MAX3100CEE Maxim Integrated Products, MAX3100CEE Datasheet - Page 16

IC UART SPI/MICRWIRE COMP 16QSOP

MAX3100CEE

Manufacturer Part Number
MAX3100CEE
Description
IC UART SPI/MICRWIRE COMP 16QSOP
Manufacturer
Maxim Integrated Products
Datasheet

Specifications of MAX3100CEE

Features
Low Power
Number Of Channels
1, UART
Fifo's
8 Byte
Protocol
RS232, RS485
Voltage - Supply
2.7 V ~ 5.5 V
With Irda Encoder/decoder
Yes
With False Start Bit Detection
Yes
With Cmos
Yes
Mounting Type
Surface Mount
Package / Case
16-SSOP (0.150", 3.90mm Width)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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Figure 11 illustrates the use of the MAX3100 with the
PIC
repeatedly transmits “THE QUICK BROWN FOX JUMPS
OVER THE LAZY DOG” (covering the entire alphabet)
over an RS-232 link with adjustable baud rate, word
length, and delay. Although a software-based UART
could be implemented on the PIC, features like accu-
rate variable baud rates, high baud rates, and simple
protocol selection would be difficult to implement reli-
ably. The 16C54 in the example is the most basic of the
PICs. Thus, it is possible to implement the example on
any member of the PIC family.
SPI/MICROWIRE-Compatible
UART in QSOP-16
Figure 10. Bidirectional RS-232 IrDA Using an 8051
PIC is a registered trademark of Microchip Corporation.
16
®
______________________________________________________________________________________
. This circuit is a “Quick Brown Fox” generator that
MAX3221
(“Quick Brown Fox” Generator)
8051
Interface to PIC Processor
OPTO-COUPLER
DIRECT
22pF
DRIVE
IRQ
MAX3100
1.8432MHz
RX
TX
22pF
0.1μF
+5V
+5V
100Ω
The software routine (Figure 12) begins by reading the
DIP switch on port RB. The switch data includes 4 bits
for the baud rate, 1 bit for number of stop bits, 1 bit for
a word length of 7 or 8 bits, and 1 bit for delay between
messages. The PIC reads the switch only at initializa-
tion (reset), and programs the parameters into the
MAX3100. It then begins sending the message repeat-
edly. If the delay bit is set, it inserts a 1sec delay
between transmissions. As in the 8051 example, the
main routine is called UTLK, and can be used in any
PIC-based, port-pin-interfaced application.
330Ω
10kΩ
IR LED
OR
3100
RX
TX
1/6 HC00
1/6 HC00
IR MODULE
DRIVE
TXD
RXD
MODULE
IR

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