MAX3111ECWI Ver la hoja de datos (PDF) - Maxim Integrated

Número de pieza

componentes Descripción

fabricante

MAX3111ECWI

SPI/MICROWIRE-Compatible UART and ±15kV ESD Protected RS-232 Transceivers with Internal Capacitors

Maxim Integrated 

SPI/MICROWIRE-Compatible UART and ±15kV ESD-

Protected RS-232 Transceivers with Internal Capacitors

T2IN

T1IN

R2OUT

T2OUT

T1OUT

R2IN

R1OUT

C1+

C1-

C2+

C2-

VCC

INTERNAL

INTERNAL

Pr

RX BUFFER

9

CHARGE

PUMP

INTERNAL

5k

5k

INTERNAL

MAX3110E/MAX3111E

R1IN

V+

GND

V-

SHDN

9

9

Pr RX FIFO

9

RX

Pr RX SHIFT REGISTER

X2

BAUD-RATE

X1

GENERATOR

4

TX

Pt TX SHIFT REGISTER

9

Pt

TX BUFFER

9

CTS

RTS

I/O

Figure 1. MAX3110E/MAX3111E Functional Diagram

Detailed Description

The MAX3110E/MAX3111E contain an SPI/QSPI/MICROWIRE-

compatible UART and an RS-232 transceiver with two

drivers and two receivers. The UART is compatible with

SPI and QSPI for CPOL = 0 and CPHA = 0. The UART

supports data rates up to 230kbaud for standard UART

bit streams as well as IrDA and includes an 8-word

receive FIFO. Also included is a 9-bit-address recogni-

tion interrupt.

The RS-232 transceiver has electrostatic discharge

(ESD) protection on the transmitter outputs and the

receiver inputs. The internal charge-pump capacitors

minimize the number of external components required.

The RS-232 transceivers meet EIA/TIA-232 specifica-

INTERRUPT

LOGIC

9

SPI

INTERFACE

IRQ

DOUT

SCLK

CS

DIN

tions for VCC down to the minimum supply voltage and

are guaranteed to operate for data rates up to 250kbps.

The UART and RS-232 functions operate as one device

or independently since the two functions share only

supply and ground connections.

UART

The universal asynchronous receiver transmitter

(UART) interfaces the SPI/QSPI/MICROWIRE-compati-

ble synchronous serial data from a microprocessor (µP)

to asynchronous, serial-data communication ports (RS-

232, IrDA). Figure 1 shows the MAX3110E/MAX3111E

functional diagram. Included in the UART function is an

SPI/QSPI/MICROWIRE interface, a baud-rate generator,

and an interrupt generator.

10 ______________________________________________________________________________________

Share Link: