LTC1286CS8 datasheet(20/24 Pages) LINER

20 / 24 page

LTC1286/LTC1298

MICROPROCESSOR INTERFACES

The LTC1286/LTC1298 can interface directly without ex-

ternal hardware to most popular microprocessor (MPU)

synchronous serial formats (see Table 1). If an MPU

without a dedicated serial port is used, then 3 or 4 of the

MPU's parallel port lines can be programmed to form the

serial link to the LTC1286/LTC1298. Included here is one

serial interface example and one example showing a

parallel port programmed to form the serial interface.

Motorola SPI (MC68HC11)

The MC68HC11 has been chosen as an example of an MPU

with a dedicated serial port. This MPU transfers data MSB

-first and in 8-bit increments. The DIN word sent to the data

transfers, the A/D result is read into the MPU. The second

8-bit transfer clocks B11 through B8 of the A/D conversion

result into the processor. The third 8-bit transfer clocks

the remaining bits, B7 through B0, into the MPU. The data

is right justified into two memory locations. ANDing the

second byte with OFHEX clears the four most significant

bits. This operation was not included in the code. It can be

inserted in the data gathering loop or outside the loop

when the data is processed.

MC68HC11 Code

In this example the DIN word configures the input MUX for

a single-ended input to be applied to CHO. The conversion

result is output MSB-first.

TYPICAL APPLICATIONS N

Table 1. Microprocessor with Hardware Serial Interfaces

Compatible with the LTC1286/LTC1298

PART NUMBER

TYPE OF INTERFACE

Motorola

MC6805S2,S3

SPI

MC68HC11

SPI

MC68HC05

SPI

RCA

CDP68HC05

SPI

Hitachi

HD6305

SCI Synchronous

HD63705

SCI Synchronous

HD6301

SCI Synchronous

HD63701

SCI Synchronous

HD6303

SCI Synchronous

HD64180

CSI/O

National Semiconductor

COP400 Family

MICROWIRE

†

COP800 Family

MICROWIRE/PLUS

†

NS8050U

MICROWIRE/PLUS

†

HPC16000 Family

MICROWIRE/PLUS

†

Texas Instruments

TMS7002

Serial Port

TMS7042

Serial Port

TMS70C02

Serial Port

TMS70C42

Serial Port

TMS32011*

Serial Port

TMS32020

Serial Port

Intel

8051

Bit Manipulation on Parallel Port

* Requires external hardware

† MICROWIRE and MICROWIRE/PLUS are trademarks of

National Semiconductor Corp.

LTC1286CS8 датащи(PDF) 20 Page - Linear Technology

LTC1286CS8 датащи(HTML) 20 Page - Linear Technology

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24

датащи скачать

ссылки URL