92006HKIM No.0459-1/17

LC72F3781

Overview

The LC72F3781 is a ETR controller with an on-chip one-time PROM for use with the LC723781N, 2N, 3N, 4 and 5

mask versions. Since it has the equivalent electrical performance, pin layout and package as these mask versions, it is

ideally suited for checking program operations, starting the initial shipment of finished products and reducing the

switchover time frame when specifications are changed.

The PROM size is 128 Kbytes (64K

× 16 bits).

Functions

• ROM

: Up to 64K steps (65,535

×16-bits)

The subroutine area holds 4K steps (4,096

×16-bits)

• RAM

: Up to 16K

×4-bits (In banks 00 through FF)

• Stack

: 32levels

• Serial I/O

: Three channels. These circuits can support both 2-wire and 3-wire 8-bit communication

techniques, and can be switched between MSB first and LSB first operation.

One of six internally generated serial transfer clock rates can be selected: 12.5kHz,

37.5kHz, 187.5kHz, 281.25kHz, 375kHz, and 450kHz

• External interrupts

: Seven interrupt inputs (pins INT0 through INT5, and the HOLD pin)

These interrupts can be set to switch between rising and falling edges, although the HOLD

pin only supports falling edge detection.

• Internal interrupts

: Seven interrupts ; four internal timer interrupts, and three serial I/O interrupts.

Ordering number : EN*A0459A

CMOS IC

Electronic tuning radio for car audio

ETR Controller

* This product is licensed from Silicon Storage Technology, Inc. (USA), and manufactured and sold by

SANYO Semiconductor Co., Ltd.

Specifications of any and all SANYO Semiconductor Co.,Ltd. products described or contained herein stipulate

the performance, characteristics, and functions of the described products in the independent state, and are not

guarantees of the performance, characteristics, and functions of the described products as mounted in the

customer

device, the customer should always evaluate and test devices mounted in the customer

equipment.

Any and all SANYO Semiconductor Co.,Ltd. products described or contained herein are, with regard to

"standard application", intended for the use as general electronics equipment (home appliances, AV equipment,

communication device, office equipment, industrial equipment etc.). The products mentioned herein shall not be

intended for use for any "special application" (medical equipment whose purpose is to sustain life, aerospace

instrument, nuclear control device, burning appliances, transportation machine, traffic signal system, safety

equipment etc.) that shall require extremely high level of reliability and can directly threaten human lives in case

of failure or malfunction of the product or may cause harm to human bodies, nor shall they grant any guarantee

thereof. If you should intend to use our products for applications outside the standard applications of our

customer who is considering such use and/or outside the scope of our intended standard applications, please

consult with us prior to the intended use. If there is no consultation or inquiry before the intended use, our

customer shall be solely responsible for the use.