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PDF MAX14830 Data sheet ( Hoja de datos )
| Número de pieza | MAX14830 | |
| Descripción | Quad Serial UART | |
| Fabricantes | Maxim Integrated | |
| Logotipo |  |
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MAX14830
EVALUATION KIT AVAILABLE
Quad Serial UART with 128-Word FIFOs
General Description
The MAX14830 is an advanced quad universal asynchro-
nous receiver-transmitter (UART), each UART having
128 words of receive and transmit first-in/first-out (FIFO)
and a high-speed serial peripheral interface (SPI) or I2C
controller interface. A PLL and fractional baud-rate
generators allow a high degree of flexibility in baud-rate
programming and reference clock selection.
Each of the four UARTs is selected by in-band SPI/I2C
addressing. Logic-level translation on the transceiver and
controller interfaces allows ease of interfacing to micro-
controllers, FPGAs, and transceivers that are powered by
differing supply voltages.
Extensive features simplify transceiver control in
half-duplex communication applications. The MAX14830
features the ability to synchronize the start of individual
UART’s transmission by SPI-based triggering. On-board
timers allow programming of delays between transmitters
as well as clock generation on GPIOs.
The 128-word FIFOs have advanced FIFO control
reducing host processor data flow management.
The MAX14830 is available in a 48-pin TQFN (7mm
x 7mm) package and is specified to operate. over the
extended -40°C to +85°C temperature range.
Applications
●● Industrial Control Systems
●● Programmable Logic Controllers (PLC)
●● IO-Link Master Controllers
●● Medical Systems
●● Point-of-Sales Systems
●● Airplane Communication Buses
Typical Operating Circuit and Ordering Information appear
at end of data sheet.
Benefits and Features
●● Bridges an SPI/MICROWIRE or I2C Microprocessor
Bus to an Asynchronous Interface like RS-485,
RS-232, or IrDASM
• SIR- and MIR-Compliant IrDA Encoder/Decoder
• Line Noise Indication Ensures Data Link Integrity
●● Deep, 128-Word Buffer and Automated Control
Features Help Offload Activity on the Microcontroller
• 128-Word Transmit and Receive FIFOs per UART
• Transmitter Synchronization Through SPI Commands
• Automatic Hardware Flow Control Using RTS_ and
CTS_ Outputs and Inputs
• Automatic Software Flow Control (XON/XOFF)
• Auto Transceiver Direction Control
• Programmable Setup and Hold Times for Transceiver
Control
• Auto Transmitter Disable
• Half-Duplex Echo Suppression
• 9-Bit Multidrop-Mode Data Filtering
Special Character Detection
GPIO-Based Character Detection
Four Timers Routed to GPIOs
16 Flexible GPIOs with 20mA Drive Capability
●● Saves Board Space
• TQFN (7mm x 7mm) Package
●● Fast Data Rates Allow Maximum System Flexibility
Across Interface Standards
• 6Mbaud (max) Data Rate in 16x Sampling Mode
• 12/24Mbaud (max) Data Rate in 2x/4x Rate Modes
• High-Resolution Programmable Baud-Rate
• SPI Up to 26MHz Clock Rate
• Fast Mode Plus (Pm+) I2C Up to 1MHz
●● Integrated Internal Oscillator Eliminates the Need for
an External Oscillator and Reduces the BOM Cost
• Fractional Baud-Rate Generators, Predivider, and
Phase-Locked Loop (PLL)
• Logic-Level Translation Down to 1.61V on the Con-
troller and Transceiver Interfaces Ensures System
Compatibility
• Register Compatible with MAX3107, MAX3108,
MAX3109
IrDA is a registered service mark of Infrared Data Association
Corporation.
19-5547; Rev 7; 2/16
1 page  
MAX14830
Quad Serial UART with 128-Word FIFOs
LIST OF TABLES
Table 1. UART GPIO Assignments for GPIO Interrupts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 2. StopBits Truth Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 3. Length_ Truth Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Table 4. SwFlow_ Truth Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 5. UART GPIO Assignments for GPIO Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Table 6. UART GPIO Assignments for GPIO Input/Output Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Table 7. PLLFactor_ Selector Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Table 8. GloblComnd Command Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 9. Extended Mode Addressing (SPI only) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 10. SPI Command Byte Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 11. SPI U1, U0 UART Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 12. I2C Address Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
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Maxim Integrated │ 5
5 Page 
MAX14830
Quad Serial UART with 128-Word FIFOs
AC Electrical Characteristics (continued)
(VA = +2.35V to +3.6V, VL = +1.71V to +3.6V, VEXT = +1.71V to +3.6V, TA = -40°C to +85°C, unless otherwise noted. Typical values
are at VA = +2.8V, VL = +1.8V, VEXT = +2.5V, TA = +25°C.) (Notes 2, 3)
PARAMETER
SYMBOL
I2C BUS: TIMING CHARACTERISTICS (SEE FIGURE 1)
CONDITIONS
Standard mode
SCL Clock Frequency
fSCL
Fast mode
Fast mode plus
Bus Free Time Between a STOP
and START Condition
tBUF
Standard mode
Fast mode
Fast mode plus
Hold Time for START Condition
and Repeated START Condition
tHD:STA
Standard mode
Fast mode
Fast mode plus
Standard mode
Low Period of the SCL Clock
tLOW
Fast mode
Fast mode plus
Standard mode
High Period of the SCL Clock
tHIGH
Fast mode
Fast mode plus
Standard mode
Data Hold Time
tHD:DAT Fast mode
Fast mode plus
Standard mode
Data Setup Time
tSU:DAT Fast mode
Fast mode plus
Setup Time for Repeated START
Condition
tSU:STA
Standard mode
Fast mode
Fast mode plus
Rise Time of SDA and SCL
Signals Receiving
Standard mode (0.3 x VL to 0.7 x VL)
(Note 6)
tR Fast mode (0.3 x VL to 0.7 x VL) (Note 6)
Fall Time of SDA and SCL
Signals
Fast mode plus
Standard mode (0.7 x VL to 0.3 x VL)
(Note 6)
tF Fast mode (0.7 x VL to 0.3 x VL) (Note 6)
Setup Time for STOP Condition
Capacitive Load for SDA and SCL
(Note 4)
tSU:STO
Cb
Fast mode plus
Standard mode
Fast mode
Fast mode plus
Standard mode
Fast mode
Fast mode plus
MIN TYP MAX UNITS
4.7
1.3
0.5
4.0
0.6
0.26
4.7
1.3
0.5
4.0
0.6
0.26
0
0
0
250
100
50
4.7
0.6
0.26
20 +
0.1Cb
20 +
0.1Cb
20 +
0.1Cb
20 +
0.1Cb
4.7
0.6
0.26
100
400
1000
kHz
µs
µs
µs
µs
0.9
0.9 µs
ns
µs
1000
300
120
300
300
120
400
400
550
ns
ns
µs
pF
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Maxim Integrated │ 11
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet MAX14830.PDF ] | |
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