MAX3100EPD MAXIM [Maxim Integrated Products], MAX3100EPD Datasheet

no-image

MAX3100EPD

Manufacturer Part Number
MAX3100EPD
Description
SPI/Microwire-Compatible UART in QSOP-16
Manufacturer
MAXIM [Maxim Integrated Products]
Datasheet
The MAX3100 universal asynchronous receiver transmit-
ter (UART) is the first UART specifically optimized for
small microcontroller-based systems. Using an
SPI™/Microwire™ interface for communication with the
host microcontroller (µC), the MAX3100 comes in a com-
pact 16-pin QSOP. The asynchronous I/O is suitable for
use in RS-232, RS-485, IR, and opto-isolated data links.
IR-link communication is easy with the MAX3100’s
infrared data association (IrDA) timing mode.
The MAX3100 includes a crystal oscillator and a baud-
rate generator with software-programmable divider ratios
for all common baud rates from 300 baud to 230k baud.
A software- or hardware-invoked shutdown lowers quies-
cent current to 10µA, while allowing the MAX3100 to
detect receiver activity.
An 8-word-deep first-in/first-out (FIFO) buffer minimizes
processor overhead. This device also includes a flexible
interrupt with four maskable sources, including address
recognition on 9-bit networks. Two hardware-handshak-
ing control lines are included (one input and one output).
The MAX3100 is available in 14-pin plastic DIP and small,
16-pin QSOP packages in the commercial and extended
temperature ranges.
SPI is a trademark of Motorola, Inc. Microwire is a trademark of National Semiconductor Corp.
________________________Applications
19-1259; Rev 0; 7/97
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 408-737-7600 ext. 3468.
Hand-Held Instruments
Intelligent Instrumentation
UART in SPI Systems
Small Networks in HVAC or Building Control
Isolated RS-232/RS-485: Directly Drives Opto-Couplers
Low-Cost IR Data Links for Computers/Peripherals
_______________General Description
__________________________________________________________Pin Configurations
TOP VIEW
SHDN
DOUT
SCLK
GND
________________________________________________________________ Maxim Integrated Products
DIN
IRQ
CS
1
2
3
5
6
4
7
MAX3100
DIP
14
13
12
11
10
8
9
V
TX
RX
RTS
CTS
X1
X2
CC
SPI/Microwire-Compatible
Typical Operating Circuit appears at end of data sheet.
____________________________Features
______________Ordering Information
MAX3100CPD
MAX3100CEE
MAX3100EPD
MAX3100EEE
16-Pin QSOP Package (8-pin SO footprint):
Smallest UART Available
Full-Featured UART:
—IrDA SIR Timing Compatible
—8-Word FIFO Minimizes Processor
—Up to 230k Baud with a 3.6864MHz Crystal
—9-Bit Address-Recognition Interrupt
—Receive Activity Interrupt in Shutdown
SPI/Microwire-Compatible µC Interface
Lowest Power:
—150µA Operating Current at 3.3V
—10µA in Shutdown with Receive Interrupt
+2.7V to +5.5V Supply Voltage in Operating Mode
Schmitt-Trigger Inputs for Opto-Couplers
TX and RTS Outputs Sink 25mA for Opto-Couplers
Overhead at High Data Rates
PART
UART in QSOP-16
SHDN
DOUT
SCLK
GND
N.C.
DIN
IRQ
CS
-40°C to +85°C
-40°C to +85°C
1
2
3
4
5
6
7
8
TEMP. RANGE
0°C to +70°C
0°C to +70°C
MAX3100
QSOP
16
15
14
13
12
11
10
9
14 Plastic DIP
16 QSOP
14 Plastic DIP
16 QSOP
PIN-PACKAGE
V
TX
RX
RTS
N.C.
CTS
X1
X2
CC
1

Related parts for MAX3100EPD

MAX3100EPD Summary of contents

Page 1

... Operating Current at 3.3V —10µA in Shutdown with Receive Interrupt +2.7V to +5.5V Supply Voltage in Operating Mode Schmitt-Trigger Inputs for Opto-Couplers TX and RTS Outputs Sink 25mA for Opto-Couplers ______________Ordering Information PART MAX3100CPD MAX3100CEE MAX3100EPD MAX3100EEE Typical Operating Circuit appears at end of data sheet ...

Page 2

SPI/Microwire-Compatible UART in QSOP-16 ABSOLUTE MAXIMUM RATINGS V to GND ...........................................................................+6V CC Input Voltage to GND (CS, SHDN, X1, CTS, RX, DIN, SCLK) ....-0. Output Voltage to GND (DOUT, RTS, TX, X2) ..............................-0. IRQ...........................................................................-0. ...

Page 3

ELECTRICAL CHARACTERISTICS (continued +2.7V to +5.5V MIN MAX CC PARAMETER SYMBOL AC TIMING (Figure 1) CS Low to DOUT Valid High to DOUT Tri-State SCLK ...

Page 4

SPI/Microwire-Compatible UART in QSOP-16 __________________________________________Typical Operating Characteristics (T = +25°C, unless otherwise noted.) A SUPPLY CURRENT vs. TEMPERATURE 1000 1.8432MHz CRYSTAL 900 TRANSMITTING AT 115.2 kbps 800 700 600 500 400 300 V = 3.3V CC ...

Page 5

Description PIN NAME QSOP DIP 1 1 DIN SPI/Microwire Serial-Data Input. Schmitt-trigger input. SPI/Microwire Serial-Data Output. High impedance when CS is high DOUT 3 3 SCLK SPI/Microwire Serial-Clock Input. Schmitt-trigger input. Active-Low Chip-Select Input. DOUT goes high ...

Page 6

SPI/Microwire-Compatible UART in QSOP-16 (SOURCES RA/FE (MASKS) TRANSMIT-DONE (TM) DATA-RECEIVED (RM) INTERRUPT IRQ LOGIC PARITY (PM) FRAMING ERROR (RAM)/ RECEIVE ACTIVITY Figure 2. Functional Diagram 6 _______________________________________________________________________________________ Pt TX-BUFFER REGISTER TX-SHIFT REGISTER Pt D0t–D7t SHDN DIN B0 ...

Page 7

RX A BAUD BLOCK Figure 3. Start-Bit Timing CS SCLK FEN SHDN DIN DOUT Figure 4. SPI Interface (Write Configuration) The receiver section receives data in serial ...

Page 8

SPI/Microwire-Compatible UART in QSOP-16 MAX3100 Operations Table 1 shows write-configuration data. A 16-bit SPI/Microwire write configuration clears the receive FIFO and the R, T, RA/FE, D0r–D7r, D0t–D7t, Pr, and Pt registers. RTS and CTS remain unchanged. The new configuration is ...

Page 9

Table 5. Bit Descriptions BIT READ/ POR NAME WRITE STATE B0–B3 w 0000 Baud-Rate Divisor Select Bits. Sets the baud clock’s value (Table 6). B0–B3 r 0000 Baud-Rate Divisor Select Bits. Reads the 4-bit baud clock value assigned to these ...

Page 10

SPI/Microwire-Compatible UART in QSOP-16 Table 5. Bit Descriptions (continued) BIT READ/ POR NAME WRITE STATE Receiver-Activity/Framing-Error Bit. In shutdown mode, this is the RA bit. In normal operation, this is the FE bit. In shutdown mode, a transition on RX ...

Page 11

Interrupt Sources and Masks A Read Data operation clears the interrupt IRQ. Table 6 gives the details for each interrupt source. Figure 6 Table 6. Interrupt Sources and Masks—Bit Descriptions BIT MASK MEANING NAME BIT WHEN SET PM Pr Received ...

Page 12

SPI/Microwire-Compatible UART in QSOP-16 Table 7. Baud-Rate Selection Table* BAUD BAUD DIVISION RATE RATIO (f OSC 1.8432MHz 0** 1 115.2k 57. 28.8k 0 ...

Page 13

DOUT 470 SCLK 2k DIN 470 CS MAX253 TRANSFORMER DRIVER Figure 7. Driving Optocouplers ______________________________________________________________________________________ SPI/Microwire-Compatible ISO + 6N136 DIN MAX3100 6N136 SCLK V CC 470 6N136 DOUT 6N136 CS ...

Page 14

SPI/Microwire-Compatible UART in QSOP-16 + SCLK DIN MAX3100 DOUT GND Figure 8. Bidirectional Opto-Isolated Interface Table 8. Component and Supplier List FREQUENCY DESCRIPTION (MHz) Through-Hole Crystal 1.8432 (HC-49/U) Through-Hole 1.8432 Resonator Through-Hole Crystal 3.6864 (HC-49/US) SMT Crystal ...

Page 15

The MAX3100 X1 input can be driven directly by an external CMOS clock source. The trip level is approxi- mately equal connection should be CC made this mode TTL or ...

Page 16

SPI/Microwire-Compatible UART in QSOP-16 DIRECT OPTO-COUPLER DRIVE MAX3221 8051 IRQ 22pF Figure 10. Bidirectional RS-232 IrDA Using an 8051 Interface to PIC Processor (“Quick Brown Fox” Generator) Figure 11 illustrates the use of the MAX3100 with the ® PIC . ...

Page 17

100k Y Delay 100k 1/2 STOP BITS 100k 7/8 BITS 100k B3 100k B2 100k B1 100k B0 100k Figure 11. Quick Brown Fox Generator ______________________________________________________________________________________ SPI/Microwire-Compatible RB7 PIC16C54 RB6 RA0 DOUT MAX3100 RB5 RA1 ...

Page 18

SPI/Microwire-Compatible UART in QSOP-16 __________MAX3100 Synchronous-to-Asynchronous SPI UART at a Glance Table 9. Synchronous Data Input Format (DIN pin from microprocessor, SPI MOSI) Oper- ation Write FEN 1 1 SHDNi Config Read ...

Page 19

Table 11. Bit Definitions* Bit Register Bit Set (1) Name Disable FIFO FEN Config buffer Config SHDNi Shutdown Enable transmit- TM Config done interrupt Enable data- RM Config received inter- rupt Enable parity PM Config interrupt Enable framing- RAM Config ...

Page 20

SPI/Microwire-Compatible UART in QSOP-16 Figure 12a. 8051 IrDA/RS-232 Code 20 ______________________________________________________________________________________ ...

Page 21

Figure 12b. MAX3100 Using PIC µC ______________________________________________________________________________________ SPI/Microwire-Compatible UART in QSOP-16 21 ...

Page 22

SPI/Microwire-Compatible UART in QSOP-16 Figure 12b. MAX3100 Using PIC µC (continued) 22 ______________________________________________________________________________________ ...

Page 23

Operating Circuit SPI/MICROWIRE C ______________________________________________________________________________________ SPI/Microwire-Compatible UART in QSOP-16 MAX3100 DIN TX DOUT RX SCLK CTS CS RTS IRQ C1 C2 MAX3223 RS-232 I/O 23 ...

Page 24

SPI/Microwire-Compatible UART in QSOP-16 ___________________Chip Information TRANSISTOR COUNT: 6848 SUBSTRATE CONNECTED TO GND ________________________________________________________Package Information Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim ...

Related keywords