7481

Features:

Number of basic machine language instructions .................... 71
Minimum instruction execution time ...................................0.5 µs
                                     (at 8 MHz clock input oscillation frequency)
Memory size ROM............................................. 4 K to 16 K bytes
                     RAM ................................................ 128 to 448 bytes
Programmable I/O ports .................................... 18 (7480 group)
   (P0, P1, P4, P5) 24 (7481 group)
Input ports ........................................................... 8 (7480 group)
   (P2, P3) 12 (7481 group)
Built-in programmable pull-up transistors (P0, P1)
Built-in clamp diodes............................................ 2 (7480 group)
   (P4, P5) 8 (7481 group)
Interrupt .................................................. 14 sources, 13 vectors
Timer X, Y...................................................................... 16-bit 5 2
Timer 1, 2 ....................................................................... 8-bit 5 2
Serial I/O .......................... 8-bit x 1 (UART or clock-synchronized)
A-D converter ............................ 8-bit x 4 channels (7480 group)
                                                       8-bit x 8 channels (7481 group)
Built-in watchdog timer
Power source voltage ................................................ 2.7 to 4.5 V
                      (at [2.2 VCC-2] MHz clock input oscillation frequency)
                                                                                       4.5 to 5.5 V
                                       (at 8 MHz clock input oscillation frequency)
Power dissipation .............................................................. 35 mW
                (at 8 MHz clock input oscillation frequency and 5 V power
                                                                                  source voltage)


Application

Automobiles, office automation equipment, home electric appli-ances, etc.


Pinout




Specifications

Symbol	Parameter	Condition	Rated value	Unit
VCC	Power source voltage	All voltages are measured on the basis of the VSS pin. Output transistors are cut off.	0.3 to 7	V
VI	Input voltage		0.3 to VCC + 0.3	V
VO	Output voltage		0.3 to VCC + 0.3	V
Pd	Power dissipation		1000 (Note 1)	mW
Topr	Operating temperature range	Ta = 25°C	20 to 85 (Note 2)	°C
Tstg	Storage temperature		40 to 150 (Note 3)	°C

Description

The 7480/7481 group is the single-chip microcomputer adopting the silicon gate CMOS process. In addition to its simple instruction set, the ROM, RAM, and I/O addresses are placed in the same memory space.
Having built-in serial I/O, A-D converter, and watchdog timer, this single-chip microcomputer is useful for control of automobiles, of- fice automation equipment and home electric appliances.
The 7480/7481 group includes multiple types which differ in the memory type, size, and package.