PB0
(Port B)
PC0/TxD
PC1/RxD
PC2/SCK
PC3/INT2/TI
PC4/TO
PC5/CI
PC6/CO0
PC7/CO1
PD7-PD0/
AD7-AD0
PF7-PF0/
AB15-AB8
WR
(Write
Strobe)
Input/Output
Input/Output
Input/Output
Input/Output,
Output
Input/Output,
Input
Input/Output,
Input/Output
Input/Output,
Input, Input
Input/Output,
Output
Input/Output,
Input
Input/Output,
Output
Input/Output,
Input/Output
Input/Output,
Output
Output
Function
These 8 pins constitute an 8-bit I/O port and input/output can be specified in bit
units.
These 8 pins constitute an 8-bit I/O port and input/output can be specified in bit
units.
Port C
Transmit Data
These 8 pins constitute an 8-bit I/O This pin outputs serial data.
port and input/output can be specified Receive Data
in bit units.
This pin inputs serial data.
Serial Clock
This pin inputs/outputs serial clock. It be-
comes an output pin when an internal
clock is used or an input pin when an
external clock is used.
Interrupt Request/Timer Input
This pin inputs edge triggering (falling
edge) maskable interrupt or external
clock for timer. This pin is also shared
with zero-cross detection pin for AC input.
Timer Output
This pin outputs square waves in which
one cycle of the internal clock forms a
half cycle, indicating the timer’s counting
time.
Counter Input
This pin inputs external pulse for timer/
event counter.
Counter Output 0,1
This pin outputs programmable square
wave by timer/event counter.
Port D
Address/Data Bus
These 8 pins constitute an 8-bit I/O These pins function as multiplexed
port and input/output can be
address/data bus when using an
specified in byte units.
external memory.
Port F
Address Bus
These 8 pins constitute an 8-bit I/O These pins function as address bus when
port and input/output can be specified using an external memory.
in bit units.
This is a strobe signal output to write data in external memory. This signal
becomes high level except during the data write machine cycle for external memory.
This signal becomes output high impedance when the RESET signal is low or in
the hardware STOP mode.
7

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