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參數(shù)資料
| 型號： | MAX14830ETM+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 20/68頁 |
| 文件大?。?/td> | 0K |
| 描述： | SEMICONDUCTOR OTHER |
| 標(biāo)準(zhǔn)包裝： | 43 |
| 系列： | * |
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27
Maxim Integrated
Quad Serial UART with 128-Word FIFOs
MAX14830
Transmitter Flow Control
When auto transmitter control (FlowCtrl[5:4]) is enabled,
the receiver compares all received words with the XOFF
and XON characters. If an XOFF character is received,
the MAX14830 halts its transmitter from sending further
data. The receiver is not affected and continues reception.
Upon receiving XON, the transmitter then restarts sending
data. The received XON and XOFF characters are filtered
out and are not put into the Receive FIFO, as they do not
have significance to the higher layer protocol. An inerrupt
is not generated.
Turn the transmitter off (MODE1[1] = 1) before enabling
transmitter control.
Receiver Overflow Control
When auto receiver overflow control (FlowCtrl[7:6]) is
enabled, the MAX14830 automatically sends XOFF and
XON control characters to the far end UART to avoid
receiver overflow. XOFF1/XOFF2 is/are sent when the
Receive FIFO fill level reaches the HALT value set in the
FlowLvl register. When the host controller reads data
from the Receive FIFO to a level equal to the RESUME
level programmed into the FlowLvl register, XON1/XON2
is/are automatically sent to the far end station to signal it
to resume data transmission.
XON1/XOFF1 is transmitted before XON2/XOFF2 when
dual character (XON1 and XON2/XOFF1 and XOFF2)
flow control is enabled.
Power-Up and IRQ
IRQ has two functions. During normal operation
(MODE1[7] = 1), IRQ operates as a hardware interrupt
output, whereby the IRQ is active when an interrupt is
pending. An IRQ interrupt can only be produced during
normal operation if at least one of the IRQEn interrupt
enable bits are enabled.
During power-up or following a reset, IRQ has a different
function. It is held low until the MAX14830 is ready for
programming following an initialization delay. Once IRQ
goes high, the MAX14830 is ready to be programmed.
The MODE1[7]: IRQSel bit should then be set to enable
normal IRQ interrupt operation.
In polled mode, the DIVLSB register can be polled to
check whether the MAX14830 is ready for operation. If
the controller gets a valid response from DIVLSB, then
the MAX14830 is ready for operation.
Shutdown Mode
Pull RST to DGND to enter shutdown mode. Shutdown
mode is the lowest power consumption mode. In shut-
down mode, all of the MAX14830 circuitry is off. This
includes the SPI/I2C interface, the registers, the FIFOs,
and clocking circuitry. The LDO is on in shutdown mode.
When the RST input is high, the MAX14830 exits shut-
down mode. The chip initialization is completed when the
MAX14830 sets IRQ to logic-high.
The MAX14830 needs to be reprogrammed following a
shutdown.
Interrupt Structure
The structure of the interrupt is shown in Figure 16.
There are four interrupt source registers for each UART:
ISR, LSR, STSInt, and SpclCharInt. Read the GlobalIRQ
Figure 16. Simplified Interrupt Structure
76
54
3
LSR
21
0
76
5
43
STSInt
21
0
00
GlobalIRQ
76
5
43
ISR
21
0
76 5 43
ISR
LOW-LEVEL INTERRUPTS
TOP-LEVEL
INTERRUPTS
21 0
76 5 43
ISR
21 0
76 5 43
ISR
21 0
76
5
43
SpclCharInt
21
0
IRQ3
IRQ
MODE1[7]:IRQSEL
IRQ1 IRQ0
IRQ2
8
4
[4]
POWER-UP
COMPLETED
[0]
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX14830ETM+ | 功能描述:UART 接口集成電路 Quad Serial UART w/128-Word FIFOs RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| MAX14830ETM+T | 功能描述:UART 接口集成電路 Quad Serial UART w/128-Word FIFOs RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel |
| MAX14830EVKIT# | 功能描述:界面開發(fā)工具 MAX14830 Eval Kit RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| MAX14830EVKIT+ | 制造商:Maxim Integrated Products 功能描述:QUAD UART EV-KIT WITH IO-LINK AND MULTIPROTOCOL - Boxed Product (Development Kits) |
| MAX1483C/D+ | 功能描述:RS-485接口IC low-power transceivers for RS-485 and RS-422 communication RoHS:否 制造商:Texas Instruments 數(shù)據(jù)速率:250 Kbps 工作電源電壓:3.3 V 電源電流:750 uA 工作溫度范圍:- 40 C to + 125 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 封裝:Tube |
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