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| 型号： | MCP23S09-E/MG |
| 厂商： | Microchip Technology |
| 文件页数： | 50/50页 |
| 文件大小： | 0K |
| 描述： | IC I/O EXPANDER SPI 8B 16QFN |
| 标准包装： | 120 |
| 接口： | SPI |
| 输入/输出数： | 8 |
| 中断输出： | 是 |
| 频率 - 时钟： | 10MHz |
| 电源电压： | 1.8 V ~ 5.5 V |
| 工作温度： | -40°C ~ 125°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 16-VFQFN 裸露焊盘 |
| 供应商设备封装： | 16-QFN-EP（3x3） |
| 包装： | 管件 |
| 产品目录页面： | 684 (CN2011-ZH PDF) |
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2009 Microchip Technology Inc.
DS22121B-page 9
MCP23009/MCP23S09
1.4
Multi-bit Address Decoder
The ADDR pin is used to set the slave address of the
MCP23009 (I2C only) to allow up to eight devices on
the bus using only a single pin. Typically, this would
require three pins.
The multi-bit Address Decoder employs a basic FLASH
ADC architecture (Figure 1-4). The seven comparators
generate 8 unique values based on the analog input.
This value is converted to a 3-bit code which
corresponds to the address bits (A2, A1, A0) in the
serial OPCODE.
Sequence
of
Operation
(see
for
timings):
1.
Upon power up (after VDD stabilizes) the module
becomes active after time tADEN. Note, the
analog value on the ADDR pin must be stable
before this point to ensure accurate address
assignment.
2.
The 3-bit address is latched after tADDRLAT.
3.
The module powers down after the first rising
edge of the serial clock is detected (tADDIS).
Once the address bits are latched, the device will keep
the slave address until a POR or reset condition
occurs.
1.4.1
CALCULATING VOLTAGE ON ADDR
When calculating the required voltage on the ADDR pin
(V2), the set point should be the mid-point of the LSb of
the ADC.
The examples in Figure 1-2 and Figure 1-3 show how
to determine the mid point voltage (V2) and the range
of voltages based on a voltage divider circuit. The
maximum
tolerance
is
20%,
however,
it
is
recommended to use 5% tolerance worst case (10%
total tolerance).
FIGURE 1-2:
VOLTAGE DIVIDER EXAMPLE
R2
A0
A1
A2
V2
R1
VDD
MCP23009 Only
VDD
VSS
ADDR
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| MCP23S17-E/SO | IC I/O EXPANDER SPI 16B 28SOIC |
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MCP23S09EP | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8-Bit I/O Expander with Open-Drain Outputs |
| MCP23S09ESO | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8-Bit I/O Expander with Open-Drain Outputs |
| MCP23S09ESS | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8-Bit I/O Expander with Open-Drain Outputs |
| MCP23S09T | 制造商:MICROCHIP 制造商全称:Microchip Technology 功能描述:8-Bit I/O Expander with Open-Drain Outputs |
| MCP23S09T-E/MG | 功能描述:接口 - 专用 8B I/O Expander SPI interface RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
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