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What is UPD78085x?

This electronic component, produced by the manufacturer "NEC", performs the same function as "8 Bit Single-Chip Microcontrollers".


UPD78085x Datasheet PDF - NEC

Part Number UPD78085x
Description 8 Bit Single-Chip Microcontrollers
Manufacturers NEC 
Logo NEC Logo 


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DATA SHEET
MOS INTEGRATED CIRCUIT
µPD780851(A), 780852(A)
8-BIT SINGLE-CHIP MICROCONTROLLERS
The µPD780851(A) and 780852(A) are products of the µPD780852 Subseries in the 78K/0 Series.
The µPD780851(A) and 780852(A) include a meter controller/driver, sound generator, LCD controller/driver, 8-bit
resolution A/D converter, timer, serial interface, interrupt function, and various other peripheral hardware.
A flash memory version, the µPD78F0852, which can operate in the same power supply voltage range as the
mask ROM version, and various development tools are also available.
Detailed function descriptions are provided in the following user's manuals. Be sure to read them before
designing.
µPD780852 Subseries User's Manual:
U14581E
78K/0 Series User's Manual - Instruction: U12326E
FEATURES
{ Meter controller/driver: 16 PWM outputs (8-bit resolution)
{ Sound generator: 1 channel
{ Internal ROM and RAM
Part Number
µPD780851(A)
µPD780852(A)
Item
Program Memory
(Internal ROM)
32 KB
40 KB
Internal High-Speed
RAM
1024 bytes
Data Memory
Internal Expansion
RAM
512 bytes
LCD Display RAM
20 × 4 bits
{ Minimum instruction execution time can be changed from high-speed (0.24 µs) to low-speed (3.81 µs)
{ I/O ports: 56 (Including segment signal output alternate function pins)
{ 8-bit resolution A/D converter: 5 channels
{ Serial interface: 3 channels
{ Timer: 6 channels
{ Supply voltage: VDD = 4.0 to 5.5 V
APPLICATIONS
Automobile meter (dashboard) control
The information in this document is subject to change without notice. Before using this document, please
confirm that this is the latest version.
Not all devices/types available in every country. Please check with local NEC representative for
availability and additional information.
Document No. U14577EJ1V0DS00 (1st edition)
Date Published October 2001 NS CP(K)
Printed in Japan
The mark shows major revised points.
2000

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UPD78085x equivalent
µPD780851(A), 780852(A)
OVERVIEW OF FUNCTIONS
Part Number
µPD780851(A)
µPD780852(A)
Item
Internal
memory
ROM
High-speed RAM
Expansion RAM
LCD display RAM
General-purpose registers
Minimum instruction execution time
Instruction set
I/O ports (segment signal output
alternate function pins included)
A/D converter
LCD controller/driver
Serial interface
Timers
Timer outputs
Meter controller/driver
Sound generator
Clock output
Vectored interrupt
sources
Maskable
Non-maskable
Software
Supply voltage
Operating ambient temperature
Package
32 KB
40 KB
1024 bytes
512 bytes
20 × 4 bits
8 bits × 32 registers (8 bits × 8 registers × 4 banks)
On-chip minimum instruction execution time variable function
0.24 µs/0.48 µs/0.95 µs/1.91 µs/3.81 µs (@ 8.38 MHz operation)
16-bit operation
Multiply/divide (8 bits × 8 bits, 16 bits ÷ 8 bits)
Bit manipulation (set, reset, test, Boolean operation)
BCD adjust, etc.
Total:
56
CMOS input:
5
CMOS output:
16
CMOS I/O:
35
8-bit resolution × 5 channels
Power-fail detection function
Segment signal outputs:
Max. 20
Common signal outputs:
Max. 4
Bias:
1/3 bias only
3-wire serial I/O mode:
2 channels
UART mode:
1 channel
16-bit timer:
1 channel
8-bit timer:
1 channel
8-bit timer/event counter:
2 channels
Watch timer:
1 channel
Watchdog timer:
1 channel
2 (capable of 8-bit PWM output: 2)
PWM output (8-bit resolution): 16
Pulse width setting of 8 + 1-bit precision is enabled by a 1-bit addition function
1 channel
65.5 kHz, 131 kHz, 262 kHz, 524 kHz, 1.04 MHz, 2.09 MHz, 4.19 MHz, 8.38 MHz (@
8.38 MHz operation with main system clock)
Internal: 16, External: 3
Internal: 1
1
VDD = SMVDD = 4.0 to 5.5 V
TA = 40 to + 85°C
80-pin plastic QFP (14 × 14 mm)
Data Sheet U14577EJ1V0DS
5


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Part Details

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Information Total 30 Pages
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