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参数资料
| 型号： | MAX14830ETM+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 55/68页 |
| 文件大小： | 0K |
| 描述： | IC UART |
| 产品培训模块： | Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 系列： | * |
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59
Maxim Integrated
Quad Serial UART with 128-Word FIFOs
MAX14830
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
R
X
U1
U0
A4
A3
A2
A1
A0
HiZ
IRQ3
IRQ2
IRQ1
IRQ0
D7
D6
D5
D4
D3
D2
D1
D0
SCLK
MOSI
MISO
CS
UX = UART ADDRESS
AX = REGISTER ADDRESS
DX = EIGHT-BIT REGISTER CONTENTS
= INSTANT AT WHICH MAX14830 SAMPLES MOSI DATA
= INSTANT AT WHICH MAX14830 WRITES MISO DATA
RU1
HiZ
SCLK
MOSI
MISO
CS
UX = UART ADDRESS
AX = REGISTER ADDRESS
= INSTANT AT WHICH MAX14830 SAMPLES MOSI DATA
= INSTANT AT WHICH MAX14830 WRITES MISO DATA
U0
A4
A3
A2
A1
A0
IRQ3
IRQ2
IRQ1
IRQ0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX14830EVKIT# | 功能描述:界面开发工具 MAX14830 Eval Kit RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压: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 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1483CPA | 功能描述:RS-485接口IC RoHS:否 制造商:Texas Instruments 数据速率:250 Kbps 工作电源电压:3.3 V 电源电流:750 uA 工作温度范围:- 40 C to + 125 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-8 封装:Tube |
| MAX1483CPA+ | 功能描述:RS-422/RS-485 接口 IC Slew-Rate-Limited RS-485 Transceivers RoHS:否 制造商:Maxim Integrated 数据速率:1136 Kbps 工作电源电压:3 V to 5.5 V 电源电流:5.9 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:SOIC-28 封装:Tube |
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