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Sanyo Electric Components Datasheet

LC5824 Datasheet

4-Bit Single-Chip Microcontrollers Featuring 4 KB to 8 KB of ROM / 1 Kbit of RAM / and an LCD Driver for Medium Speed Small-Scale Control Applications

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Ordering number : EN5944
CMOS IC
LC5824, LC5823, LC5822
4-Bit Single-Chip Microcontrollers Featuring 4 KB to 8 KB of ROM, 1 Kbit of RAM,
and an LCD Driver for Medium Speed Small-Scale Control Applications
Overview
The LC5822, LC5823, and LC5824 are CMOS
microcontrollers that feature the low-voltage operation
required for battery-power applications and that provide
4 KB, 6 KB, or 8 KB of ROM, 1 kilobit of RAM, and an
LCD driver.
These microcontrollers support an instruction set based on
that of the earlier LC5800, LC5812, and LC5814 for
excellent efficiency in software development.
Applications
• LCD display in multi-function watches, timers, and
other products
• Control and LCD display in timers
• Control and LCD display in miniature test equipment,
health maintenance equipment, and other products
• These microcontrollers are optimal for products that
include an LCD display, especially battery powered
products.
Features
• These microcontrollers are high-end versions of the
LC5800 and provide the following features.
Low Current Drain * In halt mode (typical)
• Ceramic oscillator 400 kHz (3.0 V) 200 µA
• Crystal oscillator 32 kHz (1.5 V, Ag specifications)
3.0 µA (LCD biases other than 1/3) 4.5 µA (LCD drive:
1/3 bias)
• Crystal oscillator 32 kHz (3.0 V, Li specifications)
2.0 µA (LCD biases other than 1/3) 6.0 µA (LCD drive:
1/3 bias)
Timer and Counter Functions
• One 8-bit programmable timer (May be used as an event
counter)
• One 8-bit programmable reload timer
• Time base timer (for clocks)
• Watchdog timer
• 8-bit serial I/O (3-pin synchronous system)
Wide Allowable Operating Ranges
Power
options
supply
EXT-V
EXT-V
EXT-V
EXT-V
Li
Ag
Cycle
times
Supply
voltage
range
Notes
When an 800-kHz ceramic
10 µs VDD = 2.3 to 3.6 V oscillator is used
When an 400-kHz ceramic
20 µs VDD = 2.3 to 3.6 V oscillator is used
When an 65-kHz crystal oscillator
61 µs VDD = 2.3 to 3.6 V is used
When an 32-kHz crystal oscillator
122 µs VDD = 2.0 to 3.6 V is used
When an 32-kHz crystal oscillator
122 µs VDD = 2.6 to 3.6 V* is used
When an 32-kHz crystal oscillator
122 µs VDD = 1.3 to 1.65 V is used
Note*: When the backup flag is set, the BAK pin is connected to VDD.
Standby Functions
• Clock standby function (halt mode)
Only the oscillator circuits, the divider circuit, and the
LCD driver operate. All other internal operations are
stopped. This provides a power-saving function in which
current drain is minimized, and allows a clock function
to be implemented easily with low power dissipation.
Furthermore, low-speed and high-speed modes can be
implemented by setting the operating modes of the two
oscillator circuits.
• Full standby function (hold mode)
• Halt mode can be cleared by any of two external and
two internal interrupts.
Any and all SANYO products described or contained herein do not have specifications that can handle
applications that require extremely high levels of reliability, such as life-support systems, aircraft’s
control systems, or other applications whose failure can be reasonably expected to result in serious
physical and/or material damage. Consult with your SANYO representative nearest you before using
any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other
parameters) listed in products specifications of any and all SANYO products described or contained
herein.
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
82198RM (OT) No. 5944-1/24


Sanyo Electric Components Datasheet

LC5824 Datasheet

4-Bit Single-Chip Microcontrollers Featuring 4 KB to 8 KB of ROM / 1 Kbit of RAM / and an LCD Driver for Medium Speed Small-Scale Control Applications

No Preview Available !

LC5824, LC5823, LC5822
Improved I/O Functions
• External interrupt pins
• Input pins that can clear halt mode:
10 pins (maximum)
• Input ports with input resistors that can be controlled
from software: 8 pins (maximum)
• Pins with a function that prevents the input port floating
state:
8 pins (maximum)
• LCD drive pins: 4 pins (common), 42 pins (segment outputs)
• General-purpose I/O ports:
16 pins (when all 4 P port pins are used)
• General-purpose inputs: 8 pins
• General-purpose outputs (1): 1 pin (the ALM pin)
• General-purpose outputs (2): 42 pins (when all 42 of the
LCD segment outputs are
switched over to function as
general-purpose outputs)
• 8-bit serial output port: 1 set (3 pins: output, input,
and clock)
Functional Overview
• Program ROM: 4096 × 16 bits LC5824
3072 × 16 bits LC5823
2048 × 16 bits LC5822
• Internal RAM: 256 × 4 bits
• All instructions execute in a single cycle.
• Extensive set of interrupt functions for clearing halt and
hold mode
— 8 halt mode clearing functions
— 5 hold mode clearing functions
— 6 interrupt functions
— Subroutines can be nested up to 8 levels (Special-
purpose registers that are shared with the interrupt
function are built in.)
• Powerful hardware to increase system processing capacity
— Segment port related hardware
Built-in segment PLA circuit
Built-in segment decoder
Support for six different LCD drive specifications
Outputs can be switched to CMOS levels
— Built-in 8-bit synchronous serial I/O circuit
— 8-bit read/write timer (plus a separate 8-bit
prescaler; can be used as and event counter)
— 8-bit reload timer (plus built-in 8-bit prescaler)
— Built-in 8-bit prescaler (for use with timer 1, timer 2,
and the serial counter)
— All of RAM can be used a working area (RAM bank
system)
— Dedicated data pointer register for RAM access
— 15-stage divider circuit for clocks (also used as the
LCD voltage alternation frequency generator)
— 8-bit table reference function (reads 8-bit ROM data)
— Chattering prevention circuit (on two ports)
— Alarm signal generation circuit
• LCD panel drive output pins with high flexibility
(42 pins)
Drive system
bias · duty
bias · duty
bias · duty
bias · duty
bias · duty
Static drive
Number of driven segments Required number of common pins
168 segments
4 pins
126 segments
3 pins
168 segments
4 pins
126 segments
3 pins
84 segments
2 pins
42 segments
1 pin
— The LCD output pins can be switched to function as
general-purpose outputs.
CMOS/p-channel/n-channel type combinations: Up
to 42 pins
— An alternation frequency appropriate for the LCD
panel used can be selected.
• An oscillator appropriate for your system’s specifications
can be selected.
— A 32- or 65-kHz crystal oscillator can be selected
(Used when a clock function is required or for low
current drain operation.)
— A ceramic oscillator with a frequency from 400 kHz
to 2 MHz can be selected (when high-speed
operation is required.)
Available delivery formats: QIP-80 and chip
Package Dimensions
unit: mm
3174-QFP80E
[LC5824, 5823, 5822]
SANYO: QIP80E
No. 5944-2/24


Part Number LC5824
Description 4-Bit Single-Chip Microcontrollers Featuring 4 KB to 8 KB of ROM / 1 Kbit of RAM / and an LCD Driver for Medium Speed Small-Scale Control Applications
Maker Sanyo
Total Page 24 Pages
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