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參數(shù)資料
| 型號： | MAX14830ETM+ |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | SERIAL COMM CONTROLLER, QCC48 |
| 封裝： | 7 X 7 MM, ROHS COMPLIANT, TQFN-48 |
| 文件頁數(shù)： | 55/68頁 |
| 文件大?。?/td> | 2356K |
| 代理商： | MAX14830ETM+ |
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MAX14830
Quad Serial UART with 128-Word FIFOs
and Internal Oscillator
59
Fast Read Cycle
On the MAX14830 the four UART interrupts share the
single IRQ output. When operating in interrupt-based
mode, the microcontroller needs to locate the source of
the interrupt (i.e. which of the four UARTs generated the
interrupt) and clear the interrupt.
To locate the source of an interrupt more quickly, the
MAX14830 implements the SPI fast read cycle. This
means that the microcontroller can determine which
UART is the source of the interrupt (UART0, UART1,
UART2, or UART3) using only 8 clock cycles (Figure 20).
U1 and U0 bits are ignored during the fast read cycle.
I2C Interface
The MAX14830 contains an I2C-compatible interface
for data communication with a host processor (SCL and
SDA). The interface supports a clock frequency up to
1MHz. SCL and SDA require pullup resistors that are
connected to a positive supply.
START, STOP, and Repeated START Conditions
When writing to the MAX14830 using I2C, the master
sends a START condition (S) followed by the MAX14830
I2C address. After the address, the master sends
the register address of the register that is to be pro-
grammed. The master then ends communication by
Figure 19. SPI Read Cycle
Figure 20. SPI Fast Read Cycle
HIGH-Z
Ax = REGISTER ADDRESS
Dx = EIGHT-BIT REGISTER CONTENTS
SCLK
MOSI
MISO
R
U1
U0
A4
A3
A2
A1
A0
CS
IRQ3
IRQ2
IRQ1
IRQ0
D7
D6
D5
D4
D3
D2
D1
D0
MOSI
Ax = REGISTER ADDRESS
SCLK
CS
MISO
U1
HIGH-Z
R
U0
A4
A3
A2
A1
A0
IRQ3
IRQ2
IRQ1
IRQ0
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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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