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Sanyo Electric Components Datasheet

LC5852N Datasheet

Four-Bit Single-Chip Microcontroller

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Ordering number : EN 4365B
CMOS LSI
LC5852N
Four-Bit Single-Chip Microcontroller with
On-Chip LCD Drivers for Small-Scale Control in
Medium-Speed Applications
Overview
The LC5852N is a high-performance four-bit single-chip
built-in LCD driver microprocessor that provides a variety
of attractive features including low-voltage operation and
low power dissipation. The LC5852N was developed as an
upwardly compatible version of the LC5851N and
provides a ROM capacity increased from 1024 to 2048 15-
bit words and a RAM capacity increased from 64 × 4 bits
to 128 × 4 bits.
Applications
• System control and LCD display in cameras, radios and
similar products
• System control and LCD display in miniature electronic
test equipment and consumer health maintenance
products
• The LC5852N is optimal for end products with LCD
displays and, in particular, for battery operated products.
Features
The LC5852N is an upwardly compatible version of the
LC5851N and, as such, has the following features.
• Extremely broad allowable operating ranges
Package Dimensions
unit: mm
3057-QIP64A
[LC5852N]
SANYO: QIP64A
Power supply option
Cycle time
Power supply voltage range
Note
EXT-V
EXT-V
EXT-V
EXT-V
Li
Ag
10 µs
20 µs
61 µs
122 µs, 244 µs
122 µs, 244 µs
122 µs, 244 µs
VSS2 = –4.0 to –5.5 V
VSS2 = –4.0 to –5.5 V
VSS2 = –2.3 to –5.5 V
VSS2 = –2.0 to –5.5 V
VSS2 = –2.6 to –3.6 V*
VSS1 = –1.3 to –1.65 V
When using an 800 kHz ceramic resonator
When using a 400 kHz ceramic resonator
When using a 65 kHz crystal oscillator
When using a 32 kHz crystal oscillator
When using a 32 kHz crystal oscillator
When using a 32 kHz crystal oscillator
Note: * When the backup flag is set, the BAK pin is shorted to VSS2. (See the user’s manual for details.)
• Low current drain
— Ceramic oscillator (CF):
— Crystal oscillator (Xtal):
— Crystal oscillator (Xtal):
400 kHz (5.0 V)
32 kHz (1.5 V, Ag specifications)
32 kHz (3.0 V, Li specifications)
HALT mode (typical)
150 µA
2.0 µA (for LCD biases other than 1/3)
3.5 µA (for an LCD bias of 1/3)
1.0 µA (for LCD biases other than 1/3)
5.0 µA (for an LCD bias of 1/3)
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
O3095HA (OT)/91994TH (OT) No. 4365-1/29


Sanyo Electric Components Datasheet

LC5852N Datasheet

Four-Bit Single-Chip Microcontroller

No Preview Available !

LC5852N
• Timer functions
— One six-bit programmable timer
— Time base timer (for clock applications)
• Standby functions
— Clock standby function (HALT mode)
The LC5852N provides a halt function that reduces
power dissipation. In halt mode, only the oscillator,
divider and LCD driver circuits operate. All other
internal operations are stopped. This mode allows
the LC5852N to easily implement a low-power
clock function.
— Full standby function (HOLD mode)
— HALT mode is cleared by two external factors and
two internal factors.
• Improved I/O functions
— External interrupt pins
— Input pins that can clear HALT mode (up to 9 pins)
— Input ports with software controllable input resistors:
up to 8 pins
— Input ports with built-in floating prevention circuits:
up to 8 pins
— LCD drivers; common:
4 pins,
segment pins:
25 pins
— General-purpose I/O ports:
8 pins
— General-purpose inputs:
9 pins
— General-purpose outputs (1):
6 pins
(ALM pin, LIGHT pin)
— General-purpose outputs (2):
25 pins
(when all 25 LCD segment ports are used as general-
purpose outputs)
— Pseudo-serial output port:
1 set
(Three pins: output, BUSY, clock)
Function Overview
• Program ROM: 2048 × 15 bits
• On-chip RAM: 128 × 4 bits
• All instructions execute in a single cycle
• HALT mode clear and interrupt functions
(External factors)
Changes in the S and M port input signals
Changes in the INT pin input signal
(Internal factors)
Overflow from the clock divider circuit
Timer underflow
• Subroutines can be nested up to four levels (including
interrupts)
• Powerful hardware to improve processing capabilities
— On-chip segment PLA circuit and segment decoder:
The LCD driver outputs can handle LCD panel
segment display without incurring software
overhead.
— All LCD driver output pins can be switched to be
used as output ports.
— One six-bit programmable timer
— Part of the RAM area can be used as a working area.
— Built-in clock oscillator and 15-stage divider (also
used for LCD alternation signal generation)
• Highly flexible LCD panel drive output pins (25)
Supported
Maximum number Required
drive types
of segments
common pins
1/3 bias—1/4 duty......100 segments ..........4 pins
1/3 bias—1/3 duty......75 segments ............3 pins
1/2 bias—1/4 duty......100 segments ..........4 pins
1/2 bias—1/3 duty......75 segments ............3 pins
1/2 bias—1/2 duty......50 segments ............2 pins
Static ..........................25 segments ............1 pin
— The LCD output pins can be converted to use as
general-purpose output pins.
CMOS type:
25 pins (maximum)
p-channel open drain type: 3 pins (maximum)
• An oscillator appropriate for the system specifications
can be selected.
32 or 65 kHz crystal oscillator, or
400 or 800 kHz ceramic oscillator
Delivery formats
QIP-64A or chip product
No. 4365-2/29


Part Number LC5852N
Description Four-Bit Single-Chip Microcontroller
Maker Sanyo
Total Page 29 Pages
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